: İTÜ, Fen-Edebiyat Fakültesi Fizik Bölümü. Ayazağa Kampüsü, Maslak İstanbul

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1 ÖZGEÇMİŞ ADI-SOYADI ADRES : GÖNÜL ÖZEN : İTÜ, Fen-Edebiyat Fakültesi Fizik Bölümü Ayazağa Kampüsü, Maslak İstanbul E-POSTA Web : gozenl@itu.edu.tr; gonul@bc.edu : (yapım aşamasında) EĞİTİM DURUMU : Doktora, Boston College (USA), Fizik Programı : Lisans, Hacettepe Üniversitesi, Fizik Mühendisliği Bölümü BURSLAR 01/ /2005 : Ziyaretçi Araştırmacı Bursu, NASA GRANT# NAG Boston College, Physics Department, USA 06/ /2005 : Ziyaretçi Araştırmacı Bursu, NASA GRANT# NAG Boston College, Physics Department, USA 06/ /2006 : Ziyaretçi Araştırmacı Bursu, NASA GRANT# NAG Boston College, Physics Department, USA 06/ /2008 : Ziyaretçi Araştırmacı Bursu, Boston College kaynakları Boston College, Physics Department, USA 09/ /1997 : Ziyaretçi Araştırmac Bursu, NATO-B2 Oxford University, İnorganik Kimya Lab., Oxford, İngiltere 01/ /1994 : Doktora Sonrası Araştırma Bursu: C.N.R.S. Bursu Fiziksel Kimya Laboratuvarı, Meudon, Paris-Fransa 09/ /1990 : Doktora Araştırma Bursu; Boston College, Physics Department, USA

2 GÖREVLER 01/ : Profesör, İTÜ, Fen-Edebiyat Fakültesi 03/ /2002 : Doçent, İTÜ, Fen-Edebiyat Fakültesi 05/ /1996 : Yardımcı Doçent, İTÜ, Fen-Edebiyat Fakültesi 09/ /1991 : Öğretim Görevlisi Simmons College, USA 02/ /1989 : Araştırma Görevlisi (Research Assistant), NASA Langley Research Center, Virginia-USA 09/ /1990 : Araştırma Görevlisi (teaching Assistant) Boston College, USA ÖDÜLLER 06/1988 : Teaching Excellence Award; Boston College, USA 06/1982 : Dönem İkincisi; Fizik Mühendisliği Bölümü Lisans Programı, Hacettepe Üniversitesi HAKEMLİK Optical Materials Journal of Physics C: Condensed Matter Journal of Physics D: Applied Physics Journal of Luminescence Optics Communications Spectro-Chimica Acta Part A: Molecular and Biomolecular Spectroscopy Nanotechnology YÖK Doçentlik Sınav Juri Üyeliği TÜBİTAK ve Üniversitelerin Destekledikleri araştırma projeleri Bilimsel ödül başvuruları ARAŞTIRMA KONULARI Fotonik endüstrisinde kullanılma potansiyeli olan inorganik katı ve toz formundaki (katı-hal lazer malzemeleri, fiber optik lazer malzemeleri, fiber optik yükseltici malzemeleri,

3 aydınlanma endustrisinde kullanilan toz malzemeler, yüksek sıcaklık sensörleri, biyplojik etiketleme ve benzeri) fosfor malzemelerin: Sentezi termal özelliklerinin arastırılması (DTA tekniği kullanılmakta) mikroyapısının arastırılması (XRD, SEM, FTIR ve FT-Raman teknikleri kullanılmakta) Soğurma özelliklerinin arastırılması (UV-VIS-NIR-Soğurma Spektrometresi kullanılmakta) Luminesans özelliklerinin araştırılması (Lazer Spektroskopi teknikleri kullanılmakta) Termal, Yapı, soğurma ve luminesans özellikleri arasında genel bir fiziksel ilişkinin varlığını araştırmak ve elde edilen bulguların kullanılarak fotonik cihaz tasarımını gerçekleştirmek. Kristal örgü içerisine katılmış optiksel olarak aktif iyonlar (Er 3+, Nd 3+ gibi) arasındaki etkileşmeler ve enerji aktarımı prosesleri. YÖNETTİĞİ TEZLER 01/ : Yüksek Lisans Tezi; Cem Uludağ, Bazı Tellürit Esaslı Lazer Camlarında Er 3+ İyonunun Konsantrasyon Sönümü 09/ : Doktora Tezi; Gökhan Bilir, Nd 3+ katkılı Y 2 O 3 nano - fosforun Spektroskopik Özellikleri 10/2006 : Yüksek Lisans Tezi; Reha Özalp, TeO 2 Esaslı Bazı Lazer Camlarında Tm 3+ İyonunun Konsantrasyon Sönümü ile Cam Matrisin Kristallenme Kinetiği 03/2006 : Doktora Tezi; İdris Kabalcı, Tellurit optik camlarında Tulyum iyonunun ışıma olasılıklarına kursunflorürün etkisi 02/2006 : Yüksek Lisans Tezi; Ersoy Şahin, He-Ne/I2(633nm) Lazer Frekans Kararlılığı ve Mutlak Frekans Ölçümü 12/2002 : Doktora Tezi; Seval Cenk, Tm 3+ Katkılı Yeni Optik Fiber malzemelerinin sentezi ve Optik Özelliklerinin İncelenmsi 06/1998 : Yüksek Lisans Tezi; Okan Yılmaz, Bridgman Yöntemi ile CsCdBr 3 Tek Kristalinin Büyütülmesi ve Optik Özelliklerinin İncelenmesi

4 02/1998 : Yüksek Lisans Tezi; Gülefşan Yıldırım, La 3 Lu 2 GaO 12 :Cr 3+ :Nd 3+ Lazer Kristalinde Sıcaklığın Cr 3+ Nd 3+ Enerji Transferine Etkisi. ARAŞTIRMA PROJELERİ Devam eden Projeler. 1. TÜBİTAK 1001 Araştırma Projesi; Araştırmacı, Fiber Optik Kuvvetlendirici ve Lazer Uygulamalarında Kullanılan TeO 2 -WO 3 -CdO Sisteminde Faz Dengelerinin Tespiti ve Sistemin Termodinamik - Optik İncelenmesi. 2. TÜBİTAK 1001 Araştırma Projesi; Araştırmacı, Bazı AMX 3 kristallerinin kristal örgü elektronik enerji seviyelerinin araştırılması. 3. TÜBİTAK 1001 Araştırma Projesi; Yürütücü, Florotellurit optik camların sentezi, termal, optik ve yapısal analizi Tamamlanmış Projeler: 1. TTGV,Stratejik Odak Nokto Projesi; Yürütücü, Lazer Kristallerinin Üretimi 2. İTÜ Araştırma Fonu; Yürütücü, Bridgman Yöntemi ile nonlineer kristallerin Sentezi. 3. İTÜ Yüksek Lisans Tez Projesi ( Okan Yılmaz); Yürütücü, Bridgman yöntemi ile CsCdBr 3 tek kristalinin büyütülmesi ve Optik özelliklerinin incelenmesi 4. İTÜ Doktore Tez Projesi (Seval Cenk); Yürütücü, TeO 2 esaslı malzemelerin sentezi ve optik, termal ve yapısal özelliklerinin incelenmesi 5. İTÜ Doktora Tez Projesi ( İdris Kabalcı), Yürütücü, Tellurit Optik camlarında tulyum iyonunun ışıma olasılıklarına kurşun florürün etkisi 6. Harran Üniversitesi Bilimsel Araştırma Vakfı Projesi (İdris Kabalcı), Yürütücü, Tellurit Optik camlarında tulyum iyonunun ışıma olasılıklarına kurşun florürün etkisi 7. İTÜ Yüksek Lisans Tez Projesi ( Okan Yılmaz), Yürütücü, Bridgman yöntemi ile CsCdBr 3 tek kristalinin büyütülmesi ve Optik özelliklerinin incelenmesi 8. NASA - Boston College, Physics Department, Boston-USA Araştırma Projesi; Araştırmacı, Narrow Line Excitation of Some Laser Crystals.

5 ÖĞRETİME KATKISI 1) Türkçe dilinde verdiği dersler: Kuantum Fiziği II- (Fizik Mühendisliği Bölümüne) Optik ve Fotonik Kristaller (Fizik Mühendisliği Bölümüne) Genel Fizik I ve II ( Değişik Bölümlere) Spektral analiz yöntemler ( Fizik Mühendisliği Bölümüne ) Modern Fizik ( Elektronik ve Haberleşme Bölümüne) Termodinamik ( Matematik Mühendisliği Bölümüne) Katıhal Fiziği I ( Fizik Mühendisliği Bölümüne) Katıhal Fiziği II ( Fizik Mühendisliği Bölümüne) Lazer Spektroskopi Teknikleri ve Uygulamaları (Yüksek Lisans dersi) Deneysel Fizik ( Fizik Mühendisliği Bölümüne) Bitirme ödevi İleri Fizik Proje Laboratuvarı 2) İngilizce dilinde verdiği dersler: Physics Laboratory ( Boston College, Boston-USA) Fundamentals of Physics I and II (Simmons College, Boston-USA ) General Physics I and II (İTÜ) Physics I and II (Physics 101, 102 and 106) (İTÜ) Physics of Solids (DPT destekli Mühendislikte İleri Teknolojiler Programı-Yüksek Lisans dersi) YÖNETİME KATKISI 1. Üniversite: 03/ /2004 : Araştırmacı ve Yürütme Kurulu Üyeliği, İTÜ-DPT Destekli İnterdisipliner Malzeme Bilimi ve Mühendisliği Yüksek Lisans ve Doktora Pogramı 2. Fen Edebiyat Fakültesi: : Fakülte Bülteni Komisyonu Üyeliği : İTÜ den Haberler Komisyonu Üyeliği : Spor Komisyonu Üyeliği

6 3. Fizik Bölümü: : Fizik Bölümü Başkan Yardımcılığı : Staj Komisyonu Üyeliği : Araştırma Görevlisi Bilim Sınav Jüri Üyeliği : Deneysel Fizik Komisyonu Üyeliği : Eğitim Komisyonu Üyeliği : Eğitim Laboratuvarları Komisyonu Üyeliği : Atelye ve Yerleşim Komisyonu Üyeliği KİTAP Disordered Solids : Structures and Processes, ed. B. Di Bartolo and assistant eds. G. Özen and, J. Collins, Published by Plenum Publishing Company, New York (1990) YAYIN LİSTESİ (Hakemli Dergiler) 1. Xu-W Denis-JP Özen-G Goldner-P Pelle-F The Up-Conversion Emission of Glass-Ceramics Doped with Er 3+ Ions and Codoped with Er 3+ and Yb 3+ Ions upon 650nm Excitation PHYSICA STATUS SOLIDI A-APPLIED RES. (1993) Vol 139(2) pp Özen-G Denis-JP Goldner-P Wu-X Genotelle-M Pelle-F Enhanced Tm 3+ Blue Emission in Tm, Yb, Co-Doped Fluorophosphate Glasses Due to Back Energy-Transfer Processes APPLIED PHYSICS LETTERS (1993) Vol 62(9) pp Wu-X Denis-JP Özen-G Goldner-P Genotelle-M Pelle-E The Blue Up-Conversion Luminescence of Vitroceramics Codoped with Tm 3+ and Yb 3+ Ions Pumped with 680nm CHEMICAL PHYSICS LETTERS (1993) Vol 203(2-3) pp Wu-X Denis-JP Özen-G Goldner-P Pelle-F The UV, Blue and Green Up-Conversion Luminescence of PbF 2 +GeO 2 - Er 2 O 3 Pumped with 650 nm APPLIED PHYS. B: PHOTOPHY. & LASER CHEM. (1993) Vol 56 pp Wu-X Denis-JP Özen-G Goldner-P Pelle-F The Blue Up-Conversion Luminescence of Er 3+ Ions in Vitroceramics Doped with Yb 3+ Under Infrared Excitation SOLID STATE COMMUNICATIONS (1993) Vol 85(4) pp

7 6. Özen-G Denis-JP Wu-X Pelle-F Blanzat-B Up-Conversion Luminescence of Tm 3+ in Yb 3+ Doped Fluorophosphate Glasses Under 683nm Excitation JOURNAL OF NON-CRYSTALLINE SOLIDS (1994) Vol 176(2-3) pp Denis-JP Kermaoui-A Xu-W Özen-G Pelle-F Efficient Blue and Red Up-Conversion of Infrared Light in Oxyfluoride Tellurite Ceramics EUROPEAN JOURNAL OF SOLID STATE AND INORGANIC CHEMISTRY (1994) Vol 31(3) pp Xu-W Denis-JP Özen-G Kermaoui-A Pelle-F Blanzat-B Red to Blue Up-Conversion Emission of Tm 3+ Ions in Yb 3+ Doped Glass-Ceramic JOURNAL OF APPLIED PHYSICS (1994) Vol 75(8) pp Wu-X Denis-JP Özen-G Pelle-F Infrared-to-Visible Conversion Luminescence of Tm 3+ and Yb 3+ Ions in Glass-Ceramics JOURNAL OF LUMINESCENCE (1994) Vol 60(1) pp Denis-JP Özen-G Wu-X Kermaoui-A Pelle-F Blanzat-B Compositional Dependence of Infrared to Blue and Red Conversion Luminescence in Oxyfluoride Glass-Ceramics Co-Doped with Tm 3+ and Yb 3+ Ions JOURNAL OF MATERIALS RESEARCH (1994) Vol 9(8) pp Özen-G Wu-X Denis-JP Kermaoui-A Pelle-F Blanzat-B Optical-Properties and Up-Converted Emissions of Tm 3+ in Yb 3+ Doped Fluorophosphate Glasses J. OF PHYSICS AND CHEMISTRY OF SOLIDS (1993) Vol 54(11) pp Kermaoui-A Denis-JP Özen-G Goldner-P Pelle-F Blanzat-B Effect of Yb 3+ on Red to Blue Conversion Fluorescence of Tm 3+ in Fluorozirconate Glass OPTICS COMMUNICATIONS (1994) Vol 110(5-6) pp Wu-X Denis-JP Özen-G Kermaoui-A Pelle-F The Up-Conversion Luminescence of Tm 3+ in Glass-Ceramics Doped with Yb 3+ Under Infrared Excitation PHYSICA STATUS SOLIDI A-APPLIED RES. (1994) Vol 141(2) pp Özen-G ESA Process and Cross-Relaxation in Tm 3+ Doped Fluorophosphate Glass SPECIAL ISSUE OF THE BILLETIN OF THE TECHNICAL UNIVERSITY OF ISTANBUL (1994) Vol Kermaoui-A Özen-G Goldner-P Denis-JP Pelle-F Infrared to Blue Up-Conversion Fluorescence in Heavy-Metal Fluoride Glasses with Tm 3+ and Yb 3+ ions J. OF PHYSICS AND CHEMISTRY OF SOLIDS (1994) Vol 55 pp

8 16. Özen-G Kermaoui-A Denis-JP Xu-W Pelle-F Blanzat-B Excited-State Absorption Mechanisms of Red to UV and Blue Conversion Luminescence in Tm 3+ Doped Fluorophosphate Glass JOURNAL OF LUMINESCENCE (1995) Vol 63(1-2) pp Özen-G Denis-JP Genotelle-M Pelle-F Tm-Yb-Tm Energy Transfers and Effect of Temperature on the Fluorescence Intensities in Oxyfluoride Tellurite Compounds JOURNAL OF PHYSICS-CONDENSED MATTER (1995) Vol 7(22) pp Demirata-Öztürk-B Özen-G Filik-H Tor-I Afsar-H, Spectrofluorometric Determination of Hydrogen Peroxide JOURNAL OF FLUORESCENCE (1998) Vol.8(2) pp Özen-G DiBartolo-B Thermal dependence of the Cr-to-Nd energy transfer in Lanthanum Lutetium Gallium Garnet APPLIED SPECTROSCOPY (1999) Vol 53(11) pp Özen-G DiBartolo-B Energy transfer and thermalization in LiYF 4 : Tm 3+, Ho 3+ APPLIED PHYSICS B: LASERS AND OPTICS (2000) Vol 70 pp Özen-G Belin-B Yıldırım-G Güven-H Lanthanum Lutetium Gallium Garnet: Analysis of Elemental Composition and Energy Transfer OPTICS COMMUNICATIONS (2000) Vol 173(5&6) pp Özen-G Demirata-B Energy Transfer Characteristics of Hydrogen Peroxide Induced Ce 3+ -Ce 4+ Mixture SPECTROCHIMICA ACTA A: MOLECULAR AND BIOMOLECULAR SPECTROSCOPY (2000) Vol 56(9) pp Özen-G Salihoğlu-S Tm-to-Ho Resonant and Nonresonant Energy Transfer in LiYF 4. OPTICS COMMUNICATIONS (2000) Vol 180 pp Özen-G Temperature Effect on the Radiative and Nonradiative Processes in LLGG:Cr 3+, Nd 3+ OPTICS COMMUNICATIONS (2000) Vol 183(5-6) pp Öveçoğlu-ML Özen-G Demirata-B Genç-A. Microstructural Characterization and Crystallization Kinetics of TeO 2 -LiCl Glasses J. EUROPEAN CERAMIC SOCIETY (2001) Vol 21(2) pp Özen-G DiBartolo-B The Microscopic Interaction Parameter for the Tm-to-Ho Resonant Energy Transfer in LiYF 4 JOURNAL OF PHYSICS-CONDENSED MATTER (2001) Vol 13(1) pp

9 27. Özen-G Demirata-B Öveçoğlu-ML Genç-A Optical and Thermal Properties of Tm 3+ Doped Telluride Glasses SPECTROCHIMICA ACTA A: MOLECULAR AND BIOMOLECULAR SPECTROSCOPY (2001) Vol 57 (2) pp Özen-G Demirata-B Öveçoğlu-ML Effect of Composition on The Thermal Properties and Spontaneous Probabilities of Tm 3+ -doped LiCl-TeO 2 JOURNAL OF MATERIALS RESEARCH (2001) Vol 16 (5) pp Cenk-S Demirata-B Öveçoğlu-ML Özen-G Thermal Properties and Optical Transition Probabilities of Tm 3+ doped TeO 2 -WO 3 glass SPECTROCHIMICA ACTA A: MOLECULAR AND BIOMOLECULAR SPECTROSCOPY (2001) Vol. 57 (12) pp Ozen G, Demirata B, Ovecoğlu ML, et al. Effect of modifier content on the crystallization and the optical gaps of TeO2-LiCl glass KEY ENG MAT (2002) Vol pp Ovecoglu ML, Ozen G, Demirata B, et al. Crystallization behaviour of xteo(2)-(1-x)licl (x=0.5 and 0.7 mol.) glasses KEY ENG MAT (2002) Vol pp Özen G, Aydınlı A, Cenk S, Sennaroğlu A Effect of Composition on the Spontaneous Emission Probabilities, Stimulated Emission Cross-Sections and Local Environment of Tm 3+ in TeO 2 + WO 3 glass JOURNAL OF LUMINESCENCE (2003) Vol. 101 (4) pp Ozalp MR, Özen G, Sennaroglu A, et al. Stimulated and spontaneous emission probabilities of Tm3+ in TeO2-CdCl2 glass: the role of local structure OPT COMMUN 217 (1-6): MAR Sennaroglu, A; Kurt, A; Ozen, G Effect of cross relaxation on the 1470 and 1800 nm emissions in Tm3+: TeO2-CdCl2 glass JOURNAL OF PHYSICS-CONDENSED MATTER16 (15): APR Kalem, V; Ozen, G; Altin, F; et al. Kinetic study and optical investigations of some TeO2-GeO2 glasses KEY ENGINEERING MATERIALS, : Part Kalem, V; Altin, F; Ovecoglu, ML; Ozen, G et all. Crystallization behavior of (1- x)teo2-xgeo(2) (x=0.1 and 0.3 mol.) glasses KEY ENGINEERING MATERIALS, : Part Ozalp, MR; Ozen, G; Altin, F; et al. Effect of modifier content on the crystallization and the optical gaps of a TeO2-ZnO glass

10 KEY ENGINEERING MATERIALS, : Part Altin, F; Ovecoglu, ML; Kalem, V; Ozen G et all.. Crystallization behavior of some TeO2-GeO2-ZnO glasses KEY ENGINEERING MATERIALS, : Part Ovecoglu, ML; Ozalp, MR; Ozen, G; et al. Crystallization behaviour of some TeO2-ZnO glasses KEY ENGINEERING MATERIALS, : Part Altin, F; Kalem, V; Ozen, G; et al. Optical properties and crystallization kinetics of TeO2-GeO2-ZnO glasses KEY ENGINEERING MATERIALS, : Part Ozen, G; Forte, O; Di Bartolo, B Downconversion and upconversion dynamics in Pr-doped Y3Al5O12 crystals JOURNAL OF APPLIED PHYSICS, 97 (1): Art. No JAN Ozen, G; Forte, O; Di Bartolo, B Upconversion dynamics in Pr-doped YAlO3 and Y3Al5O12 laser crystals OPTICAL MATERIALS, 27 (11): OCT Sennaroglu, A; Kabalci, I; Kurt, A; Ozen, G Spectroscopic properties ot Tm3+: TeO2-PbF2 glasses JOURNAL OF LUMINESCENCE, 116 (1-2): JAN-FEB Ovecoglu, ML; Ozen, G; Cenk, S Microstructural characterization and crystallizationbehaviour of (1-x)TeO2-xWO(3) (x=0. 15, 0.25, 0.3 mol) glasses JOURNAL OFTHE EUROPEAN CERAMIC SOCIETY, 26 (7): Hamid, R; Sabin, E; Celik, M; Ozen G. 10(-12) level reproducibility of an iodine-stabilized He-Ne laser endorsed by absolute frequency measurements in the BIPM and UME METROLOGIA, 43 (1): FEB Sennaroglu, A; Kabalci, I; Kurt, A; Ozen G. Spectroscopic properties ot Tm3+: TeO2-PbF2 glasses JOURNAL OF LUMINESCENCE, 116 (1-2): JAN-FEB Kabalci, I; Ozen, G; Ovecoglu, ML; et al. Thermal study and linear optical properties of (1-x)TeO2-(x)PbF2 (x=0.10, 0.15 and 0.25 mol) glasses JOURNAL OF ALLOYS AND COMPOUNDS, 419 (1-2): AUG Ozen, G; Forte, O; Di Bartolo, B; et al. Upconversion as a discriminating tool in site-selective spectroscopy of the praseodymium ion in Y3Al5O12

11 JOURNAL OF APPLIED PHYSICS, 102 (2): Art. No JUL Oz, B; Ovecoglu, ML; Kabalci, I, Ozen G et al. Microstructural characterization and crystallization kinetics of (1-x)TeO2-xK(2)O(x=0.05, 0.10, 0.15, 0.20 mol) glasses JOURNAL OF THE EUROPEAN CERAMIC SOCIETY, 27 (10): Ozen, G; Forte, O; Di Bartolo, B; et al. Dynamics of the excitation and upconversion processes in YAlO3 : Pr single crystals JOURNAL OF LUMINESCENCE, 125 (1-2): JUL-AUG Kalaycioglu, H; Sennaroglu, A; Kurt, A; Ozen G. Spectroscopic analysis of Tm3+: LuAG JOURNAL OF PHYSICS-CONDENSED MATTER, 19 (3): Art. No JAN Esin, C; Kabalci, I; Ovecoglu, ML; Ozen G et al. Crystallization behaviour of (1- x)teo2-xbao (x=0. 10, and 0.25 in molar ratio) glasses JOURNAL OF THE EUROPEAN RAMIC SOCIETY, 27 (2-3): Ovecoglu, ML; Kabalci, I; Ozen, G; et al. Microstructural characterization of (1- x)teo2-xpbf(2) (x=0.10, and 0.25 mol) glasses JOURNAL OF THE EUROPEAN CERAMIC SOCIETY, 27 (2-3): Oz, B; Kabalci, I; Ovecoglu, ML; Ozen G et al. Thermal properties and crystallization behavior of some TeO2-K2O glasses JOURNAL OF THE EUROPEAN CERAMIC SOCIETY, 27 (2-3): Di Bartolo, B; Ozen, G; Collins, J; et al. Up-conversion at different sites in Pr-doped Y3Al5O12 JOURNAL OF LUMINESCENCE, 122: Sp. Iss. SI JAN-APR Konferans Makaleleri 1. (Konuşma) G. Armagan B-DiBartolo G. Özen Mechanism for Cr to Nd energy transfer in laser type crystals, PROC. OF THE INT. SCHOOL ON EXCITED STATES OF TRANSITION METAL ELEMENTS (Wroclaw-Poland (1988), World science Company (1988) 2. (Konuşma) Özen-G Pelle-F Analysis of upconverted blue emission due to energy transfer processes in fluorophosphate glass PROC. ELECTROCHEM. SOC., PHYSICS AND CHEMISTRY OF LUMINESCENT MATERIALS, (1999) Vol 98(24) pp (Konuşma) G-Özen B-Demirata ML-Öveçoğlu A-Genç Effect of modifier on the crystallization and the optical gaps of TeO2-LiCl glass PROC. 7 th CONFERENCE OF EUROPEAN CERAMIC SOC., KEY ENGINEERING

12 MATERIALS by Trans. Tech. Publications Ltd. (2001) 4. (poster) ML-Öveçoğlu G-Özen B-Demirata A-Genç Crystallization behaviour of xteo2-(1-x)licl ( x = 0.5 and 0.7mol) glasses PROC. 7 th CONFERENCE OF EUROPEAN CERAMIC SOC., KEY ENGINEERING MATERIALS by Trans. Tech. Publications Ltd. (2001) 5. J. M. Collins, B. Di Bartolo and G. Ozen, Vibronic Studies of Optical Centers in YAG, Proc. 208 th Meeting of the Electrochemical Society, Los Angeles, October 16-21, Xuesheng Chen, K. Li, K. Zou, R. Zhang, H. Jiang, G. Ozen, and B. Di Bartolo, Novel electro-optic ceramic materials for microchip and high power lasers Symposium on Micro- and Nanosystems held at the 2003 MRS Fall Meeting, DEC 01-03, 2003 MICRO- AND NANOSYSTEMS : , Kabalci I, Ozen G, Kurt A, et al. Spectroscopic properties of Tm3+: TeO2-PbF2 glasses in the near infrared Conference on Solid State Lasers and Amplifiers, APR 27-29, 2004 SOLID STATE LASERS AND AMPLIFIERS : , Kabalci I, Ozen G, Kurt A, et al. Composition dependence of the Judd-Ofelt intensity parameters in TeO2-PbF2 : TM3+ glasses Symposium on Progress in Compound Semiconductor Materials IV held at the 2004 MRS Fall Meeting, NOV 29-DEC 03, 2004 PROGRESS IN COMPOUND SEMICONDUCTOR MATERIALS IV-ELECTRONIC AND OPTOELECTRONIC APPLICATIONS : , Ozen G, Collins JM, Forte O, et al. Luminescence and upconversion dynamics of praseodymium in LiLuF4 laser crystals Symposium on Materials for Space Applications held at the 2004 MRS Fall Meeting, NOV 29-DEC 03, 2004 MATERIALS FOR SPACE APPLICATIONS : , Ozen G, Kabalci I, Collins JM, et al. Effect of the glass composition on the spontaneous emission probabilities of Tm3+ in TeO2-ZnO glass Symposium on Solid-State Chemistry of Inorganic Materials V held at the 2004 MRS Fall Meeting, NOV 29-DEC 02, 2004 SOLID-STATE CHEMISTRY OF INORGANIC MATERIALS V : , Kalaycıoğlu h, Çankaya H, Ozen G, Öveçoğlu ML, Sennaroğlu A Laser action in bulk Nd3+ doped tellurite glass, Conference on Lasers and Electro- Optics/quantum Electronics and Laser Science, CLEO-QELS, San Jose, CA,USA, May 4 9/ Tatar D, Kaygusuz H, Tezcan F, Erim B, Oveçoğlu ML, Ozen G, Y2O3 Nanophosphors Synthezed by Combustion adn Thermal Decomposition

13 Techniques,11th Annual Conference on NanoScience and NanoTechnology, NSTI- NanoTech, Boston-USA, June 1-5/2008 Konferans Özetleri 1. (Konuşma) G-Özen G-Armagan M-Buoncristiani B-DiBartolo Energy transfer processes between Tm 3+ and Ho 3+ ions in LiYF 4 Bulletin of the American Physical Society (1991) Vol. 36(4) 2. (Konuşma) G-Armagan M-Buoncristiani G-Özen B-DiBartolo Interionic interactions among Cr, Tm and Ho ions in Y 3 Al 5 O 12 and LiYF 4 ", in Bulletin of the American Physical Society (1989) Vol. 34(7) 3. (Konuşma) G. Armagan B-DiBartolo G. Özen Mechanism for Cr to Nd energy transfer in laser type crystals, The international school on excited states of transition metal elements, Wroclaw-Poland (1988) 4. (Konuşma) G-Armagan G-Özen J-Cen B-Dibartolo Temperature dependence of Cr3+,Nd3+ energy transfer in garnets Proceedings of the International Conference on Excited State Processes in Condenced matter (Beijing, China, Aug , 1987) 5. (Konuşma) G-Özen JP-Denis XU-Wu Ph.-Goldner F-Pellé Spectroscopic Study of Infrared to Blue Upconversion Processes in a Glass-Ceramics 6. (Konuşma) G. Özen, Xu Wu, F. Pelle, Compounds Codoped with Yb3+and Pr3+ Ions International Conference on Luminescence and Display Materials of the Electrochemical Society, Inc, Toronto-Canada (Oct. 1992) (Konuşma) XU-Wu JP-Denis G-Özen Ph.-Goldner F-Pellé The UV, Blue and Green Upconversion Luminescence of Er3+ Ions in PbF2+GeO2:Er3+ Vitroceramics Pumped with 650nm International Conference on Luminescence and Display Materials of the Electrochemical Society, Inc", Toronto-Canada (Oct. 1992) (Konuşma) XU-Wu JP-Denis G-Özen Ph.-Goldner F-Pellé Infrared to Blue Upconversion of Er3+ Ions in Vitroceramics Codoped with Yb3+ and Er3+ Ions and Temperature Effect International Conference on Luminescence and Display Materials of the Electrochemical Society, Inc. Toronto-Canada (Oct. 1992) (poster) G-Özen JP-Denis XU-Wu A-Kermaoui F-Pellé Spectral Properties of the Upconversion Processes between Yb 3+ and Tm 3+ Ions in Fluorophosphate Glass Under Infrared Excitation C.C.S.T., Meudon Bellevue (Jan. 1993)

14 10. (poster) XU-Wu JP-Denis G-Özen Ph.-Goldner F-Pellé The UV, Blue and Green Upconversion Luminescence of PbF2+GeO2:Er2O3 Pumped with 650nm", C.C.S.T, Meudon-Bellevue (Jan. 1993) 11. (poster) XU-Wu JP-Denis G-Özen F-Pellé Infrared to Visible Conversion Luminescence of Tm3+ and Yb3+ Ions in Glass Ceramics International Conference on Luminescence 93 Connecticut - U.S.A (August 9-13, 1993) 12. (poster) G-Özen JP-Denis XU-Wu and F-Pellé Upconversion of 683 nm Light in Tm, Yb Codoped Fluorophosphate Glasses International Conference on Luminescence'93, Connecticut USA (Aug. 9-13, 1993) 13. (Konuşma) G-Özen Enhanced Red to Blue Conversion Luminescence of Tm3+ in Yb3+-Doped Fluorophosphate GlassProceedings of the 11th course: Nonlinear Spectroscopy of Solids ed. by B. Bowlby and S. Kyrkos, ( June 1993). 14. (Konuşma) G-Özen JP-Denis F-Pellé Temperature Effect on Upconversion Fluorescence via Tm-Yb-Tm Energy Transfers in Oxyfluoride Tellurite Compounds 35th IUPAC Congress İstanbul (14-19 August 1995). 15. (poster) B-Demirata G-Özen H-Afşar Optical Studies of Cerous Solutions 35th IUPAC Congress, İstanbul (14-19 August 1995). 16. (Konuşma) G-Özen Influence of Cross-Relaxation on ESA-Process in Tm3+ Doped Fluorophosphate Glass NATO-Advanced Summer School, Erice-Sicily (15-30 June 1995) 17. (Konuşma) G-Özen Tm3+ Katkılı Flor-Fosfat Camında Gözlenen Işımalı Geçiş Olasılıklarının Hesabı XI. National Chemistry Conference, Van (16-20 June 1997). 18. (poster) G-Özen Quantitative Analysis of Tm-Yb-Tm Energy Transfer Processes in Fluorophosphate Glass International Syposium on Lasers, Atomic and Molecular Physics, İstanbul-Turkey (16-20 September 1997) 19. (poster) G-Özen B-DiBartolo Energy transfer from Tm3+ to Ho3+ in LiYF4 5th International Conference on Methods and Applications of Fluorescence, Berlin-Germany (21-24 September 1997) 20. (poster) B-Demirata-Öztürk G-Özen H. Afsar Spectrofluorometric Determination of Hydrogen Peroxide 5th International Conference on Methods and Applications of Fluorescence,

15 Berlin-Germany (21-24 September 1997) 21. (Konuşma) G-Özen F-Pellé Analysis of Upconverted Blue Emission due to Energy Transfer Processes in Fluorophosphate Glass The 194 th Meeting of The Electrochemical Society, Boston -USA (October-1998) 22. (poster) G-Özen B-Demirata Analysis of the Structure and the Optical Properties of Tm2O3 Doped LiCl-TeO2 Glasses International Conference: Instrumental Methods of Analysis; Modern Trends and Applications, Chalkidiki-Greece (September-1999) 23. (Konuşma) G-Özen B-Demirata ML-Öveçoğlu Tm3+ katkılı TeO2 LiCl camların termal ve optik özelikleri 1. National electro-optics meeting; Bilkent Üniversitesi Ankara (24 Nov., 1999) 24. (Konuşma) G-Özen B-Demirata ML-Öveçoğlu Thermal and Optical Properties of Tm 3+ doped Tellurite Glasses 13 th Workshop: Advanced Topics in Luminescence Spectroscopy, Erice Sicily (July-2000) 25. (poster) G-Özen B-DiBartolo Temperature Effect on the Energy Transfer in LLGG: Cr3+-Nd3+ The eleventh international school on quantum electronics: Laser Physics andapplications Varna-Bulgaria (September-2000) 26. (poster) G-Özen Microscopic Interaction Parameter of Tm-to-Ho Resonant Energy Transfer in YLiF4 The eleventh international school on quantum electronic: Laser Physics and Applications Varna-Bulgaria (September-2000) 27. (poster) B-Belin G-Özen H. Güven Lantahanum Lutetium Gallium Garnets Doped With Cr3+ and Nd3+ ions: Analysis of Elemental Composition and Energy Transfer Int. Conference: Advanced optical materials and devices, Vilnius-Lithuania (2000) 28. (poster) S-Cenk and G-Özen An investigation on the relationship between the structure, thermal and optical properties of Tm3+ doped tellurite glasses The eleventh international school on quantum electronic: Laser Physics and Applications Varna-Bulgaria (September 19-22, 2000) 29. (poster) S-Cenk G-Özen ML-Öveçoğlu B-Demirata Thermal and Optical properties of Tm 3+ doped TeO 2 WO 3 glass ECERS Conference and exhibition of the European Ceramic Society,Brugge Belgium (2001) 30. (Konuşma) G-Özen B-Demirata ML-Öveçoğlu A-Genç

16 Thermal properties and spontaneous emission probabilities of Tm 3+ in TeO 2 -LiCl glass ECERS Conference and exhibition of the European Ceramic Society, Brugge Belgium (2001) 31. (poster) ML-Öveçoğlu G-Özen B-Demirata A-Genç Crystallization behavior of xteo 2 (1-x)LiCl (x = 0.6 and 0.7 mol) glasses, ECERS Conference and exhibition of the European Ceramic Society, Brugge Belgium (2001) 32. (Konuşma) G-Özen Radiative and nonradiative processes in LLGG:Cr3+, Nd3+ laser crystal, NATO/ASI: Spectroscopy of systems with spatially confined structures Italy-Erice (2001) 33. (Konuşma) G. Özen, MR. Ozalp, A. Sennaroglu, A. Kurt, "Concentration Dependence of the Infrared Luminescence Efficiencies in TeO2-CdCl2:Tm3+ Glass Conference on Lasers and Electrooptics organized by Optical Society of America, Maryland-USA (May 2003) 34. (poster) M. R. Özalp, G. Özen, F. Altın, V. Kalem, M. L. Öveçoğlu "Effect of Modifier Content on the Crystallization and the Optical Gaps of TeO2-ZnO glass" Conference of European Ceramic Society, Istanbul (July, 2003) 35. (poster) M. L. Öveçoğlu, M. R. Özalp, G. Özen, F. Altın, V. Kalem "Crystallization Behaviour of Some TeO2 - ZnO Glasses" Conference of European Ceramic Society, Istanbul (July, 2003) 36. (poster) Altin, ML. Ovecoglu, V. Kalem, B. Ozkol, G. Ozen " Crystallization Behavior of Some TeO2-GeO2-ZnO glasses" Conference of European Ceramic Society, Istanbul (July, 2003) 37. (poster) F. Altin, V. Kalem, G. Ozen, ML. Ovecoglu, MR. Ozalp " Optical Properties and crystallization Kinetics of TeO2-GeO2-ZnO Glasses" Conference of European Ceramic Society, Istanbul (July, 2003) 38. (poster) V. Kalem, F. Altin, ML. Ovecoglu, G. Ozen, B. Ozkol "Crystallization behavior of (1-x)TeO2 - GeO2 TeO2 - GeO2 Glasses" Conference of European Ceramic Society, Istanbul (July, 2003) 39. (poster) V. Kalem, G. Ozen, F. Altin, ML. Ovecoglu, MR. Ozalp " Kinetic Study and Optical Investigations of Some TeO 2 - GeO 2 Glasses" Conference of European Ceramic Society, Istanbul (July, 2003) 40. (poster) Gonul Ozen, Ottavio Forte, John Collins, Xuesheng Chen, and Baldassare DiBartolo, Upconversion Dynamics in Pr3+ doped YAG and YAlO3 Laser Crystals, American Physical Society Spring Meeting of the New England Section, March (poster) Xuesheng Chen, K. Li, K. Zou, R. Zhang, H. Jiang, G. Ozen, and B. Di Bartolo, Novel Opto-Ceramic Materials for Microchip and High Power Ceramic Lasers, accepted, Fall Meeting of Materials Research Society, Boston, USA, December 1-5, 2004.

17 42. (poster) Kabalci, Idris 1 ; Ozen, Gonul 1, 3 ; Kurt, Adnan 2 ; Sennaroglu, Alphan, Composition dependence of the intensity parameters in TeO2-PbF2 : Tm3+ glasses. Fall Meeting of Materials Research Society, Boston, USA, December 1-5, (poster) Ozen, Gonul; Kabalci, Idris; Sennaroglu, Alphan; Kurt, Adnan; Collins, John M; Chen, Xuesheng; Forte, Ottavio DiBartolo, Baldassare, Effect of the Local Structure on the Spontaneous and Stimulated Emission Probabilities of Tm3+ in TeO2-ZnO Glass, Fall Meeting of Materials Research Society, Boston, USA, December 1-5, (poster) Ozen, Gonul; Collins, John M; Forte, Ottavio; Meylman, Misha; Abdulsabirov, R. Yu; DiBartolo, Baldassare, Effect of temperature on the luminescence and up-conversion dynamics of Praseodymium in LiLuF4 laser crystal, The 2004 Fall Meeting of Materials Research Society, Boston, USA, December 1-5, (Davetli konuşma) G. Özen, O. Forte, and B. Di Bartolo, Upconversion Dynamics in Pr-Doped YalO3 and Y3Al5O12 Crystals, International Workshop on Photonics and Electronic Materials, San Sebastian, Spain in June (poster) Humeyra Orucu, Gonul Ozen, John Collins and Baldassare Di Bartolo; Spectroscopy of Chromium doped Garnets in a Wide Temperature Range, MRS Fall Meeting; Symposium EE: Phonon Engineering--Theory and Applications, November 26 30, Kaygusuz H, Tezcan F, Tatar D, Erim B, Oveçoğlu ML, Ozen G, Y2O3 Nanophosphors Synthezed by Combustion Technique,4. Ulusal NanoBilim ve NanoTeknoloji Konferansı, İTÜ İstanbul, Haziran 9-11/ Tezcan F, Kaygusuz H, Tatar D, Ozen G, Oveçoğlu ML, Erim B, Y2O3 Nanophosphors Synthezed by Thermal Decomposition Technique, 4. Ulusal NanoBilim ve NanoTeknoloji Konferansı, İTÜ İstanbul, Haziran 9-11/2008.