张德龙

张德龙 教师名称：张德龙 教师拼音名称：Delong Zhang 性别：男 学科：Optical Engineering 职称：教授 其他联系方式 邮箱：dlzhang@tju.edu.cn 基本信息 研究方向 获奖情况 论文成果 Prof. Zhang graduated from Department of Physics, Nankai University, Tianjin,China, in 1994. In the same year, he joined Department of Optoelectronics and Information Engineering, School of Precision Instruments and Opto-electronics Engineering, Tianjin University,China. In 2001, he was promoted exceptionally to professor. Since then, he has been a full professor at Tianjin University. From July 2001 to June 2002, he was with Department of Electronic Engineering, City University of Hong Kong, where he engaged in a collaboration study on LiNbO3-based integrated optical devices. Since then, a close academic collaboration relationship has been established with the City University of Hong Kong. He visits the university every year to carry out academic exchange activities and strengthen the cooperation each other.      Prof. Zhang emphasizes his research interests on the development of LiNbO3-based active and passive integrated optical waveguide devices. He and his co-workers firstly proposed and carried out the development of photorefractive-damage-resistant active and passive Ti in-diffused LiNbO3 strip waveguide based on the concept of near-stoichiometry, and have successfully fabricated various types of photorefractive-inhibitor  doped active and passive photorefractive-damage-resistant near-stoichiometric Ti in-diffused LiNbO3 strip waveguides. The succeeding in the fabrication of these waveguides opens up with a new way and constructs an important technical supporting platform for the further development of novel active and passive devices. His research group has also developed some photorefractive-damage-resistant active and passive devices such as waveguide amplifier and high-speed optical filter. In addition, Dr. Zhang and his co-workers have also carried out much research work on the property improvement of related materials, investigated a number of crucial scientific and technical problems related to the fabrication and performance of the devices, and obtained a lot of novel and valuable research results. These results play an active role in promoting and accelerating the step of LiNbO3-based devices to the utilization stage. Dr. Zhang is the author or co-author of over 180 technical papers published in peer-reviewed international journals with good reputation.        As a reviewing expert, Prof. Zhang serves to a number of scientific research grant foundations or organizations, such as National Natural Science Foundation of China (NSFC), Specialized Research Fund for the Doctoral Program of Higher Education of China, Henry Fok Fund (Awards), Awards for Excellent Research Results and Scholars of Colleges and Universities of China, and National Post Doctoral Fund of China. Prof. Zhang also serves to academic community. As an invited reviewer, he serves to near 30 international scientific journals, such as Appl. Phys. Lett., Opt. Lett., Opt. Exp., Opt. Mater. Exp., J. Lightwave Technol., IEEE Photon. Technol. Lett., ACS Appl. Mater. Interfaces, J. Appl. Phys., J. Mater. Sci., J. Phys. Chem., Mater. Sci.Eng.C-Mater. Biol. Appl., Crystal Growth & Design, Mater. Chem. Phys., J. Lumin., J. Mater Res., Opt. Comm., Opt. Quant. Electron., Sol. Stat. Sci., Cryst. Res. Technol., Matter. Lett., J. Am. Ceram. Soc., J. Solid  State Chem., Spectroc. Acta A-Molec. Biomolec. Spectr., Physica Status Solidi B: Basic Solid  State Physics, J. Phys. Chem. Solids, Journal of Rare Earths, Biopolymers, J. Electromagnetic Waves and Applications. Optical Sensors Optical Materials Integrated Opto-electronics Prize of Science and Technology of Heilongjiang province of China YungWing Award of UTC (USA) for Science, Technology and Education Excellent PhD Dissertation Excellent PhD Dissertation Wen-Bao Sun, Xiao-Fei Yang, Zi-Bo Zhang, Wing-Han Wong, Dao-Yin Yu, Edwin Yue-Bun Pun and De-Long Zhang, Optical damage resistant Ti-diffused Zr/Er-codoped lithium niobate strip waveguide for high-power 980 nm pumping, Optics Express, Vol. 25, No. 8, pp. 8653-8658, Apr 2017..2019 Xiao-Fei Yang, Zi-Bo Zhang, Wan-Ying Du, Qun Zhang, Wing-Han Wong, Dao-Yin Yu, Edwin Yue-Bun Pun and De-Long Zhang, Polarization-insensitive, shallow Ti-diffused near-stoichiometric LiTaO3 strip waveguide for integrated optics, Optics Letters, Vol. 41, No. 11, pp. 2513-2516, Jun 2016..2019 De-Long Zhang, Qun Zhang, Jian Kang, Wing-Han Wong, Dao-Yin Yu and Edwin Yue-Bun Pun, Thermodynamic study on diffusion growth of Ga3+-doped LiNbO3 single crystal thin film for photonic application, Crystal Growth & Design, Vol. 16, No. 3, pp. 1300-1305, Jan 2016..2019 De-Long Zhang, Xiao-Fei Yang, Qun Zhang, Wing-Han Wong, Dao-Yin Yu and Edwin Yue-Bun Pun, Near-stoichiometric Ti-diffused LiNbO3 strip waveguide doped with Zr4+, Optics Letters, Vol. 40, No. 22, pp. 5307-5310, Nov 2015..2019 De-Long Zhang, Jian Kang, Wing-Han Wong, Dao-Yin Yu and Edwin Yue-Bun Pun, Electro-optically tunable super-broadband filter based on long period grating in Ti:LiNbO3 waveguide, Optics Letters, Vol. 40, No. 20, pp. 4715-4718, Oct 2015..2019 De-Long Zhang, Qun Zhang, Cong-Xian Qiu, Wing-Han Wong, Dao-Yin Yu and Edwin Yue-Bun Pun, Diffusion control of an ion by another in LiNbO3 and LiTaO3 crystals, Scientific Reports, Vol. 5, Art. No. 10018, pp. 1-9, May 2015..2019 De-Long Zhang, Cong-Xian Qiu, Ping-Rang Hua, Dao-Yin Yu, and Edwin Yue-Bun Pun, Influence of factors on growth of Er3+/Tm3+-codoped LiNbO3 crystal by Er3+/Tm3+ co-diffusion, Crystal Growth & Design, Vol. 13, No. 12, pp. 5316-5323, Dec 2013..2019 De-Long Zhang, Cong-Xian Qiu, Wing-Han Wong, Dao-Yin Yu, and Edwin Yue-Bun Pun, Relation of refractive index change to Ti-concentration in Ti-diffused LiNbO3 waveguide doped with Sc3+, Journal of Lightwave Technology, Vol. 32, No. 15, pp. 2666-2670, Aug 2014..2019 De-Long Zhang, Fang Han, Bei Chen, Dao-Yin Yu, and Edwin Yue-Bun Pun, Optical-damage-resistant highly Er3+-doped Ti:Er:LiNbO3 strip waveguide, Journal of Lightwave Technology, Vol. 32, No. 1, pp. 135-140, Jan 2014..2019 De-Long Zhang, Bei Chen, Dao-Yin Yu, and Edwin Yue-Bun Pun, Influence of factors on growth of off-congruent LiNbO3 single-crystal by Li-rich/Li-poor chemical vapor transport equilibration, Crystal Growth & Design, Vol. 13, No. 4, pp. 1793-1798, Apr 2013..2019 Shuai Ren, Xiao-Fei Yang, Zi-Bo Zhang, Wing-Han Wong, Dao-Yin Yu, Edwin Yue-Bun Pun and De-Long Zhang, Crystalline phase, Ga3+ concentration profile, and optical properties of Ga3+-diffused lithium tantalate waveguide, Materials Letters, Vol. 213, pp. 79-83,2018..2019 Jia-Qi Xu, Quan-Zhou Zhao, Wing-Han Wong, Dao-Yin Yu, Edwin Yue-Bun Pun and De-Long Zhang, Cascaded photonic crystals in Ti-diffused LiNbO3 strip waveguide, Materials Letters, Vol. 202, pp. 150-153, Sep 2017..2019 Xiao-Fei Yang, Zi-Bo Zhang, Wing-Han Wong, Dao-Yin Yu, Edwin Yue-Bun Pun and De-Long Zhang, Refractive index change in Ti-diffused near-stoichiometric LiTaO3 waveguide and its relation to Ti-concentration, Materials Chemistry and Physics, Vol. 203, pp. 340-345, Jan 2018..2019 Wan-Ying Du, Zi-Bo Zhang, Shuai Ren, Wing-Han Wong, Dao-Yin Yu, Edwin Yue-Bun Pun and De-Long Zhang, Electro-optic property of Mg2+/Er3+-codoped LiNbO3 crystal: Mg2+ concentration threshold effect, Journal of the American Ceramic Society, Vol. 100, No. 1, pp. 286-292, Jan 2017..2019 Wen-Bao Sun, Zi-Bo Zhang, Wing-Han Wong, Dao-Yin Yu, Edwin Yue-Bun Pun and De-Long Zhang, Crystalline phase, profile characteristics and spectroscopic properties of Er3+/Tm3+-diffusion-codoped LiNbO3 crystal, Journal of Luminescence, Vol. 184, pp. 191-198, Apr 2017..2019 Ning Yuan, Hong-Xue Sun, Dan-Dan Ju, Da-Yu Liu, Zi-Bo Zhang, Wing-Han Wong, Feng Song, Dao-Yin Yu, Edwin Yue-Bun Pun and De-Long Zhang, A simple, compact, low-cost, highly efficient thermometer based on green fluorescence of Er3+/Yb3+-codoped NaYF4 microcrystals, Materials Science & Engineering C-Materials for Biological Applications, Vol. 81, pp. 177-181, Dec 2017..2019 Hong-Xue Sun, Ning Yuan, Zi-Bo, Zhang, Qi Sun, Yan Wang, Wing-Han Wong, Chao-Yang Tu, Dao-Yin Yu, Edwin Yue-Bun Pun and De-Long Zhang, Temperature characteristics of green upconversion emissions of Er:SrGdGa3O7 crystal for optical temperature sensing, Journal of Luminescence, Vol. 192, pp. 231-236, Dec 2017..2019 Hong-Xue Sun, Ning Yuan, Da-Yu Liu, Zi-Bo, Zhang, Yan Wang, Wing-Han Wong, Chao-Yang Tu, Dao-Yin Yu, Edwin Yue-Bun Pun and De-Long Zhang, A simple, low-cost, highly efficient temperature sensor based on down-conversion green fluorescence of Er3+:SrGdGa3O7 crystal, Materials Research Bulletin, Vol. 94, pp. 408-414, Oct 2017..2019 Xiao-Fei Yang, Zi-Bo Zhang, Wan-Ying Du, Qun Zhang, Wing-Han Wong, Dao-Yin Yu, Edwin Yue-Bun Pun and De-Long Zhang, Composition, surface morphology, optical properties and Ti profile characteristics of Ti-diffused LiTaO3 strip waveguide, Journal of Alloys and Compounds, Vol. 695, pp. 2519-2524, Feb 2017..2019 Quan-Zhou Zhao, Zi-Bo Zhang, Jia-Qi Xu, Wing-Han Wong, Dao-Yin Yu, Edwin Yue-Bun Pun and De-Long Zhang, Hole geometry effect on stop-band characteristics of photonic crystal in Ti-diffused LiNbO3 waveguide, Materials Chemistry and Physics, vol. 186, pp. 498–504, Jan 2017..2019 Ning Yuan, Hong-Xue Sun, Zi-Bo, Zhang, Wing-Han Wong, Dao-Yin Yu, Edwin Yue-Bun Pun and De-Long Zhang, Performance improvement of temperature sensor based on rare-earth ion fluorescence by using KBr-diluted phosphor, Materials Letters, vol. 185, pp. 573–575, Dec 2016..2019 Wan-Ying Du, Zi-Bo Zhang, Shuai Ren, Wing-Han Wong, Dao-Yin Yu, Edwin Yue-Bun Pun and De-Long Zhang, Electro-optic property of Er3+-doped LiNbO3 single crystal for integrated optics, IEEE Photonics Technology Letters, Vol. 28, No. 22, pp. 2503-2506, Nov 2016..2019 Xiao-Fei Yang, Zi-Bo Zhang, Wan-Ying Du, Qun Zhang, Wing-Han Wong, Dao-Yin Yu, Edwin Yue-Bun Pun and De-Long Zhang, Near-stoichiometric Ti:Sc:LiNbO3 strip waveguide for integrated optics, Optical Materials Express, Vol. 6, No. 8, pp. 2638-2643, Aug 2016..2019 Wan-Ying Du, Zi-Bo Zhang, Jia-Qi Xu, Wing-Han Wong, Dao-Yin Yu, Edwin Yue-Bun Pun and De-Long Zhang, Electro-optic property of Ti4+-doped LiNbO3 single crystals, Optical Materials Express, Vol. 6, No. 8, pp. 2593-2599, Aug 2016..2019 De-Long Zhang, Qun Zhang, Pei Zhang, Jian Kang, Wing-Han Wong, Dao-Yin Yu and Edwin Yue-Bun Pun, Diffusivity, solubility and thermodynamic modeling of diffusion growth of Ga3+-doped LiTaO3 thin film for integrated optics, Journal of Chemical Thermodynamics, Vol. 97, pp. 93-99, Jun 2016..2019 Ning Yuan, Hong-Xue Sun, Wing-Han Wong, Dao-Yin Yu, Edwin Yue-Bun Pun and De-Long Zhang, Optical temperature sensor based on green fluorescence of Er2O3•3Nb2O5 phosphor, IEEE Photonics Technology Letters, Vol. 28, No. 7, pp. 806-809, Apr 2016..2019 De-Long Zhang, Qun Zhang, Wing-Han Wong and Edwin Yue-Bun Pun, Er3+ diffusion in LiTaO3 crystal, Applied Surface Science, Vol. 357, pp. 1097-1103, Dec 2015..2019 Jian Kang, Wing-Han Wong, Edwin Yue-Bun Pun and De-Long Zhang, Electro-optic long period grating based on Ti:LiNbO3 optical waveguide, IEEE Photonics Technology Letters, Vol. 27, No. 24, pp. 2555-2558, Dec 2015..2019 De-Long Zhang, Wen-Bao Sun, Wing-Han Wong and Edwin Yue-Bun Pun, Emission and Absorption Cross Sections of Er3+:LiNbO3 Crystal: Composition Effect, Optical Materials Express, Vol. 5, No. 9, 1920-1926, Sep 2015..2019 De-Long Zhang, Jian Kang, Qun Zhang, W. J. Du, W. H. Wong, and E. Y. B. Pun, Zirconium-diffusion-doped Ti:LiNbO3 strip waveguide for integrated optics, Optical Materials Express, Vol. 5, No. 8, pp. 1715-1721, Aug 2015..2019 De-Long Zhang, Qun Zhang, Wing-Han Wong, Dao-Yin Yu and Edwin Yue-Bun Pun, Control of Er3+ diffusion by co-diffused Ti4+ in LiNbO3 crystal, Materials Research Bulletin, Vol. 67, pp. 126 -133, Jul 2015..2019 De-Long Zhang, Qun Zhang, Cong-Xian Qiu, Wing-Han Wong and Edwin Yue-Bun Pun, Control of Scandium Diffusion in LiNbO3 Single Crystal by Co-diffusion of Titanium, Journal of Materials Science, Vol. 50, No. 12, pp. 4149–4159, Jun 2015..2019 De-Long Zhang, Jian Kang, Cong-Xian Qiu, Qun Zhang, Wing-Han Wong and Edwin Yue-Bun Pun, Refractive Index in Ti:LiNbO3 Fabricated by Ti Diffusion and Post-Li-rich VTE, IEEE Photonics Technology Letters, Vol. 27, No. 10, pp. 1132-1135, May 2015..2019 De-Long Zhang, Cong-Xian Qiu, Wen-Jie Du, Wing-Han Wong and Edwin Yue-Bun Pun, Zr4+/Ti4+ Co-diffusion Characteristics in Lithium Niobate, Journal of the American Ceramic Society, Vol. 98, No. 2, pp. 567-573, Feb 2015..2019 De-Long Zhang, Cong-Xian Qiu, Wing-Han Wong and Edwin Yue-Bun Pun, Relationship between refractive index increase and Ti4+ concentration in Ti:LiNbO3 waveguide fabricated by Ti4+ diffusion in near-stoichiometric LiNbO3 substrate, Materials Research Bulletin, Vol. 60, pp. 771-777, Dec 2014..2019 De-Long Zhang, Qun Zhang, Cong-Xian Qiu, Wing-Han Wong and Edwin Yue-Bun Pun, Zr4+ diffusion-doping effect on refractive index of LiNbO3: A comparison with bulk-doping case, Optical Materials Express, Vol. 4, No. 10, pp. 2215-2220, Oct 2014..2019 De-Long Zhang, Cong-Xian Qiu, Wing-Han Wong, Dao-Yin Yu, and Edwin Yue-Bun Pun, Optical-damage-resistant Ti-diffused LiNbO3 strip waveguide doped with scandium, IEEE Photonics Technology Letters, Vol. 26, No. 17, pp. 1770-1773, Sep 2014..2019 De-Long Zhang, Cong-Xian Qiu, Wing-Han Wong, and Edwin Yue-Bun Pun, Diffusion properties of scandium in lithium niobate crystal, Journal of the American Ceramic Society, Vol. 97, No. 9, pp. 2903-2908, Sep 2014..2019 De-Long Zhang, Zhi-Pei Hou, Fang Han, Ping-Rang Hua, Dao-Yin Yu, and Edwin Yue-Bun Pun, Er3+ upconversion fluorescence of ErNbO4 phosphor for optical temperature sensing, IEEE Photonics Technology Letters, Vol. 26, No. 16, pp. 1601-1604, Aug 2014..2019 De-Long Zhang, Zhi-Pei Hou, Fang Han, Ping-Rang Hua, Dao-Yin Yu and Edwin Yue-Bun Pun, 2.7 µm emission of Er3+-doped LiNbO3 crystals and its thermal effect, Laser Physics Letters, Vol. 11, No. 4, art no. 046101, Apr 2014..2019 De-Long Zhang, Zhi-Bei Hou, Ping-Rang Hua, Dao-Yin Yu, and Edwin Yue-Bun Pun, Synthesis and Er3+ upconversion emission characteristics of calcined Er2O3-MgO-Nb2O5 phosphors for temperature sensing, Science of Advanced Materials, Vol. 6, No. 4, pp. 674-683, Apr 2014..2017 De-Long Zhang, Cong-Xian Qiu, Fang Han, Bei Chen, Dao-Yin Yu, and Edwin Yue-Bun Pun, Ti:Er:LiNbO3 strip waveguide with high diffusion-doped Er3+ concentration, IEEE Photonics Technology Letters, Vol. 26, No. 5, pp. 524-527, Mar 2014..2019 De-Long Zhang, Wen-Jie Du, Jian Gao, Dao-Yin Yu and Edwin Yue-Bun Pun, High-temperature fluxing salt of LiNbO3 single-crystal by potassium meta-phosphate solvent, Materials Chemistry and Physics, Vol. 143, No. 1, pp. 434-439, Dec 2013..2019 De-Long Zhang, Cong-Xian Qiu, Wen-Zhu Zhang, Ping-Rang Hua, Dao-Yin Yu, and Edwin Yue-Bun Pun, Er3+/Tm3+ co-diffusion characteristics in LiNbO3 crystal, Journal of the American Ceramic Society, Vol. 96, No. 11, pp. 3476-3482, Nov 2013..2019 De-Long Zhang, Cong-Xian Qiu, Wen-Zhu Zhang, Ping-Rang Hua, Dao-Yin Yu, and Edwin Yue-Bun Pun, Diffusion characteristics of Zr4+ in LiNbO3 single-crystal, Journal of the American Ceramic Society, Vol. 96, No. 9, pp. 2722-2724, Sep 2013..2019 De-Long Zhang, Na Dong, Ping-Rang Hua, Dao-Yin Yu, and Edwin Yue-Bun Pun, Synthesis and Er3+ spectroscopic properties study of Er2O3•3Nb2O5 phosphor for temperature sensing, Science of Advanced Materials, Vol. 5, No. 3, pp. 267-275, 2013..2019 De-Long Zhang, Fang Han, Shi-Yu Xu, Bei Chen, Ping-Rang Hua, Dao-Yin Yu, and Edwin Yue-Bun Pun, Relation of refractive index to Ti-concentration in near-stoichiometric Ti:LiNbO3 waveguide, IEEE Photonics Technology Letters, Vol. 25, No. 17, pp. 1653-1655, Sep 2013..2019 De-Long Zhang, Fang Han, Ping-Rang Hua, Liang Sun, Dao-Yin Yu, and Edwin Yue-Bun Pun, Relationship between refractive index change and Ti concentration in bulk Ti-doped LiNbO3 crystal, IEEE Photonics Journal, Vol. 5, No. 3, Art. No. 2201706 (1-6), Jun 2013..2019 Ping-Rang Hua, Edwin Yue-Bun Pun, Dao-Yin Yu and De-Long Zhang, Non-periodic oscillation with wavelength of mode guided in a special Ti-diffused LiNbO3 waveguide structure, IEEE Photonics Journal, Vol. 5, No. 4, Art. No. 2202307 (1-8), Aug 2013..2019 De-Long Zhang, Bei Chen, Ping-Rang Hua, Dao-Yin Yu, and Edwin Yue-Bun Pun, Thermodynamic study on Li-poor chemical vapor transport equilibration in MgO-doped LiNbO3 crystal, Materials Chemistry and Physics, Vol. 139, No. 2-3, pp. 811-816, May 2013..2019 De-Long Zhang, Wen-Zhu Zhang, Ping-Rang Hua, Dao-Yin Yu, and Edwin Yue-Bun Pun, Diffusion properties of Tm3+ in congruent LiNbO3 crystal, Journal of the American Ceramic Society, Vol. 96, No. 5, pp. 1538-1545, May 2013..2019 De-Long Zhang, Bei Chen, Zhi-Pei Hou, Ping-Rang Hua and Edwin Yue-Bun Pun, Emission and absorption cross sections at 810 and 860 nm bands of Er3+ in LiNbO3 crystal, Journal of the American Ceramic Society, Vol. 96, No. 1, pp. 191-196, Jan 2013..2019 De-Long Zhang, Jian Gao, Ping-Rang Hua, Dao-Yin Yu and Edwin Yue-Bun Pun, Appropriate solvent NaVO3 for composition analysis of LiNbO3 crystal using chemical method, Analytical Chemistry, Vol. 85, No. 3, pp. 1940-1944, Feb 2013..2019 De-Long Zhang, Shuai Zhang, Ping-Rang Hua, Dao-Yin Yu and Edwin Yue-Bun Pun, A Theoretical study on special Ti : LiNbO3 structure of an array of strip waveguides embedded in a planar waveguide, Journal of Lightwave Technology, Vol. 30, No. 23, pp. 3653-3659, Dec 2012..2019 教育经历 1986.9-1989.6 Tianjin Normal University   Theoretical Physics   Master of Science 1982.9-1986.6 Tianjin Normal University   Theoretical Physics   Bachelor of Science 1990.9-1994.6 Nankai University   Physics of Condensed Matters   PhD 工作经历 2001.7 -2017.11 |School of Precision Instruments and Opto-electronics Engineering|Tianjin University|Professor 1996.12 -2001.6 |School of Precision Instruments and Opto-electronics Engineering|Tianjin University|Associate Professor 1994.7 -1996.11 |School of Precision Instruments and Opto-electronics Engineering|Tianjin University|Lecturer 2017.7 -2017.9 |Department of Electronic Engineering|City University of Hong Kong|Research Fellow 2016.7 -2016.9 |Department of Electronic Engineering|City University of Hong Kong|Senior Research Associate 2015.7 -2015.9 |Department of Electronic Engineering|City University of Hong Kong|Senior Research Associate 2014.7 -2014.9 |Department of Electronic Engineering|City University of Hong Kong|Senior Research Associate 2013.7 -2013.9 |Department of Electronic Engineering|City University of Hong Kong|Senior Research Associate 2012.7 -2012.9 |Department of Electronic Engineering|City University of Hong Kong|Senior Research Associate 2011.7 -2011.9 |Department of Electronic Engineering|City University of Hong Kong|Senior Research Associate 2010.7 -2010.9 |Department of Electronic Engineering|City University of Hong Kong|Senior Research Associate 2009.7 -2009.9 |Department of Electronic Engineering|City University of Hong Kong|Senior Research Associate 2008.11 -2009.2 |Department of Electronic Engineering|City University of Hong Kong|Senior Research Associate 2008.7 -2008.9 |Department of Electronic Engineering|City University of Hong Kong|Senior Research Associate 2007.11 -2008.2 |Department of Electronic Engineering|City University of Hong Kong|Senior Research Associate 2006.11 -2007.3 |Department of Electronic Engineering|City University of Hong Kong|Senior Research Associate 2005.7 -2005.10 |Department of Electronic Engineering|City University of Hong Kong|Senior Research Associate 2004.7 -2004.10 |Department of Electronic Engineering|City University of Hong Kong|Research Associate 2003.11 -2004.2 |Department of Electronic Engineering|City University of Hong Kong|Research Associate 2001.7 -2002.6 |Department of Electronic Engineering|City University of Hong Kong|Research Fellow 2001.4 -2001.5 |Department of Applied Physics|University of Paderborn|Visiting Scholar