| CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES |
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Dielectric Properties of GaN in THz Frequencies |
| FANG He-Nan1, ZHANG Rong1, LIU Bin1, LU Hai1, DING Jian-Ping1, XIE Zi-Li1, XIU Xiang-Qian1, ZHENG You-Dou1, XIAO Ming-Wen2, ZHANG Cai-Hong3, CHEN Jian3, WU Pei-Heng3 |
| 1Jiangsu Provincial Key Laboratory of Advanced Photonic and Electronic Materials and Department of Physics, Nanjing University, Nanjing 2100932Department of Physics, Nanjing University, Nanjing 2100933Department of Electronic Science and Engineering, Nanjing University, Nanjing 210093 |
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| Cite this article: |
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FANG He-Nan, ZHANG Rong, LIU Bin et al 2010 Chin. Phys. Lett. 27 017802 |
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Abstract The complex refractive indices and the dielectric function of GaN for frequencies ranging from 0.25 to 1.22THz are obtained using THz time-domain spectroscopy. The real part of the dielectric function first decreases from 0.25 to 0.42THz and then oscillates from 0.42 to 1.22THz, whereas the imaginary part of the dielectric function is oscillating within the whole range of frequency. The simple Drude model is extended to take into account the effect of defects on the dielectric function. The extended model is in agreement with the experimental data.
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| Keywords:
78.20.Ci
78.20.Bh
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Received: 06 August 2009
Published: 30 December 2009
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| PACS: |
78.20.Ci
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(Optical constants (including refractive index, complex dielectric constant, absorption, reflection and transmission coefficients, emissivity))
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78.20.Bh
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(Theory, models, and numerical simulation)
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[1] Tonouchi M 2007 Nature Photon. 1 97
[2] Zhang W, Azad A K and Grischkowsky D 2003 Appl. Phys.Lett. 82 2841
[3] Tsai T R, Chen S J, Chang C F, Hsu S H and Lin T Y 2006 Opt. Express. 14 4898
[4] Nagashima T, Takata K, Nashima S, Harima H and Hangyo M2005 Jpn. J. Appl. Phys. 44 926
[5] Grischkowsky D et al 1990 J. Opt. Soc. Am. B 72006
[6] Komitzer K et al 1999 Phys. Rev. B 60 1471
[7] Reshchikov M A and Morkoc H 2005 J. Appl. Phys. 97 061301
[8] Mcleod H A 1969 Thin-Film Optical Filters (London:Adam Hilger LTD) p 28 |
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