摘要We report an improved theoretical model to characterize terahertz electro-optic (EO) sampling detection operating at near crossed-polarizer design by considering the nonzero minimal transmission of polarizers and the polarization purity of laser beam. The proof-of-concept experiments show that the model can give quiet reasonable explanations on many experimental phenomena in THz EO detection, e.g. the modulation depth vs the different optical biases, the noise level from the balance detector vs the input probe beam power, the main origin of the background light and the incomplete cancellation of noise from the laser intensity fluctuation in balanced detection. The terahertz signals and the noises are also measured based on two different EO sampling schemes for comparison. The measured results support our model very well.
Abstract：We report an improved theoretical model to characterize terahertz electro-optic (EO) sampling detection operating at near crossed-polarizer design by considering the nonzero minimal transmission of polarizers and the polarization purity of laser beam. The proof-of-concept experiments show that the model can give quiet reasonable explanations on many experimental phenomena in THz EO detection, e.g. the modulation depth vs the different optical biases, the noise level from the balance detector vs the input probe beam power, the main origin of the background light and the incomplete cancellation of noise from the laser intensity fluctuation in balanced detection. The terahertz signals and the noises are also measured based on two different EO sampling schemes for comparison. The measured results support our model very well.
收稿日期: 2007-07-20
出版日期: 2007-12-27
引用本文:
XU Shi-Xiang;CAI Hua. A Theoretical and Experimental Research on Terahertz Electro-Optic Sampling at Near-Zero Optical Transmission Point[J]. 中国物理快报, 2008, 25(1): 152-155.
XU Shi-Xiang, CAI Hua. A Theoretical and Experimental Research on Terahertz Electro-Optic Sampling at Near-Zero Optical Transmission Point. Chin. Phys. Lett., 2008, 25(1): 152-155.
[1] Ferguson B and Zhang X C 2002 Nature Mater. 1 26 [2] Mittleman D M, Gupta M, Neelamani R, Baraniuk R G., Rudd J V, andKoch M 1999 Appl. Phys. B 68 1085 [3] Gallot G. and Grischkowsky D 1999 J. Opt. Soc. Amer. B 16 1204 [4] Bakker H J, Cho G C and Kurz H 1998 J. Opt. Soc. Am. B 15 1795 [5] Kampfrath T, N\"otzold J and Wolf M 2007 Appl. Phys.Lett. 90 231113 [6] Chen Q, Tani M, Jiang Z and Zhang X C 2001 J. Opt. Soc.Am. B 18 823 [7] Sun F G, Jiang Z, Zhang X C 1998 Appl. Phys. Lett. 73 2233 [8] Bartels A., Thoma A, Janke C, Dekorsy T, Dreyhaupt A, Winner S andHelm M 2006 Opt. Express 14 430 [9] Grebenev V and Bartels L 2003 Appl. Opt. 24 1721 [10] Jiang Z P, Sun F G., Chen Q, and Zhang X C 1999 Appl.Phys. Lett. 74 1191 [11] Jiang Z P and Zhang X C 1999 IEEE Trans. MicrowaveTheor. Technol. 47 2644 [12] Hattori T, Ohta K, Rungsawang R and Tukamoto K 2004 J.Phys. D: Appl. Phys. 37 770 [13] Zhang J M, Ruo R L and Jackson M K 1999 Appl. Phys.Lett. 75 3446
2008, Vol. 25 
