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標題: Nonlinearity of microwave-induced photovoltage and photocurrent of two-dimensional electron systems and mesoscopic structures.
作者: 張哲瑋
Chang, Che-Wei
關鍵字: 2DES
出版社: 物理學系所
引用: [1] D. K. Cheng “Field and Wave Electromagnetics” 2nd Edition, Addison-Wesley Publishing Company, Inc. (1989) [2] V. I. Fal'ko, Europhys. Lett. 8(8), 785 (1989) [3] V. I. Fal'ko, and D. E. Khmel'nitskii, Zh. Eksp. Teor. Fiz. 95, 328(1989) [Sov. Phys. JETP 68, 186 (1989)] [4] J. Liu, M. A. Pennington, and N. Giordano, Phys. Rev. B 45, 1267 (1992) [5] J. J. Lin, R. E. Bartolo, and N. Giordano, Phys. Rev. B 45, 14231 (1992) [6] L. DiCarlo, C. M. Marcus, and J. S. Harris, Phys. Rev. Lett. 91 246804 (2003) [7] K. von Klitzing, G. Dorda, and M. Pepper, Phys. Rev. Lett. 45, 494 (1980). [8] M. A. Zudov, R. R. Du, J. A. Simmons, and J. L. Reno, Phys. Rev. B 64, 201311 (2001). [9] C. Kittel “Introduction to Solid State Physics” Eighth Edition, John Wiely, and Sons, Inc. (2005) [10] A. N. Khondker, and Muhammad A. Alam, Phys. Rev. B 44, 5444 (1991) [11] R. E. Bartolo, N. Giordano, X. Huang, and G. H. Bernstein, Phys. Rev. B 55, 2384 (1997) [12] L. Angers, A. Chepelianskii, R. Deblock, B. Reulet, and H. Bouchiat, Phys. Rev. B 76, 075331(2007) [13] I. Kasalynas, and L. Subacius, Appl. Phys. Lett. 89, 152104(2006) [14] U. Sivan, P. M. Solomon, and H. Shrikman, Phys. Rev. Lett. 68, 1196(1992) [15] C. Skierbiszewski, K. Dybko, W. Knap, M. Siekacz, W. Krupczynski, G. Nowak, and M. Bockowski, Appl. Phys. Lett. 86, 102106(2005) [16] J. A. Keogh, K. Das Gupta, H. E. Beere, D. A. Ritchie, and M. Pepper, Appl. Phys. Lett. 87, 202104(2005) [17] A. M. M. Omer, S. Adhikari, S. Adhikary, H. Uchida, and M. Umeno, Appl. Phys. Lett. 87, 161912(2005) [18] M. Moskalets, and M. Buttiker, Phys. Rev. B 69, 205316(2004) [19] Y. Q. Tang, B. Shen, X. W. He, K. Han, N. Tang, W. H. Chen, Z. J. Yang, G. Y. Zhang, Y. H. Chen, C. G. Tang, Z. G. Wang, K. S. Cho, and Y. F. Chen, Appl. Phys. Lett. 91, 071920(2007) [20] F. Pierre, A. B. Gougam, A. Anthore, H. Pothier, D. Esteve, and N. O. Birge, Phys. Rev. B 68, 085413(2003) [21] E. Tutuc, M. Shayegan, and D. A. Huse, Phys. Rev. Lett. 93, 036802(2004) [22] M. G. Vavilov, and A. D. Stone, Phys. Rev. Lett. 97, 216801(2006) [23] R. E. Bartolo, and N. Giordano, Phys. Rev. Lett. 54, 3571(1996) [24] L. Angers, E. Z. Bajjani, R. Deblock, S. Gueron, H. Bouchiat, A. Cavanna, and U. Gennser, Phys. Rev. B 75, 115309(2007) [25] M. G. Vavilov, V. Ambegaokar and I. L. Aleiner, Phys. Rev. B 63, 195313(2001)
摘要: 我們在調變參雜GaAs/AlGaAs異質結構的二維電子系統上製作了寬度分別為50 μm、1 μm、5 μm的窄通道,在高頻微波照射下,產生一交流電場Eac作用於元件上,測量接點間的感應光電壓( VP )及光電流( IP )。在本實驗中,我們觀察不同寬度的窄通道在溫度1.4 K和4 K,及不同的磁場下,改變頻率( 500 MHz ~ 15 GHz )及微波強度( -39 ~ 10 dBm ),比較感應光電壓及光電流傳輸特性。在磁場B = 0 T下,隨著微波強度增強( -19 ~ 10 dBm )觀察到感應光電壓及光電流以非線性方式增減的現象,且在不同位置的微波天線下都有此現象。在較微弱的微波強度( -27 dBm )以下,與理論IP正比於Eac2相符合,並且在 ±3 ( Tesla )下分析反對稱與對稱性的現象,可以看出對稱性現象是由磁場的改變所造成的電阻變化為主要因素,而影響反對稱性現象則更為複雜。
In this work, we investigate microwave-induced current and voltage of mesoscopic two-dimensional electron systems embedded in the GaAs/AlGaAs heterostructure under various magnetic fields (B). The width of the mesoscopic channels are 50 μm、1 μm、5 μm. The frequency (f) range of the microwave is 500 MHz ~ 15 GHz with power –39 dBm ~10dBm. In the high power range (> -19 dBm), the behavior of the photocurrent (IP) and the photovoltage (VP) are very nonlinear at B = 0. However, we find that IP is proportional to the square of the ac electric field (Eac) in the low amplitude range (< -27 dBm). We also find that VP and IP have maximum at f = 4 GHz. By analyzing the magnetic-field-dependent data between -3 and 3 T, we can conclude that the field-symmetric part of the photocurrent is due to the variation of resistance caused by the change of the magnetic field.
其他識別: U0005-2308200802154300
Appears in Collections:物理學系所



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