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The grating optical coupling method is commonly used for detecting the normal incident light with a quantum well photodetector. In this paper, the distribution of electromagnetic field in one-dimensional metal grating terahertz quantum well photodetectors is studied with modal method, and the average light intensity in the active region is obtained. The result shows that, the light intensity in the device can be optimized when the period of the grating is comparable with the wavelength of the terahertz wave in the sample and a proper filling factor is chosen according to the device structure, which will improve the responsivity of the device.
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Keywords:
- terahertz /
- quantum well photodetector /
- grating
[1] Siegel P H 2002 IEEE Trans Microwave Theory Tech. 50 910
[2] Ferguson B, Zhang X C 2003 Physics 32 286 (in Chinese)
[3] Cao J C 2006 Physics 35 632 (in Chinese) [曹俊诚 2006 物理 35 632]
[4] Tonouchi M 2007 Nat. Photonics 1 97
[5] Köhler R, Tredicucci A, Beltram F, Beere H E, Linfield E H, Davies A G, Ritchie D A, Iotti R C, Rossi F 2002 Nature 417 156
[6] Williams B S 2007 Nat. Photonics 1 517
[7] Cao J C, Li H, Han Y J, Tan Z Y, Lue J T, Luo H, Laframboise S, Liu H C 2008 Chin. Phys. Lett. 25 953
[8] Li H, Cao J C, Han Y J, Guo X G, Tan Z Y, Lue J T, Luo H, Laframboise S R, Liu H C 2008 J. Appl. Phys. 104 043101
[9] Li H, Han Y J, Tan Z Y, Zhang R, Cao J C 2010 Acta Phys. Sin. 59 2169 (in Chinese)[黎 华、 韩英军、 谭智勇、 张 戎、 曹俊诚 2010 59 2169]
[10] Liu H C, Song C Y, SpringThorpe A J, Cao J C 2004 Appl. Phys. Lett. 84 4068
[11] Luo H, Liu H C, Song C Y, Wasilewski Z R 2005 Appl. Phys. Lett. 86 231103
[12] Graf M, Scalari G, Hofstetter D, Faist J, Beere H, Linfield E, Ritchie D, Davies G 2004 Appl. Phys. Lett. 84 475
[13] Guo X G, Tan Z Y, Cao J C, Liu H C 2009 Appl. Phys. Lett. 94 201101
[14] Tan Z Y, Cao J C, Guo X G, Han Y J, Li H 2010 Acta Phys. Sin. 59 2391 (in Chinese)[谭智勇、 曹俊诚、 郭旭光、 韩英军、 黎 华 2010 59 2391]
[15] Schneider H, Liu H C 2006 Quantum Well Infrared Photodetectors: Physics and Applications (Berlin: Springer-Verlag) p97
[16] Heitmann D, Kotthaus J P, Mohr E G 1982 Solid State Commun. 44 715
[17] Gunapala S D, Bandara S V, Liu J K, Hill C J, Rafol S B, Mumolo J M, Trinh J T, Tidrow M Z, Levan P D 2005 Proc. SPIE 5783 789
[18] Patrashin M, Hosako I 2008 Opt. Lett. 33 168
[19] Todorov Y, Minot C 2007 J. Opt. Soc. Am. A 24 3100
[20] Liu H C, Luo H, Song C Y, Wasilewski Z R, SpringThorpe A J, Cao J C 2008 IEEE J. Sel. Top. Quant. 14 374
[21] Blakemore J S 1982 J. Appl. Phys. 53 R123
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[1] Siegel P H 2002 IEEE Trans Microwave Theory Tech. 50 910
[2] Ferguson B, Zhang X C 2003 Physics 32 286 (in Chinese)
[3] Cao J C 2006 Physics 35 632 (in Chinese) [曹俊诚 2006 物理 35 632]
[4] Tonouchi M 2007 Nat. Photonics 1 97
[5] Köhler R, Tredicucci A, Beltram F, Beere H E, Linfield E H, Davies A G, Ritchie D A, Iotti R C, Rossi F 2002 Nature 417 156
[6] Williams B S 2007 Nat. Photonics 1 517
[7] Cao J C, Li H, Han Y J, Tan Z Y, Lue J T, Luo H, Laframboise S, Liu H C 2008 Chin. Phys. Lett. 25 953
[8] Li H, Cao J C, Han Y J, Guo X G, Tan Z Y, Lue J T, Luo H, Laframboise S R, Liu H C 2008 J. Appl. Phys. 104 043101
[9] Li H, Han Y J, Tan Z Y, Zhang R, Cao J C 2010 Acta Phys. Sin. 59 2169 (in Chinese)[黎 华、 韩英军、 谭智勇、 张 戎、 曹俊诚 2010 59 2169]
[10] Liu H C, Song C Y, SpringThorpe A J, Cao J C 2004 Appl. Phys. Lett. 84 4068
[11] Luo H, Liu H C, Song C Y, Wasilewski Z R 2005 Appl. Phys. Lett. 86 231103
[12] Graf M, Scalari G, Hofstetter D, Faist J, Beere H, Linfield E, Ritchie D, Davies G 2004 Appl. Phys. Lett. 84 475
[13] Guo X G, Tan Z Y, Cao J C, Liu H C 2009 Appl. Phys. Lett. 94 201101
[14] Tan Z Y, Cao J C, Guo X G, Han Y J, Li H 2010 Acta Phys. Sin. 59 2391 (in Chinese)[谭智勇、 曹俊诚、 郭旭光、 韩英军、 黎 华 2010 59 2391]
[15] Schneider H, Liu H C 2006 Quantum Well Infrared Photodetectors: Physics and Applications (Berlin: Springer-Verlag) p97
[16] Heitmann D, Kotthaus J P, Mohr E G 1982 Solid State Commun. 44 715
[17] Gunapala S D, Bandara S V, Liu J K, Hill C J, Rafol S B, Mumolo J M, Trinh J T, Tidrow M Z, Levan P D 2005 Proc. SPIE 5783 789
[18] Patrashin M, Hosako I 2008 Opt. Lett. 33 168
[19] Todorov Y, Minot C 2007 J. Opt. Soc. Am. A 24 3100
[20] Liu H C, Luo H, Song C Y, Wasilewski Z R, SpringThorpe A J, Cao J C 2008 IEEE J. Sel. Top. Quant. 14 374
[21] Blakemore J S 1982 J. Appl. Phys. 53 R123
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