Two-dimensional bi-periodic grating coupled one- and two-color quantum well infrared photodetectors

Journal Article · Wed Feb 01 00:00:00 EST 1995 · IEEE Electron Device Letters

DOI:https://doi.org/10.1109/55.386031· OSTI ID:32061

Tsai, K L; Lee, C P; Tsang, J S; Chen, H R ^[1]; Chang, K H ^[2]

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1. National Chiao Tung Univ., Hsinchu (Taiwan, Province of China)
2. Chung Cheng Inst. of Tech., Tahsi (Taiwan, Province of China) Dept. of Applied Physics

Multiple quantum well infrared photodetectors (QWIP`s) with two-dimensional bi-periodic grating couplers have been demonstrated. For one-color QWIP`s, the response linewidths of such QWIP`s are found to be much wider than those of conventional grating coupled QWIP`s. The bi-periodic gratings have also been applied to two-color QWIP`s to separately optimize the absorption at two wavelength bands. The large difference in responsivities at the two wavelength bands for devices with single period gratings can be greatly reduced with the use of bi-periodic gratings.

• OSTI ID: 32061
• Journal Information: IEEE Electron Device Letters, Vol. 16, Issue 2; Other Information: PBD: Feb 1995
• Country of Publication: United States
• Language: English

Related Subjects

44 INSTRUMENTATION
INCLUDING NUCLEAR AND PARTICLE DETECTORS
INFRARED RADIATION
RADIATION DETECTION
PHOTODETECTORS
RESPONSE FUNCTIONS
SEMICONDUCTOR MATERIALS
PERFORMANCE