13 August 1997 Two-dimensional periodic grating light coupling in quantum well infrared photodetectors
Author Affiliations +
Abstract
Quantum well infrared photodetectors do not respond to normal incident light due to the quantum mechanical selection rules associated with intersubband transitions. Thus alternate light coupling systems, such as gratings are required in order to deflect the incoming light away from the normal. The resolution of the photolithography and accuracy of the etching become key issues in producing smaller grating feature sizes especially in shorter wavelengths. An enhancement factor of three due to 2D periodic grating fabricated on a QWIP structure was observed. Variation of the enhancement factor with groove depth and feature size of the grating can be theoretically explained.
© (1997) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Sumith V. Bandara, Sarath D. Gunapala, John K. Liu, Winn Hong, Jin Suk Park, "Two-dimensional periodic grating light coupling in quantum well infrared photodetectors", Proc. SPIE 3061, Infrared Technology and Applications XXIII, (13 August 1997); doi: 10.1117/12.280394; https://doi.org/10.1117/12.280394
PROCEEDINGS
6 PAGES


SHARE
RELATED CONTENT

8 to 9 um and 14 to 15...
Proceedings of SPIE (July 26 1999)
Long-wavelength 256x256 QWIP handheld camera
Proceedings of SPIE (June 17 1996)
QWIP research and development of 320 x 256 QWIP arrays...
Proceedings of SPIE (August 13 1997)
Processing and characterization of a 128 x 128 GaAs GaAlAs...
Proceedings of SPIE (September 01 1995)
Long wavelength 640 x 484 GaAs AlxGa1 xAs quantum well...
Proceedings of SPIE (August 13 1997)

Back to Top