Share Email Print
cover

Proceedings Paper

Two-dimensional periodic grating light coupling in quantum well infrared photodetectors
Author(s): Sumith V. Bandara; Sarath D. Gunapala; John K. Liu; Winn Hong; Jin Suk Park
Format Member Price Non-Member Price
PDF $14.40 $18.00

Paper 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.

Paper Details

Date Published: 13 August 1997
PDF: 6 pages
Proc. SPIE 3061, Infrared Technology and Applications XXIII, (13 August 1997); doi: 10.1117/12.280394
Show Author Affiliations
Sumith V. Bandara, Jet Propulsion Lab. (United States)
Sarath D. Gunapala, Jet Propulsion Lab. (United States)
John K. Liu, Jet Propulsion Lab. (United States)
Winn Hong, Jet Propulsion Lab. (United States)
Jin Suk Park, Jet Propulsion Lab. (United States)


Published in SPIE Proceedings Vol. 3061:
Infrared Technology and Applications XXIII
Bjorn F. Andresen; Marija Strojnik, Editor(s)

© SPIE. Terms of Use
Back to Top