Published April 2012
| Version v1
Journal article
Coupling efficiency of lamellar gratings for terahertz quantum-well photodetectors
Creators
- 1. Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai (China)
Description
One-dimensional (1D) etched gratings coated with a perfect metal are used to couple light into terahertz (THz) quantum-well photodetectors (QWPs). The coupling efficiencies of these reflective gratings are simulated by using the finite element method (FEM). The results show that simple optics arguments used in the design of gratings for quantum well infrared detectors (QWIPs) are not suitable in the THz region. The near-field effect is important in the coupling, and a 'standing-wave effect' is found in the grating stripes. Optimizations of the gratings are also discussed.
Additional details
Publishing Information
- Journal Title
- Journal of the Korean Physical Society
- Journal Volume
- 60
- Journal Issue
- 8
- Series
- 17 refs, 7 figs
- Journal Page Range
- p. 1233-1237
- ISSN
- 0374-4884
INIS
- Country of Publication
- Korea, Republic of
- Country of Input or Organization
- Korea, Republic of
- INIS RN
- 45050628
- Subject category
- S71: CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS;
- Descriptors DEI
- COMPUTERIZED SIMULATION; COUPLING; EFFICIENCY; FINITE ELEMENT METHOD; GALLIUM ARSENIDES; GRATINGS; LAMELLAE; PHOTODETECTORS; QUANTUM WELLS; THZ RANGE
- Descriptors DEC
- ARSENIC COMPOUNDS; ARSENIDES; CALCULATION METHODS; FREQUENCY RANGE; GALLIUM COMPOUNDS; MATHEMATICAL SOLUTIONS; NANOSTRUCTURES; NUMERICAL SOLUTION; PNICTIDES; SIMULATION