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We propose a resonant-cavity-enhanced subwavelength metal–semiconductor–metal structure for efficient and ultrafast photodetection. A Fabry–Pérot cavity is composed by a bottom multilayer Bragg reflector and a top subwavelength metallic grating. The structure was fabricated on a GaAs substrate with 75 nm finger width and finger spacing, and theoretical results were validated experimentally by reflection spectra and photocurrent measurements. 75% efficiency is predicted theoretically in a 40-nm-thick GaAs layer, leading to potential cutoff frequencies between 300 and 500 GHz in TE polarization. © 2003 American Institute of Physics.
Published in:
Applied Physics Letters
(Volume:83
,
Issue:
8
)
Date of Publication: Aug 2003
- Page(s):
- 1521 - 1523
- ISSN :
- 0003-6951
- Digital Object Identifier :
- 10.1063/1.1604942
- Product Type:
- Journals & Magazines
- Date of Current Version :
- 18 June 2009
- Issue Date :
- Aug 2003
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