Title :
120-GHz long-wavelength low-capacitance photodetector with an air-bridged coplanar metal waveguide
Author :
Tan, I-Hsing ; Sun, Chi-Kuang ; Giboney, Kirk S. ; Bowers, John E. ; Hu, Evelyn L. ; Miller, B.I. ; Capik, R.J.
Author_Institution :
Dept. of Electr. & Comput. Eng., California Univ., Santa Barbara, CA, USA
Abstract :
We demonstrate a long-wavelength detector structure using an undercut mesa and an air-bridged coplanar metal waveguide to significantly reduce both the diode RC constant and the parasitic capacitance. Record electrical bandwidths of 120 GHz are demonstrated for long-wavelength photodetectors.
Keywords :
capacitance; coplanar waveguides; infrared detectors; optical planar waveguides; optical waveguide components; photodetectors; 120 GHz; IR detectors; air-bridged coplanar metal waveguide; diode RC constant; electrical bandwidths; long-wavelength detector structure; low-capacitance photodetector; parasitic capacitance; Bandwidth; Coplanar waveguides; Detectors; Indium gallium arsenide; Indium phosphide; Optical waveguides; P-i-n diodes; Parasitic capacitance; Photodetectors; Substrates;
Journal_Title :
Photonics Technology Letters, IEEE
