Open AccessEfficient terahertz-wave generation via four-wave mixing in silicon membrane waveguides
Author(s) -
Zhaolu Wang,
Hongjun Liu,
Nan Huang,
Qibing Sun,
Jin Wen
Publication year - 2012
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.20.008920
Subject(s) - terahertz radiation , four wave mixing , optics , materials science , wavelength , silicon , waveguide , dispersion (optics) , energy conversion efficiency , optoelectronics , silicon photonics , optical pumping , nonlinear optics , laser , physics
Terahertz (THz) wave generation via four-wave mixing (FWM) in silicon membrane waveguides is theoretically investigated with mid-infrared laser pulses. Compared with the conventional parametric amplification or wavelength conversion based on FWM in silicon waveguides, which needs a pump wavelength located in the anomalous group-velocity dispersion (GVD) regime to realize broad phase matching, the pump wavelength located in the normal GVD regime is required to realize collinear phase matching for the THz-wave generation via FWM. The pump wavelength and rib height of the silicon membrane waveguide can be tuned to obtain a broadband phase matching. Moreover, the conversion efficiency of the THz-wave generation is studied with different pump wavelengths and rib heights of the silicon membrane waveguides, and broadband THz-wave can be obtained with high efficiency exceeding 1%.