Abstract

We design an AlGaAs-based terahertz photonic crystal waveguide (PCW) to achieve terahertz-wave difference frequency generation (DFG) from near-infrared light sources. The PCW structure provides a tight confinement of terahertz-wave field, resulting in a good mode field overlap of three waves. The unique phase matching condition between two pump waves and terahertz Bloch wave can be satisfied through choosing appropriate waveguide parameters and pump wavelengths. With the coupled-mode equations derived from modal theory for describing the light propagation, we simulate the continuous terahertz DFG process, and a high power-normalized conversion efficiency of 0.7632 × 10^-4 W^-1 for 3 THz generation is obtained.

© 2012 IEEE

Tunable terahertz wave difference frequency generation in a graphene/AlGaAs surface plasmon waveguide

Tao Chen, Liangling Wang, Lijuan Chen, Jing Wang, Haikun Zhang, and Wei Xia
Photon. Res. 6(3) 186-192 (2018)

Design of a LiNbO₃ ribbon waveguide for efficient difference-frequency generation of terahertz wave in the collinear configuration

Y. Takushima, S. Y. Shin, and Y. C. Chung
Opt. Express 15(22) 14783-14792 (2007)

Pulsed- and continuous-wave difference-frequency generation in AlGaAs Bragg reflection waveguides

J. B. Han, D. P. Kang, P. Abolghasem, B. J. Bijlani, and A. S. Helmy
J. Opt. Soc. Am. B 27(12) 2488-2494 (2010)

Design of a GaP/Si composite waveguide for CW terahertz wave generation via difference frequency mixing

Kyosuke Saito, Tadao Tanabe, and Yutaka Oyama
Appl. Opt. 53(17) 3587-3592 (2014)

Difference-frequency generation in AlGaAs Bragg reflection waveguides

Jun-Bo Han, Payam Abolghasem, Dongpeng Kang, Bhavin J. Bijlani, and Amr S. Helmy
Opt. Lett. 35(14) 2334-2336 (2010)