AlxGa1-xAs nested waveguide heterostructures for continuously phase-matched terahertz difference frequency generation

作者：Staus C M^*; Kuech T F; McCaughan L

来源：Optics Express, 2010, 18(3): 2332-2338.

DOI：10.1364/OE.18.002332

We previously demonstrated a nested pair of single mode (pump/THz) waveguides which produced guided far-infrared (1.3 THz) light with a record power-normalized conversion efficiency of 1.3x10(-7) W-1 by way of continuous phase matched difference frequency generation (DFG) [Opt. Express 16, 13296 (2008)]. Using the same numerical simulation tools we used to design and model this LiNbO3-based device, we show that a lattice-matched AlGaAs heterostructure, with its significantly lower absorption losses, can produce guided far-infrared light (3.5 THz) with a power-normalized conversion efficiency of 1.3 x 10(-5) W-1 - some 100 times larger than achieved with the LiNbO3 structure.

• 出版日期2010-2-1