http://onlinelibrary.wiley.com/doi/10.1002/pssc.201200432/abstract
In this study, we propose new terahertz generation method. When we inject pump and signal wave into periodic multilayer structure obliquely (abstract figure), transmission resonant mode splits into two modes, i.e. p-polarized mode and s-polarized mode. By using two modes for difference frequency generation (DFG), THz wave can generate. As a result of theoretical calculation, composite photonic structure shows high performance, i.e. the conversion efficiency up to 10-3 % and wide tuneable frequency ranging from a few hundred of GHz to 3 THz. Further, the thickness of this element is order of a few micrometers that includes resonator mirror parts and total optical system can become compact size. This scheme has potential to achieve tuneable continuous wave (cw) THz source at room temperature. (© 2012 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim)
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