Novel THz-wave generation technique and applications
- Resource Type
- Conference
- Authors
- Kawase, Kodo; Shibuya, Takayuki; Suizu, Koji; Hayashi, Shin'ichiro
- Source
- 2010 Conference Proceedings ICECom, 20th International Conference on Applied Electromagnetics and Communications ICECom, 2010 Conference Proceedings. :1-4 Sep, 2010
- Subject
- Communication, Networking and Broadcast Technologies
Components, Circuits, Devices and Systems
Computing and Processing
Engineered Materials, Dielectrics and Plasmas
Fields, Waves and Electromagnetics
Optical pumping
Optical refraction
Optical frequency conversion
Stimulated emission
Crystals
- Language
Terahertz (THz) wave generation based on nonlinear frequency conversion is a promising method for realizing a tunable monochromatic high-power THz-wave source. Unfortunately, many nonlinear crystals have strong absorption in the THz frequency region. This limits efficient and widely tunable THz-wave generation. The Cherenkov phase-matching method is one of the most promising techniques for overcoming these problems. Here, we propose a prism-coupled Cherenkov phase-matching (PCC-PM) method, in which a prism with a suitable refractive index at THz frequencies is coupled to a nonlinear crystal. This has the following advantages. Many crystals can be used as THz-wave emitters; the phase-matching condition inside the crystal does not have to be observed; the absorption of the crystal does not prevent efficient generation of radiation; and pump sources with arbitrary wavelengths can be employed.