Efficient electro-optic sampling detection of terahertz radiation via Cherenkov phase matching

Masahiko Tani, Kazuki Horita, Tetsuya Kinoshita, Christopher T. Que, Elmer Estacio, Kohji Yamamoto, Michael I. Bakunov
2011 Optics Express  
We experimentally demonstrate an efficient electro-optic sampling scheme based on Cherenkov phase matching of broadband terahertz radiation with 800-nm femtosecond probe beam in a 0.5 mm-thick LiNbO 3 crystal coupled to a Si prism. The electro-optic signal from a Cherenkov-phase-matched LiNbO 3 crystal is found to be comparable to that with a 4 mm-thick ZnTe crystal using a collinear phase matching. The Cherenkov phase matching technique can be achieved with any probe wavelength and hence has
more » ... gth and hence has an advantage over the collinear phase matching method.
doi:10.1364/oe.19.019901 pmid:21996998 fatcat:opgtjkgtdjcjdkjxpygcoahaou