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

• Main Authors: Tani, Masahiko, Horita, Kazuki, Kinoshita, Tetsuya, Que, Christopher T., Estacio, Elmer, Yamamoto, Kohji, Bakunov, Michael I.
• Format: text
• Published: Animo Repository 2011
• Subjects: Terahertz technology; Electrooptics; Cherenkov radiation; Physics
• Online Access: https://animorepository.dlsu.edu.ph/faculty_research/11906
• Institution: De La Salle University

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 LiNbO3 crystal coupled to a Si prism. The electro-optic signal from a Cherenkov-phase-matched LiNbO3 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 an advantage over the collinear phase matching method.