Highly efficient optical-to-terahertz conversion in a sandwich structure with LiNbO_3 core
2009; Optica Publishing Group; Volume: 17; Issue: 3 Linguagem: Inglês
10.1364/oe.17.001871
ISSN1094-4087
AutoresS. B. Bodrov, A. N. Stepanov, М. И. Бакунов, B. V. Shishkin, Igor Ilyakov, Р. А. Ахмеджанов,
Tópico(s)Photonic and Optical Devices
ResumoWe demonstrate experimentally the efficiency of a recently proposed scheme of terahertz generation based on Cherenkov emission from ultrashort laser pulses in a sandwich structure. The structure has a thin nonlinear core covered with a prism of low terahertz absorption. Using an 8 mm long Si-LiNbO(3)-BK7 structure with a 50 microm thick LiNbO(3) core, we converted 40 microJ, 50 fs Ti:sapphire laser pulses into terahertz pulses of approximately 3 THz bandwidth with a record efficiency of over 0.1%.
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