Unidirectional radiation of widely tunable THz wave using a prism coupler under noncollinear phase matching condition

Kodo Kawase, Manabu Sato, Koichiro Nakamura, Tetsuo Taniuchi, Hiromasa Ito

Research output: Contribution to journalArticlepeer-review

118 Citations (Scopus)

Abstract

A widely tunable THz wave has been parametrically generated and reported recently by us utilizing a LiNbO3 crystal with a monolithic grating coupler under a noncollinear phase matching condition. However, the output direction of the THz wave is strongly dependent on the generated frequency due to the nature of noncollinear phase matching, as well as the grating coupler. In this letter, a novel method for THz coupling is proposed using a low dispersion prism to eliminate almost completely the THz beam deflection for the entire tuning range. The unidirectional THz wave radiation was confirmed theoretically and experimentally for the range of 1-2 THz.

Original languageEnglish
Pages (from-to)753-755
Number of pages3
JournalApplied Physics Letters
Volume71
Issue number6
DOIs
Publication statusPublished - 1997 Aug 11

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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