High-sensitivity detection of terahertz waves using nonlinear up-conversion in an organic 4-dimethylamino-N-methyl-4-stilbazolium tosylate crystal

Hiroaki Minamide, Jun Zhang, Ruixiang Guo, Katsuhiko Miyamoto, Seigo Ohno, Hiromasa Ito

Research output: Contribution to journalArticlepeer-review

28 Citations (Scopus)

Abstract

We achieved high-sensitivity, rapid-response detection of terahertz (THz) waves using an organic nonlinear optical crystal, 4-dimethylamino-N-methyl-4- stilbazolium tosylate (DAST). Nonlinear up-conversion in the crystal resulted in a shift of THz waves to near-infrared radiation at room temperature. A minimum THz-wave peak power of about 300 μW was measured at 19.2 THz by detecting the up-converted optical signal with an InGaAs-based photodetector. A noise equivalent power of about 6 nW/ Hz1/2 was estimated in this experiment. Optimum conditions were obtained for THz-wave detection using a DAST crystal.

Original languageEnglish
Article number121106
JournalApplied Physics Letters
Volume97
Issue number12
DOIs
Publication statusPublished - 2010 Sep 20

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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