Diffraction-limited real-time terahertz imaging by optical frequency up-conversion in a DAST crystal | Zendy

Shuzhen Fan | Zendy; Feng Qi | Zendy; T. Notake | Zendy; Kouji Nawata | Zendy; Yuma Takida | Zendy; Takeshi Matsukawa | Zendy; Hiroaki Minamide | Zendy

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Diffraction-limited real-time terahertz imaging by optical frequency up-conversion in a DAST crystal

Author(s) -

Shuzhen Fan,

Feng Qi,

T. Notake,

Kouji Nawata,

Yuma Takida,

Takeshi Matsukawa,

Hiroaki Minamide

Publication year - 2015

Publication title -

optics express

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.394

H-Index - 271

ISSN - 1094-4087

DOI - 10.1364/oe.23.007611

Subject(s) - terahertz radiation , optics , diffraction , materials science , medical imaging , interference (communication) , optoelectronics , resolution (logic) , crystal (programming language) , terahertz spectroscopy and technology , image resolution , physics , telecommunications , computer science , programming language , channel (broadcasting) , artificial intelligence

Real-time terahertz (THz) wave imaging has wide applications in areas such as security, industry, biology, medicine, pharmacy, and the arts. This report describes real-time room-temperature THz imaging by nonlinear optical frequency up-conversion in an organic 4-dimethylamino-N'-methyl-4'-stilbazolium tosylate (DAST) crystal, with high resolution reaching the diffraction limit. THz-wave images were converted to the near infrared region and then captured using an InGaAs camera in a tandem imaging system. The resolution of the imaging system was analyzed. Diffraction and interference of THz wave were observed in the experiments. Videos are supplied to show the interference pattern variation that occurs with sample moving and tilting.

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