Sub-wavelength THz imaging through optical rectification

• Sub-wavelength THz imaging has previously been demonstrated by the optical rectification method, i.e. generating THz waves in the sample [1]. We have rendered the initial experimental setup more practical by using a simple fs laser oscillator and an efficient photo-conducting detector. We thus recorded images, at different THz frequencies with a 41-μm lateral resolution, of a sample made of ZnTe grains, and generated THz peak magnitudes with a 33 μm and 12 μm lateral resolution of a periodically poled KTP crystal.

Ämnesord

NATURVETENSKAP  -- Fysik (hsv//swe)

NATURAL SCIENCES  -- Physical Sciences (hsv//eng)

Nyckelord

II-VI semiconductors

Tellurium compounds

Zinc compounds

Lateral resolution

Optical rectifications

Periodically poled KTP

Photo-conducting detectors

Sub-wavelength

THz frequencies

THz imaging

THz waves

Terahertz waves

Publikations- och innehållstyp

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