T-ray topography by time-domain polarimetry

Naoya Yasumatsu, Shinichi Watanabe

Research output: Contribution to journalArticlepeer-review

26 Citations (Scopus)


We demonstrate a method for substantially improving the axial resolution of terahertz time-of-flight measurements by analyzing the time-dependent polarization direction of an elliptically polarized single-cycle terahertz electromagnetic (T-ray) pulse. We show that, at its most sensitive, the technique has an axial resolution of ̃/1000 (<1 μm) with a subsecond measurement time, and very clear T-ray topographic images are obtained. Such a very high axial resolution of the T-ray topography opens the way for novel industrial and biomedical applications such as fine metalworking and corneal inspection in a safe manner.

Original languageEnglish
Pages (from-to)2706-2708
Number of pages3
JournalOptics Letters
Issue number13
Publication statusPublished - 2012 Jul 1

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics


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