Deeply subwavelength terahertz solid immersion microscopy using rutile optics.

V. A. Zhelnov,N. V. Chernomyrdin,G. M. Katyba,A. A. Gavdush,V. V. Bukin,S. V. Garnov,I. E. Spektor,V. N. Kurlov,M. Skorobogatiy, I. Zaytsev

2023 IEEE PHOTONICS CONFERENCE, IPC（2023）

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Abstract

A rutile crystal is used to machine a solid immersion lens, boasting a very high refractive index of similar to 10 in the terahertz range. We further show experimentally that a solid immersion microscope using such a lens achieves a record-breaking spatial resolution of 0.06-0.11 wavelength.

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Key words

terahertz imaging,superresolution,solid immersion microscopy,rutile optics

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