Preprint Concept Paper Version 1 Preserved in Portico This version is not peer-reviewed

Terahertz Microscopy with Oblique Subwavelength Illumination in near Field

Version 1 : Received: 31 August 2021 / Approved: 1 September 2021 / Online: 1 September 2021 (14:32:47 CEST)

How to cite: Minin, I.V.; Minin, O.V. Terahertz Microscopy with Oblique Subwavelength Illumination in near Field. Preprints 2021, 2021090024 (doi: 10.20944/preprints202109.0024.v1). Minin, I.V.; Minin, O.V. Terahertz Microscopy with Oblique Subwavelength Illumination in near Field. Preprints 2021, 2021090024 (doi: 10.20944/preprints202109.0024.v1).

Abstract

Microscopes based on dielectric mesoscale particles, using the effect of a photonic jet or terajet in the terahertz range, are a promising tool for overcoming the diffraction limit. However, the image they generate has limited contrast, which limits the application of this method. In this letter, we demonstrate that it is possible to increase the contrast of an image based on dielectric mesoscale particles that provide the formation of photonic hooks. In this case, the illumination of the object is carried out by an oblique incidence of subwavelength terajet, which significantly (more than 2 times) increases the contrast of the image.

Keywords

photonic hook; terajet; oblique illumination; image contrast

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