Temperature-Controlled Switchable Photonic Nanojet Generated by Truncated Cylindrical Structure

Ning Su; Weiming Zhang; Xintao Zeng; Pinghui Wu; Lina Cui; Xiaohui Chen

doi:10.3390/ma16227209

Materials (Nov 2023)

Temperature-Controlled Switchable Photonic Nanojet Generated by Truncated Cylindrical Structure

Ning Su,
Weiming Zhang,
Xintao Zeng,
Pinghui Wu,
Lina Cui,
Xiaohui Chen

Affiliations

Ning Su: Key Laboratory of Information Functional Material for Fujian Higher Education, Quanzhou Normal University, Quanzhou 362000, China
Weiming Zhang: Key Laboratory of Information Functional Material for Fujian Higher Education, Quanzhou Normal University, Quanzhou 362000, China
Xintao Zeng: Key Laboratory of Information Functional Material for Fujian Higher Education, Quanzhou Normal University, Quanzhou 362000, China
Pinghui Wu: Key Laboratory of Information Functional Material for Fujian Higher Education, Quanzhou Normal University, Quanzhou 362000, China
Lina Cui: College of Textiles and Apparel, Quanzhou Normal University, Quanzhou 362000, China
Xiaohui Chen: Research Center for Photonics Technology, Quanzhou Normal University, Quanzhou 362000, China

DOI: https://doi.org/10.3390/ma16227209
Journal volume & issue: Vol. 16, no. 22
p. 7209

Abstract

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We propose a novel micro-nano structure that can realize a photonic nanojet (PNJ) switch by adjusting the temperature, which is composed of a truncated cylinder coated with a thin vanadium dioxide (VO2) film. The influence of temperature on the maximum strength, full width at half maximum (FWHM), working distance, and focal length of the PNJ were studied by finite-difference time-domain (FDTD) method. The results demonstrate that the structure can adjust the open and close state of the PNJ by changing the temperature. A PNJ with varying characteristics can be obtained at both high and low temperatures, and the maximum intensity ratio of the PNJ can reach up to 7.25. This discovery provides a new way of optical manipulation, sensing and detection, microscopy imaging, optoelectronic devices, and other fields.

Published in Materials

ISSN: 1996-1944 (Online)
Publisher: MDPI AG
Country of publisher: Switzerland
LCC subjects: Technology: Electrical engineering. Electronics. Nuclear engineering; Technology: Engineering (General). Civil engineering (General); Science: Natural history (General): Microscopy; Science: Physics: Descriptive and experimental mechanics
Website: http://www.mdpi.com/journal/materials/

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