Issue 28, 2025

Thermotransmittance spectroscopy of layered crystals using lab on fiber

Abstract

Transition metal dichalcogenides are extensively studied for their unique optical properties, with emission and reflectance techniques commonly used to probe optical transitions. In this context, a thermotransmittance technique is introduced as a novel method to investigate the transmission and absorption properties of thin TMDC crystals transferred onto the core of multimode optical fibers. Using transmission and photomodulated transmission techniques, significant changes in the amount of transmitted light, reaching almost 60%, were detected. These changes, evoked by laser heating and subsequent heat accumulation, correspond to excitonic transitions. The obtained results indicate significant red shifts and changes in absorption coefficients around optical transitions, highlighting the materials’ sensitivity to temperature variations. As the laser illumination of the sample causes either an energy shift of optical transition or a change in the amount of transmitted light, these findings demonstrate that the TMDC-coated optical fibers could be utilized as light modulators or temperature sensors.

Graphical abstract: Thermotransmittance spectroscopy of layered crystals using lab on fiber

Supplementary files

Article information

Article type
Paper
Submitted
21 Jan 2025
Accepted
29 May 2025
First published
02 Jul 2025
This article is Open Access
Creative Commons BY license

Nanoscale, 2025,17, 16818-16828

Thermotransmittance spectroscopy of layered crystals using lab on fiber

K. Ciesiołkiewicz, J. Kopaczek and R. Kudrawiec, Nanoscale, 2025, 17, 16818 DOI: 10.1039/D5NR00301F

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