Issue 29, 2024

Thermo-optics of gilded hollow-core fibers

Abstract

Hollow core fibers, supporting waveguiding in a void, open a room of opportunities for numerous applications owing to an extended light–matter interaction distance and relatively high optical confinement. Decorating an inner capillary with functional materials allows tailoring the fiber's optical properties further and turns the structure into a functional device. Here, we functionalize an anti-resonant hollow-core fiber with 18 nm-size gold nanoparticles, approaching a uniform 45% surface coverage along 10 s of centimeters along its inner capillary. Owing to a moderately low overlap between the fundamental mode and the gold layer, the fiber maintains its high transmission properties; nevertheless, the entire structure experiences considerable heating, which is observed and quantified with the aid of a thermal camera. The hollow core and the surrounding capillary are subsequently filled with ethanol and thermo-optical heating is demonstrated. We also show that at moderate laser intensities, the liquid inside the fiber begins to boil and, as a result, the optical guiding is destroyed. The gilded hollow core fiber and its high thermal-optical responsivity suggest considering the structure as an efficient optically driven catalytic reactor in applications where either small reaction volumes or remote control over a process are demanded.

Graphical abstract: Thermo-optics of gilded hollow-core fibers

Supplementary files

Article information

Article type
Paper
Submitted
20 Oct 2023
Accepted
06 May 2024
First published
13 Jun 2024
This article is Open Access
Creative Commons BY-NC license

Nanoscale, 2024,16, 13945-13952

Thermo-optics of gilded hollow-core fibers

D. S. Kolchanov, A. Machnev, A. Blank, H. Barhom, L. Zhu, Q. Lin, A. Inberg, K. R. Rusimova, M. A. Mikhailova, A. Gumennik, T. Salgals, V. Bobrovs, V. K. Valev, P. J. Mosley and P. Ginzburg, Nanoscale, 2024, 16, 13945 DOI: 10.1039/D3NR05310E

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