Enhanced saturable absorption in the laser-treated free-standing carbon nanotube films

V. V. Vanyukov*, K. G. Mikheev, A. G. Nasibulin, Y. Svirko, G. M. Mikheev

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

Abstract

We demonstrate an increase of optical transmittance and saturable absorption of laser-treated free-standing single-walled carbon nanotube (SWNT) films. The combined acid and low-power non-destructive laser treatment ensures an enhancement of linear transmittance across the visible range and double-digit increase of the saturable absorption of femtosecond laser radiation at 795 nm. The saturable absorption coefficient and the ratio of saturable to non-saturable losses increase by 26% and 35%, correspondingly, while the saturation intensity decreases by 20% because of the treatment. Our analysis indicates that with the performed treatment one can significantly improve the nonlinear optical properties of free-standing SWNT-based ultrafast saturable absorbers.

Original languageEnglish
Pages (from-to)5377-5380
Number of pages4
JournalOptics Letters
Volume45
Issue number19
DOIs
Publication statusPublished - 1 Oct 2020
MoE publication typeA1 Journal article-refereed

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