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 language | English |
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Pages (from-to) | 5377-5380 |
Number of pages | 4 |
Journal | Optics Letters |
Volume | 45 |
Issue number | 19 |
DOIs | |
Publication status | Published - 1 Oct 2020 |
MoE publication type | A1 Journal article-refereed |