Title

Reverse saturable absorption in polymethine dyes

Keywords

Optical limiting; Polymethine dyes; Polyurethane acrylate; Reverse saturable absorbers; Sensor protection

Abstract

Thenonlinear absorption of a series of polymethine dyes (PD's) have been investigated, and some of them are identified as potential candidates for optical limiting applications. We have demonstrated that very low optical limiting thresholds can be obtained by using polymethine dyes with a large ratio of the absorption cross section of the excited to the ground-state: a ratio as large as 200 has been measured in one of the PD's. This value is significantly higher than any previously reported value, while, at the same time, maintaining a large ground-state cross section. It has been shown that nonlinear absorption of PD's in polyurethane acrylate (PUA) polymer is as large as in ethanol solution. In addition, photostability of the PD's and initial measurements ofoptical limiting in these samples are reported. ©2005 Copyright SPIE - The International Society for Optical Engineering.

Publication Date

12-1-1997

Publication Title

Proceedings of SPIE - The International Society for Optical Engineering

Volume

3146

Number of Pages

12-21

Document Type

Article; Proceedings Paper

Personal Identifier

scopus

DOI Link

https://doi.org/10.1117/12.284164

Socpus ID

0040155029 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/0040155029

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