Title

Third- and fifth-order optical nonlinearities in organic materials

Abstract

We measure the nonlinear optical properties of solutions of a bisbenzethiozole-substituted thiophene compound (BBTDOT) and didecyloxy substituted polyphenyl (DDOS) using the Z-scan technique with 532 nm picosecond pulses. Both compounds exhibit two-photon absorption (2PA) and excited-state absorption (ESA) from the 2PA generated excited states. We measure the magnitude and sign of the real (refractive) and imaginary (2PA) parts of the third-order hyperpolarizability, and the excited-state absorptive and refractive cross sections. We observe third-order self-focusing in BBTDOT and self-defocusing in DDOS while both show excited-state defocusing. All these effects were previously observed and modeled in semiconductors giving insight into the nonlinearities occurring in these organic materials. © 1994.

Publication Date

10-14-1994

Publication Title

Chemical Physics Letters

Volume

228

Issue

6

Number of Pages

646-650

Document Type

Article

Identifier

scopus

Personal Identifier

scopus

DOI Link

https://doi.org/10.1016/0009-2614(94)00999-6

Socpus ID

0001555067 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/0001555067

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