Investigation of third-order nonlinear optical properties of conjugated benzodioxal derivatives

Seetharam Shettigar, P. Poornesh, G. Umesh, B. K. Sarojini, B. Narayana, K. Prakash Kamath

Research output: Contribution to journalArticlepeer-review

22 Citations (Scopus)

Abstract

An investigation of third-order nonlinear optical characterization of newly synthesized conjugated benzodioxal derivatives has been done by using nanosecond Z-scan technique at 532 nm. The molecules demonstrate self-defocusing effect with intensity dependent refractive index (n2) of the order of 10-14 cm2/W. The measured molecular TPA cross-section is ranging from 2.47 ×10-47 cm4 s/photon to 6.00 cm4 s/photon. Their input-output curves indicate that there is a clear optical power limiting behavior with the limiting threshold in the range 125-181 μJ. The main factor to exhibit the observed nonlinearity in these molecules is the presence of charge donor and acceptor groups. The increased conjugation length increases the nonlinear refraction and increased electron density enhances the nonlinear absorption. The molecules exhibit good nonlinear optical properties, comparable to those of regular azoaromatic compounds. Therefore, the molecules investigated here are promising candidates for optical power limiting devices.

Original languageEnglish
Pages (from-to)1162-1166
Number of pages5
JournalOptics and Laser Technology
Volume42
Issue number7
DOIs
Publication statusPublished - 01-10-2010

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Electrical and Electronic Engineering

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