Heavy atom effect on nonlinear absorption and optical limiting characteristics of 5,10,15,20-(tetratolyl) porphyrinato phosphorus (V) dichloride

P. Prem Kiran, N. K.M. Naga Srinivas, D. Raghunath Reddy, Bhaskar G. Maiya, Aditya Dharmadhikari, Arvinder S. Sandhu, G. Ravindra Kumar, D. Narayana Rao

Research output: Contribution to journalArticlepeer-review

31 Scopus citations

Abstract

Optical limiting performance and third-order nonlinearity χ(3) are investigated in 5,10,15,20-(tetratolyl) porphyrinato phosphorus (V) dichloride ([(TTP)PVCl2]+). Heavy atom effect exerted by the two axial chlorides is found to result in low fluorescence yield (∅fl), shorter lifetimes of S1, T1 and faster intersystem crossing (ISC), leading to larger excited state absorption (ESA) from T1 → Tn. This phenomenon is found to lower the limiting threshold by 30 times and increase the second hyperpolarizability by one and three orders in ps and ns time regimes, respectively.

Original languageEnglish (US)
Pages (from-to)347-352
Number of pages6
JournalOptics Communications
Volume202
Issue number4-6
DOIs
StatePublished - Feb 15 2002
Externally publishedYes

Keywords

  • Exicited state absorption
  • Heavy atom effect
  • Optical limiting
  • Porphyrin

ASJC Scopus subject areas

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

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