Enhanced photostability and optical nonlinearity of nickel and cobalt organometallic complexes

K. B. Manjunatha, Ravindra Rajarao, P. Poornesh, B. J. Rudresha, G. Umesh, B. Ramachandra Bhat

Research output: Contribution to journalArticle

Abstract

Nonlinear optical and limiting properties of nickel, cobalt metal-organic complexes and ligand (L) {L = N,N′-o-phenylenebis (4-hyrdoxy-salicylideneimine)} were studied using Z-scan technique using Q-switched Nd: YAG laser with nanosecond pulses at 532 nm. The results reveal that metal complexes exhibit large negative nonlinear refractive index (n 2 ) of the order of 10 −11 esu. The metal complexes displays large nonlinearity than the ligand due to effective charge delocalization between metal ion and ligand. The magnitude of ground state absorption cross section is small compared to the effective excited-state absorption cross section implying the observed nonlinearity is due to reverse saturable absorption. Further, metal-organic complexes exhibit enhanced optical limiting behaviour at nanosecond laser pulses.

Original languageEnglish
Pages (from-to)494-497
Number of pages4
JournalOptical Materials
Volume89
DOIs
Publication statusPublished - 01-03-2019

Fingerprint

Organometallics
Cobalt
Nickel
cobalt
Coordination Complexes
nonlinearity
Ligands
nickel
Metal complexes
Laser pulses
Metals
metals
absorption cross sections
ligands
Excited states
Ground state
Metal ions
Refractive index
Q switched lasers
pulses

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Computer Science(all)
  • Atomic and Molecular Physics, and Optics
  • Electrical and Electronic Engineering

Cite this

Manjunatha, K. B. ; Rajarao, Ravindra ; Poornesh, P. ; Rudresha, B. J. ; Umesh, G. ; Ramachandra Bhat, B. / Enhanced photostability and optical nonlinearity of nickel and cobalt organometallic complexes. In: Optical Materials. 2019 ; Vol. 89. pp. 494-497.
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Enhanced photostability and optical nonlinearity of nickel and cobalt organometallic complexes. / Manjunatha, K. B.; Rajarao, Ravindra; Poornesh, P.; Rudresha, B. J.; Umesh, G.; Ramachandra Bhat, B.

In: Optical Materials, Vol. 89, 01.03.2019, p. 494-497.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Enhanced photostability and optical nonlinearity of nickel and cobalt organometallic complexes

AU - Manjunatha, K. B.

AU - Rajarao, Ravindra

AU - Poornesh, P.

AU - Rudresha, B. J.

AU - Umesh, G.

AU - Ramachandra Bhat, B.

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AB - Nonlinear optical and limiting properties of nickel, cobalt metal-organic complexes and ligand (L) {L = N,N′-o-phenylenebis (4-hyrdoxy-salicylideneimine)} were studied using Z-scan technique using Q-switched Nd: YAG laser with nanosecond pulses at 532 nm. The results reveal that metal complexes exhibit large negative nonlinear refractive index (n 2 ) of the order of 10 −11 esu. The metal complexes displays large nonlinearity than the ligand due to effective charge delocalization between metal ion and ligand. The magnitude of ground state absorption cross section is small compared to the effective excited-state absorption cross section implying the observed nonlinearity is due to reverse saturable absorption. Further, metal-organic complexes exhibit enhanced optical limiting behaviour at nanosecond laser pulses.

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