Nonlinear optical studies of newly synthesized polythiophenes containing pyridine and 1,3,4-oxadiazole units

P. Poornesh, P. K. Hegde, M. G. Manjunatha, G. Umesh, A. V. Adhikari

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

We report measurements of the third-order nonlinear optical properties of a newly synthesized thiophene- based copolymer. The nonlinear transmission measurements were performed on the copolymer dissolved in tetrahydrofuran by employing the single beam Z-scan technique. Q-switched laser output at 532-nm wavelength was used for this purpose. The nonlinear absorption coefficient, β, nonlinear refractive index, n2, and the real and imaginary parts of third-order susceptibility, x(3), were, 18.93 cm/GW, 3.037 x 10 -17 m2/W (1.022 x 10-10 esu), 1.512 x 10-20 m2/V2(-1.080 x 10 -12 esu) and 0.399 x 10-20 2m/V2 (0.285 x 10 -12 esu), respectively. The excited state absorption crosssection σexc, was found to be larger than the ground state absorption crosssection σg, indicating reverse saturable absorption (RSA) in the copolymer sample. The co- polymer exhibits an optical power limiting threshold of about 120 μJ and saturated output of less than 80 μJ. Hence, the copolymer seems to be a promising material for photonic device applications.

Original languageEnglish
Pages (from-to)875-880
Number of pages6
JournalPolymer Engineering and Science
Volume49
Issue number5
DOIs
Publication statusPublished - 01-05-2009

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Pyridine
Copolymers
Polymers
Q switched lasers
Thiophenes
Photonic devices
Thiophene
Excited states
Ground state
Refractive index
Optical properties
Wavelength
pyridine
1,3,4-oxadiazole
polythiophene

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Polymers and Plastics
  • Materials Chemistry

Cite this

Poornesh, P. ; Hegde, P. K. ; Manjunatha, M. G. ; Umesh, G. ; Adhikari, A. V. / Nonlinear optical studies of newly synthesized polythiophenes containing pyridine and 1,3,4-oxadiazole units. In: Polymer Engineering and Science. 2009 ; Vol. 49, No. 5. pp. 875-880.
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Nonlinear optical studies of newly synthesized polythiophenes containing pyridine and 1,3,4-oxadiazole units. / Poornesh, P.; Hegde, P. K.; Manjunatha, M. G.; Umesh, G.; Adhikari, A. V.

In: Polymer Engineering and Science, Vol. 49, No. 5, 01.05.2009, p. 875-880.

Research output: Contribution to journalArticle

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