Third-order nonlinear optical response of indigo carmine under 633 nm excitation for nonlinear optical applications

S. Pramodini, P. Poornesh

Research output: Contribution to journalArticle

22 Citations (Scopus)

Abstract

We report thermally induced third-order nonlinearity and optical limiting behaviour of Indigo Carmine dye. z-Scan technique was used to determine the sign and magnitude of absorptive and refractive nonlinearities. Continuous wave (CW) He-Ne laser operating at 633 nm was used as source of excitation. In open aperture z-scan experiments, samples exhibited reverse saturable absorption (RSA) process. For closed aperture z-scan experiments, samples revealed self-defocusing property. The presence of donor and acceptor groups in the structure increases the conjugation length and in turn increases the optical nonlinearity. Induced self-diffraction rings pattern was recorded for the samples and it is attributed to refractive index change and thermal lensing. Also, optical limiting and clamping studies were carried out for various input power. Optical clamping of about ~1 mW was observed. This endorses that the dye under investigation is a positive candidate for opto-electronic and photonic applications.

Original languageEnglish
Pages (from-to)114-119
Number of pages6
JournalOptics and Laser Technology
Volume63
DOIs
Publication statusPublished - 01-01-2014

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Indigo Carmine
Coloring Agents
Dyes
nonlinearity
apertures
dyes
Photonics
excitation
Refractive index
thermal lensing
Diffraction
Experiments
defocusing
conjugation
continuous radiation
Lasers
photonics
refractivity
rings
electronics

All Science Journal Classification (ASJC) codes

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

Cite this

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abstract = "We report thermally induced third-order nonlinearity and optical limiting behaviour of Indigo Carmine dye. z-Scan technique was used to determine the sign and magnitude of absorptive and refractive nonlinearities. Continuous wave (CW) He-Ne laser operating at 633 nm was used as source of excitation. In open aperture z-scan experiments, samples exhibited reverse saturable absorption (RSA) process. For closed aperture z-scan experiments, samples revealed self-defocusing property. The presence of donor and acceptor groups in the structure increases the conjugation length and in turn increases the optical nonlinearity. Induced self-diffraction rings pattern was recorded for the samples and it is attributed to refractive index change and thermal lensing. Also, optical limiting and clamping studies were carried out for various input power. Optical clamping of about ~1 mW was observed. This endorses that the dye under investigation is a positive candidate for opto-electronic and photonic applications.",
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Third-order nonlinear optical response of indigo carmine under 633 nm excitation for nonlinear optical applications. / Pramodini, S.; Poornesh, P.

In: Optics and Laser Technology, Vol. 63, 01.01.2014, p. 114-119.

Research output: Contribution to journalArticle

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