Investigations on nonlinear optical properties of electron beam treated Gd

ZnO thin films for photonic device applications

K. Spoorthi, S. Pramodini, I. V. Kityk, M. Abd-Lefdil, M. Sekkati, A. El Fakir, Ashok Rao, Ganesh Sanjeev, P. Poornesh

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

In this article, we report the third-order nonlinear optical properties of electron beam irradiated gadolinium-doped zinc oxide (GZO) thin films prepared using the spray pyrolysis deposition technique. GZO thin films were treated with an electron beam from a variable energy microtron accelerator at dose rates ranging from 1-5 kGy. Nonlinear optical measurements were conducted by employing the single beam Z-scan technique. A continuous wave He-Ne laser operating at 633 nm was used as the source of excitation. Closed aperture Z-scan results reveal that the films exhibit self-defocusing nonlinearity. Open aperture Z-scan results exhibit a switching over phenomena of reverse saturable absorption to saturable absorption for thin film irradiated at 3 kGy, indicating the influence of electron beams on optical nonlinearity. The significant change in third-order nonlinear optical susceptibility χ(3) ranging from 2.14 × 10-3 to 3.12 × 10-3 esu is attributed to the effect of electron beam irradiation. The study shows that the nonlinear coefficients of GZO films can be tuned by electron beams for use in nonlinear optical device applications.

Original languageEnglish
Article number065403
JournalLaser Physics
Volume27
Issue number6
DOIs
Publication statusPublished - 01-06-2017

Fingerprint

Photonic devices
Electron beams
Optical properties
photonics
electron beams
Gadolinium
optical properties
Thin films
gadolinium
Zinc oxide
zinc oxides
Oxide films
thin films
Microtrons
apertures
nonlinearity
Spray pyrolysis
defocusing
Optical devices
optical measurement

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics
  • Instrumentation
  • Condensed Matter Physics
  • Industrial and Manufacturing Engineering

Cite this

Spoorthi, K. ; Pramodini, S. ; Kityk, I. V. ; Abd-Lefdil, M. ; Sekkati, M. ; El Fakir, A. ; Rao, Ashok ; Sanjeev, Ganesh ; Poornesh, P. / Investigations on nonlinear optical properties of electron beam treated Gd : ZnO thin films for photonic device applications. In: Laser Physics. 2017 ; Vol. 27, No. 6.
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Investigations on nonlinear optical properties of electron beam treated Gd : ZnO thin films for photonic device applications. / Spoorthi, K.; Pramodini, S.; Kityk, I. V.; Abd-Lefdil, M.; Sekkati, M.; El Fakir, A.; Rao, Ashok; Sanjeev, Ganesh; Poornesh, P.

In: Laser Physics, Vol. 27, No. 6, 065403, 01.06.2017.

Research output: Contribution to journalArticle

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T2 - ZnO thin films for photonic device applications

AU - Spoorthi, K.

AU - Pramodini, S.

AU - Kityk, I. V.

AU - Abd-Lefdil, M.

AU - Sekkati, M.

AU - El Fakir, A.

AU - Rao, Ashok

AU - Sanjeev, Ganesh

AU - Poornesh, P.

PY - 2017/6/1

Y1 - 2017/6/1

N2 - In this article, we report the third-order nonlinear optical properties of electron beam irradiated gadolinium-doped zinc oxide (GZO) thin films prepared using the spray pyrolysis deposition technique. GZO thin films were treated with an electron beam from a variable energy microtron accelerator at dose rates ranging from 1-5 kGy. Nonlinear optical measurements were conducted by employing the single beam Z-scan technique. A continuous wave He-Ne laser operating at 633 nm was used as the source of excitation. Closed aperture Z-scan results reveal that the films exhibit self-defocusing nonlinearity. Open aperture Z-scan results exhibit a switching over phenomena of reverse saturable absorption to saturable absorption for thin film irradiated at 3 kGy, indicating the influence of electron beams on optical nonlinearity. The significant change in third-order nonlinear optical susceptibility χ(3) ranging from 2.14 × 10-3 to 3.12 × 10-3 esu is attributed to the effect of electron beam irradiation. The study shows that the nonlinear coefficients of GZO films can be tuned by electron beams for use in nonlinear optical device applications.

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