Nonlinear Refraction and Two-Photon Absorption in Dense 2Bi(2)O(3)-B2O3 Glasses

Paramesh, Gadige and Varma, KBR (2012) Nonlinear Refraction and Two-Photon Absorption in Dense 2Bi(2)O(3)-B2O3 Glasses. In: 56th DAE-Solid State Physics Symposium (SSPS), DEC 19-23, 2011 , SRM Univ, Kattankulathur, INDIA, pp. 603-604.

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Abstract

High density transparent glasses (7.86 g/cc) were fabricated in the 2Bi(2)O(3)-B2O3 (BBO) system. Optical band gap of the obtained glasses was found to be 2.6eV. The refractive index measured for these glasses was 2.25 +/- 0.05 at lambda=543 nm. Nonlinear refraction and absorption studies were carried out on the BBO glasses using z-scan technique a lambda=532 nm of 10 ns pulse width. The nonlinear refractive index obtained was n(2)=12.1x10(-14) cm(2)/W and nonlinear absorption coefficient was beta=15.2 cm/GW. The n(2) and beta values of the BBO glasses were large compared to the other reported high index bismuth based oxide glass systems in the literature. These were attributed to the high density, high linear refractive index, low band gap and two photon absorption associated with these glasses. The electronic origin of large nonlinearities was discussed based on bond-orbital theory.

Item Type:	Conference Proceedings
Series.:	AIP Conference Proceedings
Publisher:	American Institute of Physics
Additional Information:	Copyright for this article belongs to American Institute of Physics, USA.
Keywords:	Bismuth borate glasses;Refractive index;nonlinear refractive index and two-photon absorption coefficient
Department/Centre:	Division of Chemical Sciences > Materials Research Centre
Date Deposited:	07 Dec 2012 10:10
Last Modified:	12 Dec 2012 05:22
URI:	http://eprints.iisc.ac.in/id/eprint/45118

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