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Please use this identifier to cite or link to this item: http://hdl.handle.net/2289/5269

Title: Nonlinear optical studies of the sol-gel derived lithium tetraborate thin film
Authors: Dhanuskodi, S.
Mohandoss, R.
Philip, Reji
Keywords: decomposition
annealing
nonlinear optics
aperture antennas
Issue Date: Oct-2011
Publisher: American Institute of Physics
Citation: AIP Conference Proceedings, 2011, Vol.1391, p686-688, Proceedings of optics: phenomena, materials, devices, and characterization: Optics 2011: Inter national Conference on Light Solid State Physics ,23–25 May 2011, Calicut, Kerala, (India)
Abstract: Lithium tetraborate, Li2B4O7 films on glass substrate were prepared by chemical solution decomposition (CSD) method. The spin coated film (2000 rpm, 20 sec) was preheated (200 °C, 20 min) and then annealed at different temperatures (450°-600 °C) to form polycrystalline Li2B4O7 film. By X-ray diffraction (XRD), the prominent planes are found to be (100), (113), (302) and (403). The result shows that the main component of the film is Li2B4O7 crystalline phase. A slow XRD scan was used to calculate the crystallite size (D) and the average crystallite size was found to be 178 nm. The lower cut off wavelength at 325 nm with 75% transparency was measured by the UV-Vis spectra and the spectral dependence of the optical constants (extinction coefficient (K), reflectance(R)) was estimated. The optical energy band gap was found to be 3.62 eV. The nonlinear optical properties were studied by Z-scan experiment using a Q-switched, Nd: YAG laser (532 nm, 7 ns). The nonlinear absorption coefficient (NLA) β was found to be -5.74×10-5 cm/W. Reverse saturable absorption (RSA) is due to the multi photon absorption process. The high value of β makes the film suitable for optical limiting applications.
Description: Restricted Access, Optics 2011: Inter national Conference on Light Solid State Physics, P 686, 23–25 May 2011, Calicut, Kerala, (India)
URI: http://hdl.handle.net/2289/5269
ISSN: 0094-243X
1551-7616 (online)
Alternative Location: http://adsabs.harvard.edu/abs/2011AIPC.1391..686D
http://dx.doi.org/10.1063/1.3643649
Copyright: 2011 American Institute of Physics
Appears in Collections:Research Papers (LAMP)

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