Investigation of the optical properties of magnesium fluoride film deposited by electron beam evaporation technique in the wavelengths 400-1800nm

Document Type : Full length research Paper

Authors

Imam khomeini international university, Qazvin

Abstract

In this paper, the effects of temperature on the refractive index layer of magnesium fluoride, MgF2, is investigated. The  layers, using the electron gun, in temperatures of different 25,100,200,300 °C and  were deposited on the glass substrate (BK7). In all samples, the deposition rate was Å/C. Transmission spectra of samples, using a spectrophotometer at wavelengths 400-800nm  were determined. The sample produced at room temperature was annealed for 2 hours at 300°C. Then, indexes of refraction of samples were calculated using three methods. The refractive indexes according to the methods were in a good agreement with one another. The results showed that by increasing the temperature from laboratory temperature to 300 °C, the refractive index of magnesium fluoride increased as a linear function from n=1.32 to n=1.39. Moreover, the index of refraction of the annealed sample increased conspicuously while the annealed sample showed some absorption.

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References

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Journal of Research on Many-body Systems
Volume 7, Issue 13
June 2017
Pages 105-112

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History

  • Receive Date: 30 September 2015
  • Revise Date: 06 August 2016
  • Accept Date: 05 October 2016

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