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Optical filter and monochromator based on periodic structures with different refractive index materials

MOHD. ANIS1,* , VIPIN KUMAR2, KH. S. SINGH2, GULBEER SINGH1, ANJALI CHAUDHARY3

Affiliation

  1. Department of Physics, S. G. (P.G.) College, Saroorpur Khurd, Meerut-200005, India
  2. Department of Physics, Digamber Jain (P.G.) College, Baraut-250611, India
  3. Department of Physics, Samrat Prithvi Raj Chauhan Degree College, Baghpat (U.P.), India

Abstract

An optical filter based on periodic structure i.e. photonic band gap (PBG) materials has been suggested. The theory and working principle of this filter is analogous to Kronig and Penny model in solid state physics. We study the ZnS/Ge (refractive indices for ZnS and Ge are 2.2 and 4.2 respectively) periodic multilayer structure taking the controlling parameters as Yablonovite structure. Emphasis of the present investigation is given to the study of the structure in the ultraviolet region of electromagnetic radiation. In this study we present the dependence of various properties of the structure considered on angle of incidence. As we increase the angle of incidence, the total number of allowed bands decreases but the band width of all bands increases. By cascading such filters we can design the optical monochromator..

Keywords

Optical filter, Photonic band gap, Yablonovite.

Submitted at: May 5, 2011
Accepted at: July 25, 2011

Citation

MOHD. ANIS, VIPIN KUMAR, KH. S. SINGH, GULBEER SINGH, ANJALI CHAUDHARY, Optical filter and monochromator based on periodic structures with different refractive index materials, Journal of Optoelectronics and Advanced Materials Vol. 13, Iss. 7, pp. 825-829 (2011)