Dj College Baraut

Uttar Pradesh, India

Dj College Baraut

Uttar Pradesh, India
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Sharma S.,Gurukul Kangri Vishwavidyalaya Haridwar | Kumar R.,Gurukul Kangri Vishwavidyalaya Haridwar | Singh Kh.S.,Dj College Baraut | Jain D.,P.A. College | Kumar A.,Amity University
AIP Conference Proceedings | Year: 2016

A simple design of broadband one dimensional dielectric/semiconductor multilayer structure having refractive index profile of exponentially graded material has been proposed. The theoretical analysis shows that the proposed structure works as a perfect mirror within a certain wavelength range (1550nm). In order to calculate the reflection properties a transfer matrix method (TMM) has been used. This property shows that binary graded photonic crystal structures have widened omnidirectional reflector (ODR) bandgap. Hence a exponentially graded photonic crystal structure can be used as a broadband optical reflector and the range of reflection can be tuned to any wavelength region by varying the refractive index profile of exponentially graded photonic crystal structure. © 2016 Author(s).


Sharma S.,Gurukul Kangri Vishwavidyalaya Haridwar | Kumar R.,Gurukul Kangri Vishwavidyalaya Haridwar | Singh K.S.,Dj College Baraut | Kumar V.,Dj College Baraut | Kumar A.,Amity University
Optik | Year: 2014

Transmission characteristics of nonlinear one dimensional photonic crystal with a defect have been studied. GaAs/Si multilayer structure with a single defect has been simulated using transfer matrix method. In this study refractive indices of both layers have been taken to be dependent on intensity and wavelength simultaneously. It is found that central wavelength of defect mode change with intensity of wave. Average change in central wavelength of defect mode is 0.02 nm/(1 GW/cm2). This property can be exploited in the design of a single channel tunable wavelength division demultiplexer for optical communication. © 2014 Elsevier GmbH.


Sharma S.,Gurukul Kangri Vishwavidyalaya Haridwar | Kumar R.,Gurukul Kangri Vishwavidyalaya Haridwar | Singh Kh.S.,Dj College Baraut | Kumar V.,Dj College Baraut | Kumar A.,Amity University
Journal of Optoelectronics and Advanced Materials | Year: 2014

The intensity dependent transmission characteristics of 1-D photonic crystal (PC) structure with a defect have been studied. We consider a SiO2/GaAs multilayer structure the refractive index of GaAs layer to be dependent on intensity. The refractive indices of GaAs layer is the functions of intensity of incident light. This property can be used to tune the defect modes at desired wavelength. It is found that the average change in central wavelength of defect mode is 0.08 nm/(GW/cm2). This property can be exploited in the design of a single channel wavelength division demultiplexer for application in optical communication.


Kumar R.,Dj College Baraut | Kumar R.,Jv College Baraut | Sanju,Jv College Baraut
AIP Conference Proceedings | Year: 2013

Partial and total double differential cross sections corresponding to various cations produced during the direct and dissociative electron ionization of carbonyl sulfide molecule have been calculated at fixed impinging electron energies 100 and 200eV by using modified Jain-Khare semi empirical approach. The calculation for double differential cross sections is made as a function of energy loss suffered by primary electron and angle of incident. To the best of our knowledge no other data is available for the comparison. © 2013 AIP Publishing LLC.


Sharma S.,G.K. Vishwavidyalaya Haridwar | Kumar R.,G.K. Vishwavidyalaya Haridwar | Singh K.S.,Dj College Baraut | Kumar V.,Dj College Baraut | Jain D.,P.A. College
AIP Conference Proceedings | Year: 2013

Omni-directional photonic bandgaps (PBG) has been presented in the one-dimensional ternary photonic crystals formed by sandwiching the superconductor layer (GaAs) between two dielectric materials (MgO) & (SiO2) in the unit cell. The existence of total Omni-directional reflection band gap in 1D-PC is predicted theoretically. Reflectivity of one dimensional periodic structure for TE and TM-modes at a particular angle of incidence has been calculated by using Transfer Matrix Method (TMM). It is found that the mirror designed with these materials has a ODR range which covers the window of 1550nm used in optical communications. © 2013 AIP Publishing LLC.

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