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Suthar B.,Government College of Engineering and Textile Technology , Berhampore | Kumar V.,P.A. College | Kumar A.,Amity University | Singh K.S.,P.A. College | Bhargava A.,Government Dungar College
Progress in Electromagnetics Research Letters | Year: 2012

The effect of temperature on the photonic band gap has been investigated. One dimensional photonic crystal in the form of Si/air multilayer system has been studied in this communication. The refractive index of silicon layers is taken as a function of temperature and wavelength both. Therefore, this study may be considered to be physically more realistic. It may be useful for computing the optical properties for wider range of wavelength as well as temperature. We can use the proposed structure as temperature sensing device, narrow band optical filter and in many optical systems. Source


Kumar V.,P.A. College | Suthar B.,Government College of Engineering and Textile Technology , Berhampore | Kumar A.,Amity University | Singh K.S.,P.A. College | Bhargava A.,Government Dungar College
Optik | Year: 2013

Transmission characteristics of one-dimensional photonic crystal structure with a defect have been studied. We consider a Si/air multilayer system. We also consider the refractive index of Si layer to be dependent on temperature and wavelength simultaneously. Central wavelength of the defect mode depends on the width of the defect layer, so we can change the central wavelength of defect mode by changing the width of defect layer. This property can be exploited in the designing of wavelength division demultiplexer for optical communication. © 2012 Elsevier GmbH. Source


Kumar V.,P.A. College | Suthar B.,Government Engineering College | Kumar A.,Amity University | Singh K.S.,P.A. College | Bhargava A.,Government Dungar College
Physica B: Condensed Matter | Year: 2013

The effect of temperature and angle of incidence on photonic band gaps (PBGs) in a dispersive Si-based one dimensional photonic crystal consisting of alternate layers of silicon and air has been investigated. More physically realistic situation is considered by taking the refractive index of silicon layers as a function of temperature and wavelength. The effect of temperature and angle of incidence on reflection spectra of proposed structure for TE polarization has also been studied. The PBG can be tuned by varying the temperature of the geometry or by changing the angle of incidence. The propagation characteristics of the proposed structure are analyzed using transfer matrix method. Source


Suthar B.,Government Engineering College | Bhargava A.,Government Dungar College
Silicon | Year: 2015

In the present communication, the optical properties of a one-dimensional plasma photonic crystal (PPC) containing alternate dielectric and plasma layers has been studied. The photonic band structure, reflection spectra and group velocity of such photonic crystals have been presented. It is found that the photonic bandgap can be increased with the thickness of plasma layers and group velocity reaches negative values at a certain frequency. © 2015, Springer Science+Business Media Dordrecht. Source


Kumar A.,Amity University | Kumar V.,P.A. College | Suthar B.,Government Dungar College | Suthar B.,Government College of Engineering and Textile Technology , Berhampore | And 3 more authors.
IEEE Photonics Technology Letters | Year: 2013

Theoretical studies on the group velocity of light wave in 1-D polystyrene/SiO2 nonlinear photonic crystal is investigated. The speed of light wave through these multilayered structures is calculated in the absence as well as in the presence of a high intensity controlling wave by using the transfer matrix method. This letter shows that we can trap a light wave inside the nonlinear 1-D photonic crystal by switching off the controlling wave. © 2012 IEEE. Source

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