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Wilson K.S.J.,Arul Anandar College Autonomous
Optics Communications | Year: 2016

We theoretically investigate the effect of photonic band gaps in one dimensional photonic crystals based on nanocomposite of silver nanoparticles. The dielectric permittivity is computed based on the pressure dependence of plasma frequency and damping constant of silver nanoparticle. It leads to the tuning of photonic band gap. We have also investigated the change in photonic band gap due to the influence of filling factor and the size of the nanoparticles. Our results provide a guideline for designing potential photonic devices. © 2016 Elsevier B.V. All rights reserved. Source


Jeice A.R.,Annai Velankanni College | Jayam S.G.,Holy Cross College | Wilson K.S.J.,Arul Anandar College Autonomous
Indian Journal of Physics | Year: 2016

The binding energy and diamagnetic susceptibility of a hydrogenic donor in nanostructures like quantum well, quantum wire and quantum dot have been calculated for the finite and infinite barrier square well potential and are computed using variational technique. The binding energy of cubic nanostructures formed by GaAs/Ga1−xAlxAs has also been obtained using conduction band non-parabolicity and polaronic correction. Our results demonstrate that the effect of polaronic mass and band non-parabolicity which exhibits effective binding energy and diamagnetic susceptibility for the nanostructures having narrow width sizes and it is not significant to the low dimensional nanostructures. © 2016, Indian Association for the Cultivation of Science. Source


Joseph Wilson K.S.,Arul Anandar College Autonomous | Revathy V.,Arul Anandar College Autonomous | Maria Lenin M.,AnnaiVelankanni College
International Journal of ChemTech Research | Year: 2014

The several optical properties of crystals are modified due to nonlinearity associated with high intensity of the incident radiation. In the present work, the linear and nonlinear optical characterization of Al-ZnONanocomposite materials are discussed in detail. We explore the possibilities of nonlinear effects in the optical parameters. New modes on the polaritonic gap where the propagation of electromagnetic wave is forbidden, are obtained due to nonlinearity. The presence of gap mode shows the propagation of electromagnetic radiation in the polaritonic gap which may be exploited in optical communications. © 2014-2015, Sphinx Knowledge House. All rights reserved. Source


Wilson K.S.J.,Arul Anandar College Autonomous | Revathy V.,Arul Anandar College Autonomous | Lenin M.M.,Annai Velankanni College | Jothy V.B.,Womens Christian College
Materials Today: Proceedings | Year: 2015

The transmission properties of one dimensional photonic crystals with two defects having structures (HL)n(D1LD2L)m(HL)n, where m is the stack number of the Photonic Quantum Well (PQW) have been theoretically investigated by the transfer matrix method. The thickness and temperature dependence of the defect modes have been studied by considering Si and air as the high and low refractive index materials with GaAs and InSb as the two defects. For a defect lattice with m=1 (two defects) the two peaks due to defects are shifted towards the higher wavelength region, when the thickness of the defect layers is changed. Also, the transmittance peaks are shifted by 0.44. nm/K and 0.50. nm/K due to temperature variation. The above shifts for other cases (m ≠ 1 and n ≠ 1), have also been obtained. Part of these results is in qualitative agreement with the results available in the literature for other photonic crystals. © 2015 Elsevier Ltd. Source


Joseph Wilson K.S.,Arul Anandar College Autonomous | Revathy V.,Arul Anandar College Autonomous
Progress In Electromagnetics Research M | Year: 2015

We theoretically investigate the photonic band gaps in one-dimensional photonic crystals based on nano composite of silver nanoparticles. The dielectric permittivity is calculated in accordance with temperature dependence of plasma frequency of silver nanoparticle. The effect of temperature on these structures by incorporating the volume expansion coefficient of nanoparticle is analysed. The behaviors of photonic band gaps with variation of filling factor, radii of nanoparticle and temperature are observed. The evolution of these results leads to designing the desired photonic crystals. © 2015, Electromagnetics Academy. All rights reserved. Source

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