Arul Anandar College Autonomous

Madurai, India

Arul Anandar College Autonomous

Madurai, India

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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.


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.


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.


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.


Wilson K.S.J.,Arul Anandar College Autonomous | Revathy V.,Arul Anandar College Autonomous
Indian Journal of Physics | Year: 2015

We analyze theoretically, the effect of temperature dependence on dielectric permittivity of nanocomposite of silver nanoparticle embedded in SiO2. The dielectric permittivity is calculated in accordance with the temperature-dependent plasma frequency of silver nanoparticle. We investigate this effect by changing the radii of spherical nanoparticle and the filling factor by incorporating the temperature-dependent volume expansion coefficient of nanoparticle. The width of the frequency range, in which the real part of the dielectric permittivity becomes negative, is studied. The variation of dielectric permittivity with frequency is also studied. The temperature-dependent plasma frequency is implemented in multilayer structures for tuning their optical properties, which is used for designing optical filters, sensors etc. © 2015, Indian Association for the Cultivation of Science.


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.


Joseph Wilson K.S.,Arul Anandar College Autonomous | Malarkodi A.,Arul Anandar College Autonomous | Revathy V.,Arul Anandar College Autonomous
International Journal of ChemTech Research | Year: 2014

The variation of dielectric constant with temperature of bulk materials like CaTiO3 & BaTiO3 are analysed. Hence, the phonon polariton dispersion of the Dielectric-Ferroelectric (CaTiO3/BaTiO3) superlattice is studied. The presence of modes in the Polaritonic gap are investigated. It is found that these polariton modes in the forbidden gap are tuned by applying external perturbations. © 2014-2015, Sphinx Knowledge House. All rights reserved.


Revathy V.,Arul Anandar College Autonomous | Wilson K.S.J.,Arul Anandar College Autonomous
Asian Journal of Chemistry | Year: 2013

Several optical properties of crystals are modified due to non-linearity associated with high intensity of the incident radiation. In the present work, we explore the possibilities of nonlinear effects in the optical parameters especially in the polariton behaviour of certain optoelectronic materials like LiNbO3 and LiTaO3. A new mode on the polaritonic gap, where the propagation of electromagnetic wave is forbidden, is obtained in these materials as suggested by some recent literature. It is also extend to superlattice system. The effect on nonlinear interactions of phonon polaritons in LiNbO3/LiTaO3 superlattices is discussed. Various modes of polariton dispersion is also analyzed. © Asian Journal of Chemistry 2013.

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