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Transparent glass-ceramics, activated by luminescent species, present an important class of photonic materials because their specific optical, spectroscopic and structural properties. Several top-down and bottom-up techniques have been developed for transparent glass ceramic fabrication. Among them, laser material processing plays an important role and many significant results have been obtained in...
Intense optical field strengths result from redistributed photon density of states in hybrid metal-dielectric photonic crystals and microcavity structures are probed through spectral domain and angle resolved Raman scattering studies.
This paper focuses on SRMSAT STRUCTURE BUS which is a standardized Nano-Satellite structure bus. It provides a standard platform for a wide variety of missions in LEO and can be realized in a very short developmental period. The bus was designed and developed for SRMSAT, the SRM University (Sri Ramaswamy Memorial University) student Nano-Satellite, by the undergraduate students and faculty of SRM...
Graphene oxide-ZnO/TiO2 nanoparticles are synthesized for optical limiting. Micro Raman studies reveal that GO sheets are limited to 6–8 layers. UV-Vis and FTIR results demonstrated that GO with ZnO/TiO2 nanoparticles are successfully conjugated.
Large enhancement in nonlinear absorption (NLA) was observed in 1-D photonic crystal containing ZnO defect fabricated by rf sputtering. The enhancement in NLA is due to the strong confinement of the optical field around the defect layer.
High quality inverse opal structures are synthesized from the photorefractive SnO2 medium by a simple two step infiltration and calcination process. Optical characterization reveals the high index contrast and applications of them in the field of sensors and integrated optics.
The spectral characteristics of (111) stop band of 3D polystyrene colloidal photonic crystals with s-, p- and un-polarized light in the reflection geometry were carried out and compared with the calculated band diagrams using plane wave expansion method.
New classes of erbium-doped silica-based planar waveguides are fabricated by the uniform deposition of photorefractive, low-phonon energy SnO2 with 25% maximum molar composition. The optical properties reveal low attenuation coefficient of 0.5±0.2 dB/cm at 1.54µm.
We experimentally demonstrate the observation of the spectral modulations due to spectral correlation of the white-light continuum generated from the collinear filaments using focused femtosecond laser pulses in BK7. These spectral modulations are used to estimate the temporal separation of the refocused collinear filaments as a function of the input laser power.
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