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Journals and Conferences
Micrometer-scale optical cavities are produced by a combination of template sphere self-assembly and electrochemical growth. Transmission measurements of the tunable microcavities show sharp resonant modes with Q factors of >300 and 25-fold local enhancement of light intensity. The presence of transverse optical modes confirms the lateral confinement of… (More)
The properties of layered inorganic semiconductors can be manipulated by the insertion of foreign molecular species via a process known as intercalation. In the present study, we investigate the phenomenon of organic moiety (R-NH3I) intercalation in layered metal-halide (PbI2)-based inorganic semiconductors, leading to the formation of inorganic-organic… (More)
Non-contact bi-directional micropatterning of two-dimensional (2D) layered inorganic-organic (IO) perovskite [(R-NH3)2PbI4, R = organic moiety] thin films by direct laser writing (DLW) has been reported. These 2D materials are in the form of natural multiple quantum well (MQW) structures and show excitonic luminescence at room temperature because of quantum… (More)
We have studied the effect of rapid thermal annealing (RTA) in the context of phase evolution and stabilization in hydrogenated amorphous silicon nitride (a-SiN(x):H) thin films having different stoichiometries, deposited by an Hg-sensitized photo-CVD (chemical vapor deposition) technique. RTA-treated films showed substantial densification and increase in… (More)
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.
Room-temperature strong-coupling has been observed with large Rabi splitting of upto 202meV when layered inorganic-organic multiple quantum wells (IO-MQWs), are embedded in low-Q microcavities. Incorporating exciton-switching hybrid further allows active control of the strong-coupling parameters.
Our conveniently-fabricated spherical-reflector optical cavities with dimensions below 10 microns give localised tunable regions of greatly-enhanced light intensity suitable for applications in atom optics, microlasers, surface-enhanced single molecule detection, and many other research areas
Thin films of CdSe<sub>x</sub>Te<sub>1-x</sub> were deposited by electrodeposition for different compositions of (x). Optical properties of CdSe<sub>x</sub>Te<sub>1-x</sub> films have been studied. Optimized parameters are used to fabricate periodic photonic structures from template assisted electrochemical deposition.
Zinc Alumino Bismuth Borate (ZnAlBiB) glasses doped with different concentrations of samarium (Sm(3+)) ions were prepared by using melt quenching technique and characterized for their lasing potentialities in visible region by using the techniques such as optical absorption, emission and emission decay measurements. Radiative properties for various… (More)