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Dispersion control and active materials integration have yielded plasmonic components including i) three-dimensional single layer plasmonic metamaterials ii) all-optical, electro-optic and field effect modulation of plasmon propagation iii) plasmon-enhanced absorption in solar cells.
We demonstrate that enhanced electro-optical effect in plasmonic microstructures is accompanied by dramatically reduced parasitic scattering of surface waves. Analytical description of relevant physics and implications for creation of high-performance dynamical plasmonic circuits are discussed.
Coherent THz pulses at 328.2 mum were generated by mixing two CO2 laser frequencies based on collinear phase-matched difference-frequency generation in GaSe crystals. The highest average output power was measured to be 260 muW.
We have experimentally studied the pulse-to-pulse instability in Nd:Sc3(BO3)4 random laser. The increase of the instability at the threshold and its reduction at further increase of pumping is in line with the theoretical predictions.
BiB3O6 has been found to be 90deg phase-matchable for type-I and type-2 chi(3) third-harmonic generation at 0.3263 and 0.3837 mum at 20degC. The improved Sellmeier equations that correctly reproduce the new data are presented.
We report on the optical properties of a metal-organic photonic bandgap structure showing a peak transmission ~44% and that enhances the nonlinear optical properties of bulk Copper by up to an order of magnitude.
We introduce a simple procedure for high-Q cavity design in photonic crystal heterostructures. The key parameter in the optimization process is the relative position of the resonant frequency within the mode-gap.
Zero-nmacr bandgap has been observed in photonic superlattices consisting of layered stack of materials with positive index of refraction and photonic crystal slab. An experimental verification of FDTD simulations is reported here.
Ultra-high Q (>5 times 105) microdisk resonators are demonstrated in a SiNx platform at 650 nm with integrated in-plane coupling waveguides on a Si substrate. Critical coupling to first-order radial-mode is demonstrated using pedestal layer to control coupling.
We demonstrate nonlinear compression of 2.5 ps and 1.2 ps laser pulses at 800 nm wavelength using a 35 m tapered hollow-core photonic bandgap fiber with continuously-decreasing dispersion.
We report on the fabrication of a tapered hollow-core photonic crystal fiber with a transition-length as long as 40 m for cascaded Stimulated-Raman-Scattering applications. The structural and optical characterization demonstrates the linearity of the taper.
We report the world-first successful demonstration of widely spaced dual wavelength interband cascade lasers operating simultaneously in continuous wave near 3.5 and 4.5 microns.
We generate a highly-controlled, optically-dense, and repeatable Rb vapor inside of a hollow-core photonic bandgap fiber using light-induced atomic desorption. Here we present its generation dynamics and use for nonlinear quantum optical applications.
Time-resolved electro-absorption is reported for the first time in a GaInNAs quantum well p-i-n waveguide at 1.3 mum. A recovery of 55 ps demonstrates the potential for optical modulator devices.
We demonstrate widely tunable terahertz-wave generation using difference frequency generation (DFG) in an organic N-benzyl-2-methyl-4-nitroaniline (BNA) crystal. The frequency tuning of the BNA-DFG was obtained between 0.1 and 15 THz.
We report non-collinear optical parametric amplification in a bulk KTiOPO4 (KTP) crystal generating ultra-broadband near-IR pulses, that cover simultaneously the wavelength region ~1050-1450 nm with a bandwidth Gt2500 cm-1.
Scheme to realize controlled phase gate through single quantum dot in slow-light silicon photonic crystal waveguide is proposed. Enhanced Purcell factor and beta-factor lead to high gate fidelity over broadband frequencies compared to cavity-assisted system.
We developed a theory to explain record experimental efficiencies of terahertz emission from tilted-front femtosecond laser pulses propagating through electro-optic crystals. This theory predicts optimal pulse parameters and crystal size maximizing the terahertz yield.
We show that quasi-phase-matching corresponding to a propagation in a periodically poled non linear medium at any angle with the grating vector provide wider wavelength tuneability and spectral acceptance. The case of MgO:PPLN is studied.
We report a PPLN crystal with a built-in electro-optic Bragg grating for both temperature-insensitive laser Q-switching and temperature-tuned wavelength conversion with 35% parametric efficiency from 1064 nm to mid-infrared wavelengths between 1440 and 2750 nm.
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