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Applications of various slow light schemes in nonlinear optics are considered. It is shown that most benefits of slow light fade away at high bit rates. A few realistic applications of slow light are identified.
We review the history of semiconductor microlasers, and provide a selective survey of emerging topics in this field covering VCSELs, VECSELs in optically and electrically-pumped formats, and a range of microcavity devices.
Design considerations for quasi-planar, high-Q, silicon-on-insulator microphotonic resonators are presented. A figure of merit for use in comparison between microphotonic designs is presented and applied to compare existing and proposed designs.
We prove that build-up of evanescent surface waves are responsible for the enhanced transmission, by comparing periodic and random arrays of holes punctured in metal and dielectric absorber substrate.
We demonstrate surface plasmon guiding by dielectric nanowaveguides on top of a metal film. Based on this technique, the scale of dielectric waveguide devices can be shrunk by at least an order of magnitude.
We report high transmission through SiC films when a two-dimensional periodic arrangement of subwavelength cylindrical holes is made. We attribute the near-perfect transmission peak inside the polariton gap of SiC to propagating waveguide modes.
3D FDTD is used to study the effect of surface roughening on the emission of a point source embedded in GaAs with a mirror behind the dipole. Enhancement factors of 10 : 1 are observed.
We investigate the fabrication of dielectric components for surface plasmon polariton (SPP) processing by two-photon polymerization of photosensitive materials on metal surfaces. SPP guiding and focussing will be demonstrated using near- and far-field optical microscopy.
Using terahertz magneto-photoconductive spectroscopy, we investigate impurity migration effects in barrier-doped GaAs/AlGaAs quantum wells. A new segregation decay rate for Si impurities in AlGaAs is determined for samples fabricated at low epitaxial growth temperature.
We present new class of waveguides with metamaterial cores. In contrast to conventional structures, our system propagates light on subwavelength scale and provides effective nano-to-micro coupling. The design is scalable from optical to THz frequencies.
Reflectivity measurements of gold nanostructures graded in pitch and aperture size allow investigation of localized plasmons. A simple model confirmed by simulations explains the plasmon resonances. Such arrays are highly suitable Raman scattering substrates.
850 nm AlGaAs-based VCSELs with sub-micron hole arrays on the top of the DBR mirror are presented. The VCSEL exhibits lower threshold current down to 0.5 mA with enhanced optical output power by surface plasmon resonance at the Ag/SiO2 interface consisting the sub-micron metal hole arrays.
Terahertz transmission filters have been manufactured by perforating metal films with various geometric shapes which all support over 99% transmission at specific frequencies determined by geometric shape, symmetry, polarization, and lattice constant.
We discuss carefully characterized semiconductor disk lasers with high spatial and spectral homogeneity, exhibiting 23% conversion efficiency and a 540-mW output power for cw operation. Passive mode-locking with 1.5-ps pulse duration is also demonstrated.
We determine the relative phase between bulk and surface contributions to second-harmonic generation (SHG) from Si(001) by exploiting the difference between right- and left-handed q-polarization, and by frequency-domain interferometric SHG.
Nonlinear optics of surface plasmon polaritons is shown to exhibit qualitatively new features associated with shortness of plasmon wavelength and tight localization of plasmon polariton field near curved metal-dielectric interfaces.
Experiments and computer simulations of high harmonic generation from surface plasmas using femtosecond laser pulses are presented. By increasing the pump intensity above 1019 W/cm2 and varying the plasma scale length the mechanism of harmonic generation are changed.
We are developing a novel reporter for proximity assays based on enhanced lanthanide luminescence promoted by metal nanoparticles. This method should provide high on/off ratios using photostable labels.
We developed an analytical model which calculates the near- & far-field intensity distribution for transmission through sub-wavelength hole-arrays. We modeled with and without plasmons; interference dominates the near-field spatial distribution, plasmons only influence the intensity.
Resonance in a metal-insulator-metal waveguide mode is shown to lead to significant field enhancement and hence surface-enhanced Raman scattering. The results from the propagating waveguide model are consistent with experimental and numerical results.
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