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Interferometric lithography provides a facile technique for the fabrication of large-areas of nanophotonic structures. Examples of both linear and nonlinear responses will be drawn from plasmonics, metamaterials, and photonic crystals.
We developed a new approach to fabricate high-quality single-crystalline high-index-contrast waveguiding micro- and nanostructures and demonstrated electro-optic modulation at 1.55 mum in waveguides grown from the melt of a recently developed organic material.
O-band InAs/InGaAs quantum-dot (QD) laser-diode has been successfully demonstrated by using sandwiched sub-nano separator (SSNS) structures on GaAs. Improvement of crystal-qualities and enhancement of luminescence intensities were attained for the QD laser by SSNS technique.
A comprehensive theory of couplings between a cavity and different charge configurations in a quantum dot is developed. It is shown that the quantum anti-Zeno effect is essential for the results obtained by QED experiments. The quantum dynamics of the system employing the quantum master equation is analysed. A Stansky-Krastanov InAs QD grown on a GaAs substrate was assumed, and the only first confined...
The heat dissipation time in an InP-based photonic crystal nano-cavity was measured. Our method is based on time-resolved reflectivity of a cw beam coupled through a tapered fiber. Dissipation times around 2 mus were obtained.
We study the coupling of magnetic dipoles, induced in dielectric spheres. The spheres are configured in chains and rings, which also form effective media. The results have applications toward more complicated metamaterials and plasmonic devices.
We design and numerically simulate a photonic crystal waveguide cavity with a nanoslot structure for single nanoparticle trapping. A 135times enhancement of optical gradient trapping force compared to plain waveguide trapping devices has been achieved.
We realize a new scheme for making a direct contact to a two-dimensional (2D) nanorod LED array using the oblique-angle deposition. More importantly, we demonstrate highly efficient carrier injection into the nanorods.
We present the theory and experimental realization of simultaneously localized and strongly coupled optical and mechanical modes in periodic nanostructures. The mechanical properties of localized phonons with Gigahertz frequencies and sub-picogram masses are studied via all-optical measurements.
We characterize the behavior of optical pulse propagation in surfaces covered with silver metal nanoparticles and quantify the dispersion introduced as the pulse propagates.
Progress in fiber design, fabrication and post-processing will be presented as well as recent advances including fibers with nanoscale structure, record fiber nonlinearity and developments in chemical and biological sensing.
A composite cavity QED system, which couples nitrogen vacancy centers in a diamond nanopillar to whispering gallery modes in a silica microsphere and overcomes limitations of earlier diamond nanocrystal based systems, is demonstrated.
We summarize recent work in germanium quantum well physics and devices, in nanophotonic and nano-metallic structures for enhanced photodetection, and in fundamental limits to optical components, for applications such as slow light and optical interconnects to silicon.
We describe an optical network-on-chip built from passive wavelength routing circuits and tunable micro transmitters based on microdisk sources. Operation of the different subcomponents will be demonstrated.
A new cavity-optomechanical system has been developed comprised of two doubly-clamped silicon nitride cantilevers with a 1D photonic crystal etched into them. We will discuss the optical properties of the system and potential applications to solid-state cavity QED with diamond color centers.
We report break-up of cylindrical shell into well-ordered filament arrays by optical-fiber thermal drawing. Enhanced photosensitivity of centimeter-long crystalline-Se nano-filaments is observed and the mechanism is discussed. This work paves a way to in-fiber nanodevices.
We show that evanescent fields of microresonators can be employed for cavity-enhanced high-sensitivity monitoring of nanomechanical motion. This novel scheme opens the path to observing backaction effects using optical gradient forces in the resolved-sideband regime.
We present a novel technique for measuring the characteristics of a cloud of cold atoms by monitoring the spontaneous emission coupled into the guided mode of a nanofiber. We show that the fiber is very sensitive to the atoms close to its surface.
We demonstrate strong optical activity (and circular dichroism) for both microwave and photonic achiral planar metamaterials. The effect arises from extrinsic chirality resulting from oblique incidence of light onto the metamaterial structures.
Investigating with pseudo-spectral time-domain method, we show that resonant scattering characteristics of Ag nanoparticle arrays are attributed to near-field surface magnetic field, instead of enhanced electric field induced by plasmonic coupling.
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