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We have demonstrated bulk (51 mum thick) photonic metamaterial based on anodized alumina membranes filled with silver. The material is highly anisotropic and follows the hyperbolic dispersion law at lambda>0.84 mum.
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 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.
Structuring the core of a photonic crystal fiber is used to fulfill the phase-matching condition required for broadband intermodal four-wave mixing. Experimental data show efficient red generation on LP01 mode from 1064 nm pumping.
We experimentally demonstrate a picogram-scale optomechanical system that increases its mechanical rigidity by more than 5times with the application of mW-level optical power. We discuss the theory and fabrication, making comparisons to existing optomechanical systems.
We report helicoidal long-period grating by twisting photonic crystal fiber under CO2 laser irradiation and investigated its novel characteristics. The fabricated PCF-LPG endows unique resonance tuning capability with low polarization-dependent loss and thermal shift.
A hollow-core fiber exhibiting three transmission windows from the NIR to the UV was designed and characterized. A good agreement between computed and measured loss was obtained. 2 dB/m loss was demonstrated at 0.355 mum-wavelength.
Control of optical pulse at visible region is directly demonstrated using pulse trapping by soliton pulse in photonic crystal fibers. Wavelength of trapped pulse is continuously blue-shifted from 0.53 to 0.45 um by power control.
Guided acoustic wave Brillouin scattering (GAWBS) in PCFs is altered by the air-silica structure of the inner cladding and does not depend on the cladding diameter as with standard fibers. This dependence is investigated.
We demonstrate a novel ultra-fast high-contrast switching mechanism of two-level atoms driven by milliwatt picosecond pulse trains in PBG circuits with step-shaped density of states profiles. Possible application as low-threshold, multi-wavelength-channel all-optical transistors is discussed.
Temporal characteristics of band-edge photonic crystal lasers were explored with high resolution up-conversion system. The InGaAs/InP photonic crystal laser operates at room temperature at 1.55 mum with temporal responses indicating modulation speeds greater than 25 GHz.
Ultra-high-Q modes are designed in woodpile photonic crystal by modulating the unit cell size along a waveguide in complete photonic band gap. We propose to fabricate the nanocavities with a two-directional etching without wafer bonding.
Three-dimensional icosahedral dielectric photonic quasicrystals previously revealed highly structured transmittance spectra and unusual photon transport properties. Using a periodic approximant approach, we show that all these findings are consistent with multiple scattering of light.
A pump combiner with single-mode PM signal feed-through designed for an air-clad photonic crystal fiber is demonstrated. Signal coupling is realized by a novel taper element allowing single-mode guidance at a taper ratio of 3.7.
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 demonstrate a multi-spectral polarization sensitive mid-infrared photodetector utilizing surface-patterned plasmonic resonators. This design provides a responsivity enhancement of up to 5x while adding only one lithography step to current focal plane array processing.
Optical microcavites fabricated by etching whispering gallery mode and photonic crystal structures in a high-index gallium phosphide layer and an underlying single-crystal diamond substrate are studied experimentally and theoretically.
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 demonstrate all-optical modulation via ultrafast optical carrier injection in a GaAs photonic crystal cavity using a degenerate pump-probe technique. The low switching(absorption) energy~120 fJ(10 fJ), and fast response(~15 ps), limited only by carrier lifetime, suggest practical all-optical switching applications.
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