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Electromagnetically induced transparency is observed in rubidium-filled kagome structure hollow-core PCF with polymer-coated core. We show that the 6 MHz transparency linewidth is below that expected from a bare fiber.
Amplified femtosecond laser pulses are coupled through a hollow-core photonic band-gap fiber with efficiencies greater than 98%. Peak power intensities greater than 1014 W/cm2 are achieved inside the fiber core.
Recent measurements on the unique quantum nature of a single-quantum-dot strongly coupled to a photonic-crystal nanocavity highlight two apparent mysteries. Here we introduce and exploit a quantized medium-dependent theory to help explain these mysteries.
We have fabricated and characterized polymeric three-dimensional layer-by-layer chiral photonic crystals. The obtained circular dichroism from polarization stop bands centered around 1.55 mum is comparable with that of recently demonstrated circular-spiral photonic crystals.
An optically tunable narrowband reflectance filter is fabricated on a plastic substrate over large surface areas using nanoreplica molding. The reflection peak wavelength was tuned -25 nm using an optically active azobenzene liquid crystal film.
We utilized simultaneous coupling of higher and ground states of a single QD with two different resonant modes of a PhC nanocavity for efficient excitation and emission. Enhanced emission with strongly suppressed background was demonstrated.
Photonic crystal fibers were demonstrated as an optimal platform for enhancing the Raman signals to study nanoparticles properties in liquids. Raman was used to analyze stages of low concentrations of ZnO nanoparticles growth in solution.
We describe a scalable nanocavity array, with single quantum dots, for universal single-operation N-qubit quantum gate. A single two-level system controls the lineshapes, departing from optical-analog of electromagnetically-induced-transparency, with high fidelity and low photon loss.
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.
An InGaN/GaN thin-film light-emitting diode with the photonic crystal (PhC) on the surface and a TiO2/SiO2 omnidirectional reflector on the bottom was fabricated and found the line-width emission spectrum of 5 nm by the PhC.
We studied the spatio-temporal behavior of the carriers in photonic crystal nanocavities and showed that diffusion enables fast switching, which is the advantage of nanocavity switches over other larger optical switches.
We integrated into GaN LEDs both two-dimensional photonic crystal patterns and angled sidewall deflectors. The resultant devices exhibited about three-fold enhancement in vertical emission intensity when compared with the planar reference LED device.
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 on a technique to pattern the shape of the core surround of hollow-core PCF. Different shapes were fabricated and a relationship between surface mode positions and core surround thickness is experimentally observed.
A new kind of hollow core photonic crystal fiber (HC-PCF) for broadband guidance is introduced. Structural and optical properties of a fabricated example are detailed.
We fabricated photonic crystal nanocavities to enhance erbium (Er) emission in silicon rich nitride nanocrystals. We observed experimental quality factors of ~6000 and 20-fold enhancement, in agreement with numerical calculations of the Purcell effect.
We report the first room temperature CW operation of two dimensional single-mode edge-emitting photonic crystal Bragg lasers. Single-mode lasing with single-lobed, diffraction limited far-fields is obtained for 100mum wide and 550 mum long on-chip devices.
We demonstrate a bowtie geometry in a silicon planar resonator with an ultra-small modal volume .01(lambda/2n)3. Bowtie, ring resonators and 1D and 2D photonic crystal resonators are compared for tradeoffs in confinement and quality factors.
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