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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.
We present Purcell-enhanced spontaneous emission of colloidal near-infrared quantum dots in silicon photonic crystal waveguides. The lead sulfide quantum dots demonstrated slow-light enhancement from the large local density of states at the band edge.
We report visible (green) third-harmonic generation in silicon by launching near-infrared picosecond pulses into highly confined photonic crystal waveguides. We demonstrate slow light enhancement of this nonlinear process.
A refractive index sensor was designed as a 1D resonator incorporated in a microfluidic channel, where aqueous solutions were injected. A sensitivity of 480 nm/RIU and a minimum difference of Deltan = 0.002 were determined.
An electrically injected silicon photonic crystal microcavity light source operating at room temperature is demonstrated. The active gain medium consists of PbSe colloidal quantum dots which are embedded in the photonic crystal and whose emission peak is at 1.55 mum. The resonant modes of the microcavity are observed in the device output spectra.
Colloidal PbSe quantum dots (QDs) are site-selectively bound to silicon-based L3 photonic crystal cavities through a robust process consisting of AFM-lithography and surface chemistry techniques. High-contrast cavity-mode emission is observed, indicating good cavity-QDs coupling.
We demonstrate the design, fabrication and experimental characterization of the spatial mode selector that transmit only the second silicon waveguide mode. Nanofabrication results and near field measurements are presented.
A hollow-core photonic crystal fiber (PCF) made of silicon is reported for the first time. The fiber is obtained by converting silica fiber to porous silicon using magnesiothermic reduction.
We demonstrate a strong enhancement and intensity redistribution of dipole emission by a Bloch surface wave at the surface of a periodic silicon nitrite multi-layer.
We investigate the nonlinear power transfer function generated through slow-light enhanced nonlinear absorption in silicon photonic crystal waveguides. Pulse regeneration and error reduction in a 10 Gbit/s data signal are observed for 10 MHz amplitude distortion.
We report on the fabrication of InP-based 2D photonic crystal lasers operating around 1.5 mum at room temperature integrated and evanescently coupled to SOI waveguides. Laser operation is obtained from a line defect structure accurately aligned on top the SOI circuitry.
Using a tapered photonic crystal cavity approach we designed cavities with theoretical Quality factors Q=2times107 and measured experimental Q=7.5times105. Non-linear broadening of the cavity resonance has also been observed.
We present for the first time digital and deterministic control of slow-light in photonic crystal silicon membranes through atomic layer deposition. Supported by ab initio calculations and our earlier advancements, the tuning of the slow group indices and higher-order dispersion characteristics are observed in the chip-scale Mach-Zehnder interferometers, along with control of the surface-state coupling...
We present experimental analysis of weak coupling for monolayer lead sulfide quantum dots coupled to silicon photonic crystal cavities between 4 K and room temperature, as well as power-saturation measurements of dots at 4 K.
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