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Monolithic integration of a photonic crystal laser and a passive waveguides via selective quantum well etching are demonstrated. Coupling efficiency between photonic crystal cavity and waveguide is investigated numerically.
We present an electroforming transparent conductive electrode that enables current injection from metal to semiconductor, by forming conducting filaments (CFs) in wide-bandgap materials such as silicon nitride, and employ it as an n-type electrode for GaN-based vertical light-emitting diodes to investigate the effect of the CF densities on the electrical and optical characteristics in VLEDs.
Dense photonic integration requires miniaturization of materials, devices and subsystems, including passive components (e.g., engineered composite metamaterials, filters, etc.) and active components (e.g., lasers, modulators, detectors). This paper discusses passive and active devices that recently have been demonstrated in our laboratory and design, fabrication and testing of nanolasers constructed...
Optical sub-assemblies for 100G Ethernet transceivers are presented. Compact and low cost 100G TOSA and ROSA for the second generation CFP2 type transceivers are designed and fabricated.
This paper describes a novel tweezing system using cavitational microstreaming flows generated by acoustically oscillating twin bubbles for non-contact micromanipulation. A tweezing system with a single acoustically oscillating bubble attached on the tip of a rod integrated with a three-dimensional traverse system is firstly tested to manipulate a fish egg (1 mm diameter) in an aqueous medium. Although...
We demonstrate novel detuned dual-mode laser for tunable continuous-wave terahertz generation with InGaAs-based photomixers. The beat frequency from this dual-mode multisection laser is continuously tuned from 0.30 to over 1.15 THz.
A major challenge in cell replacement therapy for neurological diseases is the sorting of differentiated neurons because conventional cell sorting techniques require cells in suspension. Recently, spherical glass beads have been demonstrated as a movable growth substrate, allowing transport of differentiated neurons without dissociation. Phototransistor-based optoelectronic tweezers provides a gentle...
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