category » Optics & Photonics

Flexible High-Resolution Neural Recording Arrays
  • Lack of technology for high-throughput electronic recordings and simultaneous stimulation is a major limiting factor for the development of neuroprosthetics…


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Graphene Infrared Photodetectors
  • Graphene is a two-dimensional (2D) material that has attracted great interest for electronic devices since its discovery in 2004 [1]…


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Automated Wavelength Recovery for Microring Resonators
  • Silicon photonics is poised to meet the increasing demand for high-bandwidth, low-power, and densely integrated optical communications in CMOS-compatible environments….


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Adiabatic Resonant Microring (ARM) Modulator
  • High-performance devices and systems based on CMOS-compatible silicon photonics are increasingly gaining momentum in the optical interconnects community as essential…


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Quantitative Analysis and Modeling of Templated Solid-state Dewetting of Thin Single-crystal Ni Films
  • Because thin films are usually unstable in the as-deposited state, at sufficiently high temperatures atomic motion will occur and lead…


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A Monolithic Electronic-photonic Integration Platform in Commercial 45-nm SOI
  • Integrated photonic interconnects present a disruptive alternative to electrical I/O for many VLSI applications, with potential for superior bandwidth density…


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DSENT–A Tool for Modeling Opto-electronic Networks-on-Chip
  • With the rise of many-core chips that require substantial bandwidth from the network-on-chip (NoC), integrated photonic links have been investigated…


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Integrated Magnetooptical Isolators
  • We have experimentally demonstrated a monolithically integrated ultra-compact optical isolator on silicon. This device allows a significant device footprint reduction…


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Simulation of Two-dimensional Core-shell Structures for Broadband Solar Cell Absorption
  • Solar cells with broadband absorption and large acceptance angle are demonstrated by using two-dimensional core-shell structures, which are composed of…


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Photonic Crystals on Erbium-doped Tellurite Thin Films for Broadband-enhanced Photoluminescence at near Infrared
  • Two-dimensional photonic crystals (PhCs) are fabricated using dual-beam focused ion beam (FIB) in Er3+-TeO2 thin films and demonstrate broadband enhancement…


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Development of Terahertz Quantum-cascade Lasers
  • The terahertz frequency range (1-10 THz) has long remained undeveloped, mainly due to the lack of compact, coherent radiation sources….


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Hot Carrier-Assisted Intrinsic Photoresponse in Graphene
  • The photoresponse of semiconductors, which determines the performance of optoelectronic devices, is governed by energy relaxation pathways of photoexcited electron-hole…


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Studies of Light Extraction in GaN Nanowire-based Light-emitting Diodes
  • Nanowires are an exciting architecture for light emitting diodes (LEDs). To address the challenges of solid state lighting, III-V nitride…


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Scalable 3-D Microelectrode Recording Architectures for Characterization of Optogenetically Modulated Neural Dynamics
  • Optogenetics is commonly used for precision modulation of the activity of specific neurons within neural circuits [1] , but assessing…


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Co-axial Recess-integration of 1.55-µm Edge-emitting Laser Diodes with SiOxNy Waveguides on Silicon
  • We have demonstrated for the first time in-plane InGaAs/InP laser diodes recess-integrated with SiON waveguides on silicon substrates using a…


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Magnetically-assisted Assembly, Alignment, and Orientation of Micro-scale Components
  • The use of magnetic forces to improve fluidic self-assembly of micro-components has been investigated using Maxwell 3D to model the…


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Recess Integration of Vertical-cavity Surface-emitting Laser Pills and Edge-emitting Laser Platelets on Si
  • Optoelectronic devices intimately integrated on silicon integrated circuits have long been sought for optical intercon-nect applications, optical communications modules, and–more…


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Waveguide Micro-probes for Optical Control of Excitable Cells
  • Professor Ed Boyden uses light to precisely control neural activity.  His lab has invented safe, effective ways to deliver light-gated…


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Thin-Film Crystalline Silicon Solar Cells Enabled by Sub-micrometer Surface Light-Trapping Structures
  • The cost of silicon solar cells has fallen precipitously in recent years, primarily as a result of manufacturing improvements, increasing…


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Progress in Multichannel Guided-wave Devices for Display Applications
  • In this research we seek to develop acousto-optic, guided-wave modulators in proton-exchanged lithium niobate for use in holographic and other…


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A Novel Sublimable Mask Lift-off Method for Patterning Thin Films of Organic Semiconductors
  • Photolithography’s accuracy and scalability have made it the method for sub-micron-scale definition of single-crystal semiconductor devices for over half a…


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Single-photon Detection up to 5-micron-wavelength with Superconducting Nanowire Single-photon Detectors
  • We report on the detection of single-photons in the middle-infrared (mid‑IR) range using superconducting nanowire single-photon detectors (SNSPDs). In 2011…


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Microwave Spectroscopy using Microfabricated Superconducting Ion Traps
  • In recent years, several ion-trapping groups have shown that microwave electrodes integrated into surface electrode ion traps can be used…


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Cavity-integrated Ultra-narrow Superconducting Nanowire Single-photon Detector Based on a Thick Niobium Nitride Film
  • Superconducting nanowire single-photon detectors (SNSPDs) [1] , based on 100-nm-wide, ~ 4-nm‑thick niobium nitride (NbN) nanowires, are unmatched in sensitivity [2]…


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Development of Nanostructured Optical Field Emitter Arrays
  • We are interested in the application of arrays of electron field emitters, which can be achieved from a variety of…


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Position Readout of a Superconducting Nanowire Single-photon Detector Array by Inductive Current-splitting
  • Single pixels of superconducting nanowire single photon detector (SNSPD) have high detection efficiency, low dark-count rate, and low timing jitter….