Kevin Chih-Yao Huang

Kevin Chih-Yao Huang

Stanford, California, United States
1K followers 500 connections

About

Creating end-to-end ML and artificial intelligence solutions to achieve better…

Activity

Join now to see all activity

Experience

  • Notable Graphic

    Notable

    San Mateo, California, United States

  • -

  • -

  • -

    Emeryville, CA

  • -

    Emeryville, CA

  • -

    Fremont, CA

  • -

    Fremont, CA

  • -

    Stanford University

  • -

    Stanford University

  • -

    Taipei, Taiwan

  • -

    Stanford University

  • -

    Hillsboro, Oregon

  • -

    Chicago

  • -

    Northwestern University

  • -

    Hillsboro, Oregon

  • -

    Northwestern University

Education

  • Stanford University Graphic
  • -

    Activities and Societies: Optical Society of America, SPIE, The Harmonics a capella, badminton club

  • -

    Activities and Societies: Solar Car Team, Taiwanese American Student Club, Ford Research Grant, Motorola Research Grant, Photography Club, a capella

Licenses & Certifications

Publications

  • Bulk GaN flip-chip violet light-emitting diodes with optimized efficiency for high-power operation

    Applied Physics Letters

    We report on violet-emitting III-nitride light-emitting diodes (LEDs) grown on bulk GaN substrates employing a flip-chip architecture. Device performance is optimized for operation at high current density and high temperature, by specific design consideration for the epitaxial layers, extraction efficiency, and electrical injection. The power conversion efficiency reaches a peak value of 84% at 85 􏰀 C and remains high at high current density, owing to low current-induced droop and low se- ries…

    We report on violet-emitting III-nitride light-emitting diodes (LEDs) grown on bulk GaN substrates employing a flip-chip architecture. Device performance is optimized for operation at high current density and high temperature, by specific design consideration for the epitaxial layers, extraction efficiency, and electrical injection. The power conversion efficiency reaches a peak value of 84% at 85 􏰀 C and remains high at high current density, owing to low current-induced droop and low se- ries resistance.

    Other authors
    See publication
  • Electrically driven subwavelength optical nanocircuits

    Nature Photonics

    Metal-dielectric-metal (MDM) waveguides for surface-plasmon-polaritons (SPPs) exhibit single-mode operation without cutoff, strong spatial confinement and field enhancements for optical light while accommodating simultaneous electrical functions. These desirable properties allow optical energy confined within the slot to interact strongly with the sandwiched semiconductor materials for enhanced absorption and tailored emission into desired modes or directions. Here, we demonstrate for the first…

    Metal-dielectric-metal (MDM) waveguides for surface-plasmon-polaritons (SPPs) exhibit single-mode operation without cutoff, strong spatial confinement and field enhancements for optical light while accommodating simultaneous electrical functions. These desirable properties allow optical energy confined within the slot to interact strongly with the sandwiched semiconductor materials for enhanced absorption and tailored emission into desired modes or directions. Here, we demonstrate for the first time, electrical generation of three-dimensionally (3D) confined slot MDM SPPs with a cross-sectional mode area of 0.016 λ2 and propagation length of ~ 8 μm. We fabricated metal-clad cavity nano-light-emitting diode (n-LED) based on InGaAs/ GaAs quantum well which is directly coupled to a suspended symmetric Au MDM slot waveguide. Our plasmon-emitting diodes (PED) can achieve high coupling efficiency and packing density. The platform support two-dimensional (2D) routing, splitting and directional coupling of SPPs which will enable optical nano-circuits for interconnects and high throughput sensing in nanometric volumes.

    Other authors
    See publication
  • Antenna electrodes for controlling electroluminescence

    Nature Communications

    Optical antennas can control the radiation from optically excited quantum emitters by modifying the local density of optical states via the Purcell effect. A variety of nanometallic antennas have been implemented to enhance and control key photoluminescence properties, such as the decay rate, directionality, and polarization. However, their implementation in active devices has been hampered by the need to precisely place emitters near an antenna and to efficiently excite them electrically. We…

    Optical antennas can control the radiation from optically excited quantum emitters by modifying the local density of optical states via the Purcell effect. A variety of nanometallic antennas have been implemented to enhance and control key photoluminescence properties, such as the decay rate, directionality, and polarization. However, their implementation in active devices has been hampered by the need to precisely place emitters near an antenna and to efficiently excite them electrically. We realize antenna-electrodes which for the first time facilitate simultaneous operation as electrodes for current injection into nanoscale light-emitting diodes and as antennas capable of optically manipulating the electroluminescence. We illustrate design methodology for antenna-electrodes capable of effectively couple the emission from excitons to antenna modes by confining their electrical excitation to the antenna's vicinity. This work spurs the development of densely-integrated, electrically-driven light sources with unconventional emission properties.

    Other authors
    See publication
  • Power flow from an emitter near an optical antenna

    Optics Express

    Current methods to calculate the emission enhancement of a quantum emitter coupled to an optical antenna of arbitrary geometry rely on analyzing the total Poynting vector power flow out of the emitter or the dyadic Green functions from full-field numerical simulations. Unfortunately, these methods do not provide information regarding the nature of the dominant energy decay pathways. We present a new approach that allows for a rigorous separation, quantification, and visualization of the emitter…

    Current methods to calculate the emission enhancement of a quantum emitter coupled to an optical antenna of arbitrary geometry rely on analyzing the total Poynting vector power flow out of the emitter or the dyadic Green functions from full-field numerical simulations. Unfortunately, these methods do not provide information regarding the nature of the dominant energy decay pathways. We present a new approach that allows for a rigorous separation, quantification, and visualization of the emitter output power flow captured by an antenna and the subsequent reradiation power flow to the far field. Such analysis reveals unprecedented details of the emitter/antenna coupling mechanisms and thus opens up new design strategies for strongly interacting emitter/antenna systems used in sensing, active plasmonics and metamaterials, and quantum optics.

    Other authors
    See publication

Honors & Awards

  • Northwestern University Bachelor of Science Summa Cum Laude

    Northwestern University

  • Department of Energy Computational Science Graduate Research Fellowship

    Department of Energy

    Fellows in the Department of Energy Computational Science Graduate Fellowship (DOE CSGF) program are using high performance computing to better understand fundamental properties of the world and universe around us, and to solve complex problems in areas of national importance, such as climate change and sustainable energy sources.

  • Stanford University Electrical Engineering Departmental Fellowship

    Stanford University Electrical Engineering Department

  • National Science Foundation Graduate Research Fellowship

    National Science Foundation

    The purpose of the NSF Graduate Research Fellowship Program (GRFP) is to help ensure the vitality and diversity of the scientific and engineering workforce in the United States. The program recognizes and supports outstanding graduate students who are pursuing research-based master's and doctoral degrees in fields within NSF's mission. The GRFP provides three years of support for the graduate education of individuals who have demonstrated their potential for significant achievements in…

    The purpose of the NSF Graduate Research Fellowship Program (GRFP) is to help ensure the vitality and diversity of the scientific and engineering workforce in the United States. The program recognizes and supports outstanding graduate students who are pursuing research-based master's and doctoral degrees in fields within NSF's mission. The GRFP provides three years of support for the graduate education of individuals who have demonstrated their potential for significant achievements in science and engineering research. The ranks of NSF Fellows include numerous individuals who have made transformative breakthroughs in science and engineering research, many who have become leaders in their chosen careers, and some who have been honored as Nobel laureates.

Languages

  • English

    Native or bilingual proficiency

  • Chinese

    Native or bilingual proficiency

Recommendations received

3 people have recommended Kevin Chih-Yao

Join now to view

More activity by Kevin Chih-Yao

View Kevin Chih-Yao’s full profile

  • See who you know in common
  • Get introduced
  • Contact Kevin Chih-Yao directly
Join to view full profile

Explore collaborative articles

We’re unlocking community knowledge in a new way. Experts add insights directly into each article, started with the help of AI.

Explore More

Add new skills with these courses