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  • Home
  • Members
    • Alumni
  • Calendar
  • Events
    • Lectures >
      • Industry Perspective Lectures
      • IPS Lectures
      • Student Lectures
      • Alumni Lectures
      • OSA Lectures
    • Outreach Events
    • Women in Photonics Week >
      • WIPW 2019
      • WiPW 2018
      • WiPW 2017
      • WiPW 2016
    • Light Science Workshop >
      • Light Science 2018
      • Light Science 2017
    • Day of Light >
      • Day of Light 2019
      • 2015 Symposium
    • Banquet >
      • Banquet 2022
      • Banquet 2019
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      • Banquet 2014
    • QIS >
      • QIS2022
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    • Social Events
    • Sign-up for Student Talks
  • Education
    • Education Home
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      • Light-Pipes: Controlling Light
      • DIY Holograms
      • Color Mixing
      • LaserComm
      • Fluorescence
    • Classes
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    • Outreach Kits 2020
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Nanoscale Engineered Silicon Imagers

1/28/2020

 
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Nanoscale Engineered Silicon Imagers Reaching Theoretical Limit of Performance and their Applications in Space Exploration and Synergistic Fields
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Dr. Shouleh Nikzad
NASA Jet Propulsion Laboratory


Thursday, January 30th, 11 am, Elings 1605
​NASA’s trend toward less costly missions has created a need for smaller and more capable instruments for in situ planetary applications, space weather, and Earth Observations. The rise of cubesats has created a new powerful platform that if enabled with powerful sensing technology can be an instrument of discovery. At the same time, large aperture UV/visible/Near Infrared space telescope are being planned for cosmology and astrophysics studies that will need high performance yet affordable detectors to populate their very large focal plane arrays. In nearly all these facets of space exploration, there is a strong need for high signal to noise ultraviolet detection technology. This is due to the fact that the ultraviolet part of the spectrum is rich in spectral information that are key to study exo-solar planets, protoplanets, intergalactic medium, supernovae, electromagnetic counterpart of gravitational wave, star formation, galaxy evolution, and more. Semiconductor detectors offer a rich spectral range, tailorable spectral response, high resolution, and sensitivity; however, these capabilities are not available in a single material or class of material. For example, while silicon imagers have reached high performance levels in format, pixel size, and signal to noise, they are naturally insensitive to ultraviolet light. Using non-equilibrium processes, we can manipulate materials at nanometer scale, form unusual and quantum structures, and alter bandstructures. Through nanoscale surface and interface engineering of 2D doping (superlattice doping and delta doping) high performance silicon-based imagers are produced with record high quantum efficiency in the ultraviolet. Furthermore, the response of silicon imagers can be tailored for out of band rejection through nano-scale interface engineering. In this talk we will discuss the underlying physics of the ultraviolet silicon detectors, their performance, their integration in systems, and their application in cubesats and space flagship missions. We will also discuss the synergy between the requirements for instruments in NASA space applications and medical applications and show how space technologies can and have been used for medical applications.
Coffee provided!
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Dr. Nikzad introduces here work at NASA on Si-based UV detectors applications on cubesats.

Student Lecture Series: January 24th 2020 - Jared Kearns

1/22/2020

 
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Blue Semipolar III-Nitride Vertical-Cavity Surface-Emitting Lasers

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Jared Kearns
Nakamura Group
​Materials Dept, UCSB
​
​Blue semipolar (20-2-1) vertical-cavity surface-emitting lasers with ion-implanted apertures and buried tunnel junction apertures (BTJ) are fabricated and compared to show that the BTJ's reduced absorption improves device performance. The effect of changing the out-coupling mirror reflectivity is calculated to project the potential of these devices with minor structural changes. 
Friday, January 24th | 12:00 pm | ESB 2001
Pizza will be provided!

Live Stream of Photonics Online Meetup (POM)

1/9/2020

 
Come and mingle for any sessions during the first all-online photonics conference, the Photonics Online Meetup (POM). The event will be continuously live-streamed between 11am and 4pm in Elings 1605. Refreshments will be served.
The conference will feature internationally renowned scientists as plenary speakers:
  • Prof. Mete Atature (University of Cambridge, UK)
  • Prof. Nader Engheta (University of Pennsylvania, USA)
  • Prof. Mercedeh Khajavikhan (CREOL-University of Central Florida, USA)
The complete program can be found here:
https://sites.usc.edu/pom/program/
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