Thursday, Jan. 17th, 12 pm, ESB 1001
If you're interested in joining, get a head start by joining one of our parent professional organizations: IEEE Photonics Society, OSA, or SPIE!
Coherent Ising machine: a photonic Ising model solver based on degenerate optical parametric oscillator network
Friday, Jan 18, 12 – 1 pm, Elings 1605
As various systems and networks in our society grow larger and more complex, analysis and
optimization of such systems are becoming increasingly important. Such tasks are classified as combinatorial optimization problems, which are generally difficult to solve with current digital computers. It is well known that combinatorial optimization problems can be converted to ground-state-search problems of the Ising model, a theoretical model for the interacting spins. Recently, several approaches to find solutions to the Ising model using artificial spin systems have been studied intensively. A coherent Ising machine (CIM) is one of such systems in which degenerate optical parametric oscillators (DOPO) pulses are used as artificial spins. By using a long-distance (typically 1 km) fiber cavity that contains a phase sensitive amplifier based on a periodically poled lithium niobate waveguide, we can generate thousands of DOPO pulses multiplexed in time domain. Since a DOPO phase only takes either 0 or p at above threshold, we can stably express an Ising spin with a DOPO by allocating phase 0 (p) as spin up (down). The “spin-spin interaction” can be implemented by using a measurement-feedback scheme, with which we can effectively realize mutual injection of lights among thousands of DOPO pulses. The networked DOPOs are most likely to oscillate at a phase configuration that best stabilize the whole network, which gives the solution to the given Ising problem. Based on this scheme, we realized a CIM with all-to-all-coupled 2000 DOPO pulses, by which we could find good solutions to 2000-node combinatorial optimization problems in less than 100 microseconds. In the talk, I will describe the basic principle and the experimental details of the CIM, as well as our effort for finding its applications.
Tuesday, Dec. 11th at 12:00 PM in Elings 3001
Pizza will be provided!
Tuesday Dec. 4th at 12:30 pm in ESB 1001
Pizza will be provided!
This is the start of the weekly student lecture series IEEE Photonics is hosting throughout Winter 2019! Ryan DeCrescent and Robert Zhang will be presenting their talks.
Wednesday November 28th, 2 pm, ESB 1001
Alex is an entrepreneur with a track record of building teams that take ideas from the research
laboratory through commercialization. Alex was a co-founder, the CEO, and Board Director
of Aurrion from 2008-2016 which was a fabless semiconductor company that developed photonic integrated circuits for data center networking applications. The business was acquired by Juniper Networks. Alex worked for IBM, Lawrence Livermore National Laboratory, and Intel prior to founding Aurrion. Alex earned his M.S & Ph.D. from UCSB and is an alumnus of the Harvard Business School Owner/President Management Program. In his downtime, Alex enjoys riding off road motorcycles, playing guitar, smoking meat and reading books. Alex loves spending time with his wife and daughter going to live shows, travelling and eating weird stuff.
Dr. Ken-Tye Yong
Director of the Bio Devices and Signal Analysis (VALENS)
School of Electrical and Electronic Engineering
Nanyang Technological University (NTU)
Tuesday, Nov. 20th, 3 - 4 pm, ESB 2001
Nanomaterials have been applied in healthcare applications such as cancer imaging, lymph node mapping and brain diseases therapy. These nanomaterials can be engineered to serve as a platform for challenges in highly sensitive optical diagnostic tools, biosensors, and guided imaging and therapy. The versatility of nanomaterials may provide the keys to improve diagnostics and therapy of human diseases. In this talk, we will highlight the use of nanomaterials with different sizes, compositions, and shapes for nanomedicine applications. This talk is intended to promote the awareness of past and present developments of nanomaterials in biomedical fields, the potential toxicity of nanomaterials, and the approaches to engineer new types of safe nanomaterials, whereby encouraging researchers to think about exciting and promising biophotonic and nanomedicine applications with nanomaterials in the future.
Friday Nov 9th, 1pm, Elings 1605
The past decade has seen accelerated progress in III-V semiconductor infrared photodetector technology. The advent of the unipolar barrier infrared detector device architecture has in many instances greatly alleviated generation-recombination (G-R) and surface-leakage dark current issues that had been problematic for many III-V photodiodes. Meanwhile advances in a variety type-II superlattices (T2SLs) such as InGaAs/GaAsSb, InAs/GaSb, and InAs/InAsSb, as well as in bulk III-V material such as InGaAsSb and metamorphic InAsSb, have provided continuously adjustable detector cutoff wavelength coverage from the short wavelength infrared (SWIR) to the very long wavelength infrared (VLWIR). The confluence of these developments has led to a new generation of versatile, cost-effective, high-performance infrared detectors and focal plane arrays based on robust III-V semiconductors, providing a viable alternative to HgCdTe (MCT).
Women in Photonics 2018
Freedom Photonics Tour
Friday Oct. 27th, 3:30pm – 5:00pm
Location: 41 Aero Camino, Goleta, CA 93117 (map)
Age Limit: Junior High and up
The women at Freedom Photonics hosted hands-on photonics (light-science) demos and gave a tour of their cleanroom.
– 3:30pm – 3:45pm: Welcome & Check-In
– 3:45pm – 4:15pm: Presentation (open to public)
– 4:15pm – 5:00pm: Cleanroom Tour (U.S. Persons ONLY)
UCSB NanoFab Tour
Mon. Oct. 23rd, 3:30pm – 5:30pm
Tour Location: UCSB Engineering Sciences Building (map),
Age Limit: Grade 6 and up
UCSB Scientists gave tours of the UCSB Nanofabrication Facility, where many types of cutting-edge microchips are produced. Women leading the tours talked about the light-science research they perform in the facility, and attendees got to gown up in "bunny suits" and go inside the cleanroom.
– 3:30pm – 3:45pm: Welcome & Introduction
– 3:45pm – 4:15pm: Tour outside the cleanroom
– 4:15pm – 5:00pm: Tour inside the cleanroom (groups of 5)
Sat. Oct. 28th, 9:30am – 3:00pm
Location: UCSB Student Resource Building, Room 1120 (map)
Women in Grades 9 – 12
Organized by UCSB's Women In Science & Engineering (WISE) group, I ❤️ STEM is a one-day conference for women in 9-12th grades. UCSB scientists & graduate students held hands-on workshops on numerous scientific disciplines, including photonics, the science of light.
Victoria Rosborough & Takako Hirokawa of the Photonics Society @ UCSB hosted a light-science workshop at the conference!
The Girls Inc. science activity is being held at the Teen Center at Girls Inc. Goleta, for girls who are already part of this group.
This year, women scientists hosted our new hands-on science activity "Color Mixing", which teaches students about how we see color, and how we can use only three ink colors to reproduce all the colors of the rainbow.
When: Friday, June 9, 12:00PM
Lunch will be provided
Abstract: The excitement of nanowire research is due to the unique electronic and optical properties of these nanostructures. Both axial and radial heterostructure nanowires have been proposed as nano‐building blocks for the next generation devices, which are expected to revolutionise our technological world. The unique properties stem from their large surface area‐to‐volume ratio, very high aspect ratio, and carrier and photon confinement in two dimensions. These nanowires are usually grown by the so‐called vapor‐liquid‐solid mechanism, which relies on a metal nanoparticle to catalyze and seed the growth. An alternative technique to grow the nanowires is by selective area growth technique, where a dielectric mask is first patterned on the substrate prior to growth. In this talk, I will present an overview of compound semiconductor nanowire research activities at The Australian National University. The optical and structural properties of binary and ternary III‐V nanowires including GaAs, InGaAs, InP and GaAsSb nanowires grown by metal‐ organic vapour phase epitaxy will be presented. Various issues such as tapering of the nanowires, compositional non‐uniformity along nanowires, crystal structure, carrier lifetime and polarization effect will be discussed. I will also present our results of III‐V nanowires grown on Si substrates which are of great interests for the integration of nano‐optoelectronic devices on Si platforms. Our results of enhancing the quantum efficiency of nanowires by using plasmonics are promising to improve the performance of nanowire devices. Finally, the results from our nanowire lasers, photodetectors, solar cells and photoelectrodes for water splittng will be presented.
Bio: Professor H. Hoe Tan is currently the Head of the Department of Electronic Materials Engineering at the Research School of Physics and Engineering, The Australian National University. He received his B.E. (Hons) in Electrical Engineering from the University of Melbourne in 1992, after which he worked with Osram in Malaysia as a quality assurance engineer. In 1997, he was awarded the PhD degree from the Australian National University for his dissertation on "Ion beam effects in GaAs‐AlGaAs materials and devices". He has been the past recipient of the Australian Research Council Postdoctoral, QEII and Future Fellowships. He has published/co‐published over 350 journal papers, including four book chapters. He is also a co‐inventor in 4 US patents related to laser diodes and infrared photodetectors. His research interests include epitaxial growth of lowdimensional compound semiconductors, nanostructured optoelectronic devices and ion‐ implantation processing of compound semiconductors for optoelectronic device applications. Prof. Tan is a Senior Member of the IEEE.
Location: UCSB, Engineering Science Building, Rooms ESB1001, ESB 2001, ESB 2003
The presentations will have two tracks: Technical and non-technical. The Technical Track will feature lectures on cutting-edge research in the area from varying fields that use and manipulate light. The Non-Technical Track will focus on careers in the industry and professional development. Keep checking back on this page for the most up-to-date information!
The event is free for those affiliated with a university or college. Otherwise, general admission to the event is $20.
|9:30AM — 10:30AM||Introduction and keynote speech by Dr. Kevin Riley (ESB 1001)
Seeing Heat: Thermal Vision Everywhere you look
|10:30AM — 12:30PM||Track #1 (ESB1001): Technical oral presentation sessions||Track #2 (ESB2001): Non-Technical oral presentation sessions|
|12:30PM — 1:30PM||Lunch Break (ESB courtyard)|
|1:30PM — 3:30PM||Track #1 (ESB1001): Technical oral presentation sessions||Track #2 (ESB2001): Non-Technical oral presentation sessions|
|3:30PM — 4:00PM||Snack Break|
|4:00PM — 6:00PM||Poster session (ESB1001)||Job fair (ESB courtyard)|
|6:00PM — 7:30PM||Invite-only cocktail hour|
Keynote Speech — Seeing Heat: Thermal Vision Everywhere You Look
Location: ESB 1001
Time: May 10, 2017 9:30 AM -- 10:30 AM
Abstract: Santa Barbara is a world leader in developing infrared technology. Companies on the Central Coast today are developing thermal cameras for a multitude of consumer and industrial applications – from smartphones to automobiles. These and many other applications will be ubiquitous in the next 5-7 years. This market is heating up !
Biography: Dr. Kevin J. Riley served as President of Teledyne Scientific & Imaging, LLC (TS&I) from 2007-2012. Dr. Riley joined TS&I in January 2007 from Raytheon where he led technology strategy & roadmaps, IR&D planning and CRAD program capture as Vice President of Technology for Raytheon’s Network Centric Systems business unit. He has served on numerous Scientific Advisory Boards including: Executive Committee Network Centric Operations Industry Consortia; AFRL MANTECH Industry Advisory Panel; National Team Aeronautics Research & Development; Aviation Week Net Centric Operations Committee; Advisory Executive in MIT/ARMY Institute for Soldier Nanotechnology; Panelist Defense Systems Management College; Strategic Focus Group for PEO GCSS and Military Sensing Symposia Infrared Detector Advisory Group. Dr. Riley is a graduate of Management of Innovative Technology, Cal Tech; Executive Management, UCLA; Six Sigma Leadership & Six Sigma Specialist, Raytheon Learning Institute; and Business Leadership Program, University of Chicago. He received his BS, MS & PhD degrees from Syracuse University in Physics.
Technical and Non-technical Presenters
Optoelectronics Research Group of John Bowers
Dan Blumenthal, Optical Communication and Photonic Integration Group
Phil Lubin, UCSB Experimental Cosmology Group
Unite To Light
Center for Science and Engineering Partnerships (CSEP) at CNSi
UCSB Nanofabrication Facility
Add it to your calendar by opening this file:
The event will include a career fair, in which attendees will have one-on-one time with representatives of local companies.
There will be two Tracks for the lectures: Technical and Non-Technical.
The Technical Track will feature lectures on cutting-edge research in the area from varying fields that use and manipulate light.
The Non-Technical Track will focus on careers in the industry and professional development.
See here for more details
Department of Electrical and Computer Engineering, University of Toronto
When: Monday, March 13, 12:00PM
Where: ESB 1001
[Seminar] Democratization of Next‐Generation Microscopy, Sensing and Diagnostics Tools through Computational Photonics
University of California, Los Angeles Electrical Engineering Department
California NanoSystems Institute Bioengineering Department
When: Wednesday, April 5 (Time TBA)