Join us for our Summer BBQ!

Where: ESB 1001
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.

Date: Wednesday, May 10, 2017 
Location: UCSB, Engineering Science Building, Rooms ESB1001, ESB 2001, ESB 2003
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Join us for our spring event the 2017 Light Science Workshop for a day of talks and presentations about the cutting edge in photonics research and career opportunities in this blossoming industry. The event will feature a keynote speaker, technical and non-technical presentations, Q&A panels, a job fair and a poster session!

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.

​If you are interested in sponsoring the event or holding a booth at the career fair, please contact us

Please see our Program of Events for more information!

Technical and Non-technical talks will include presentations from speakers representing research groups, photonics companies, and partnerships and collaborations at UCSB and around Santa Barbara. A sample of our scheduled speakers will include the following:
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Optoelectronics Research Group of John Bowers
Dan Blumenthal, Optical Communication and Photonic Integration Group
Phil Lubin, UCSB Experimental Cosmology Group
AIM Photonics
​Freedom Photonics
Unite To Light
Center for Science and Engineering Partnerships (CSEP) at CNSi
UCSB Nanofabrication Facility

This event is made possible with the generous support of:
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Biography: ​J. Stewart Aitchison received a BSc and a PhD from the Department of Physics, Heriot‐Watt  University, Edinburgh, in 1984 and 1987 respecvely. His PhD dissertation research was on optical bi‐stability in semiconductor waveguides. From 1988 to 1990 he was a Postdoctoral Member of Technical Staff at Bellcore, Red Bank NJ. His research interests there were in high nonlinearity glasses and spatial optical solitons. He joined the University of Glasgow Department of Electronics and Electrical Engineering in 1990 and was promoted to a Personal Chair as Professor of Photonics in 1999. His research in Glasgow focused on the use of the half band gap nonlinearity of semiconductors for the realization of all‐optical switching devices and the study of spatial soliton effects. He also worked on the development of quasi phase matching techniques in semiconductors, monolithic integration, optical rectification, and planar silica technology. His research group developed novel optical biosensors, waveguide lasers and photosensitive direct writing processes based around the use of Flame Hydrolysis Deposited (FHD) silica. In 1996 he held a Royal Society of Edinburgh Personal Fellowship and carried out research on spatial solitons as a visiting researcher at the CREOL, University of Central Florida. Since 2001, Professor Aitchison has held the Nortel Chair in Emerging Technology in the Department of Electrical and Computer Engineering at the University of Toronto. His current research covers all‐optical switching and signal processing, optoelectronic integration and optical bio‐sensors. From 2004‐2007 he was the Director of the Emerging Communications Technology Institute at the University of Toronto, where he established a $30 million open access facility for micro and nano‐fabrication. From 2007‐2012 he served as Vice‐Dean Research for the Faculty of Applied Science and Engineering, University of Toronto. Since 2013 he has been the Associate Scientific Director for the Canada–India Network Centre of Excellence, IC‐IMPACTS where he is responsible for the mobile health research theme.