MIR Glass Photonics, Semiconductor Nanoparticles ... and A Teeny Bit of Plasmonics
Glasses are used for numerous photonic structures including optical fibers, on-chip waveguides and microresonators. Depending on the specific geometry, many of these structures lead to important linear and nonlinear optical phenomena, and undoped glasses lend themselves quite naturally to a broad range of sensors, especially via evanescent-wave interactions, both in linear waveguides and in closed resonator structures.
The optical properties of free ions doped in glasses depend strongly on local field environments – and more critically on – the distribution of phonon energies in these glasses. As such, the luminescence properties of ions in glasses depend very strongly on phonon energies and multi-phonon relaxation, which can play a severe role for mid-infrared transitions.
I will discuss some of these effects and the use of appropriate ions in glasses for demonstration of efficient lasing in the mid-infrared. The role of using semiconductor nanoparticle "cages" embedded in these glasses for next generation laser gain media will be explored.
Last, but not the least, I will discuss the use of plasmonic nanostructures with semiconductor quantum dots for unique nonlinear optical and sensing phenomena.
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- Mills Road
- Canberra, Australian Capital Territory
- Australia 2601
- Building: Oliphant Building 60
- Room Number: RSPhys Seminar Room
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- Co-sponsored by Mohsen Rahmani
Speakers
Professor R.K. Jain
Biography:
Ravi Jain is a Professor of ECE and Physics at the University of New Mexico, and is on sabbatical this academic year (2019-2020). He is currently visiting Australia and the East Asia Pacific Region on a 6-month Fulbright Distinguished Chair Scholarship Award, with a primary research assignment at the Institute of Photonics and Advanced Sensing (IPAS) at the University of Adelaide.
Prof. Jain obtained his PhD in Electrical Engineering from the University of California, Berkeley. After spending a few years in industry, including Bell Labs, Hughes Research Labs, and Amoco Technology Company, he transitioned to academics and has been at the University of New Mexico for 25 years. His current research programs range from glass science and plasmonics to advanced optical fibers, with a primary focus on optical sensing and high power NIR and MIR fiber lasers. He is a recipient of SPIE's Edgerton Award, and is a Fellow of the Optical Society of America, IEEE, SPIE, and American Physical Society. He is currently serving as an Associate Editor for Optics Express, and the Lead Editor of an Optics Express Feature Issue on "Mid-IR, LWIR, and Terahertz Photonics.
Address:University of New Mexico, , Albuquerque, New Mexico, United States