The International Society for Optics and Photonics
CREOL, The College of Optics & Photonics
The mission of SPIE Student Chapter is to advance an interdisciplinary approach to the science and application of light and provide professional development opportunities for UCF students.

SPIE Faculty Talk: "Thresholdless nanoscale lasers and the promises of metallic nano-cavities" by Dr. Mercedeh Khajavikhan


Mercedeh Khajavikhan 


The applications of nano-lasers range from on-chip optical communication to high-resolution and high-throughput imaging, sensing and spectroscopy. This has fueled interest in developing the ‘ultimate’ nano-laser: a scalable, low-threshold source of radiation that operates at room temperature and occupies a small volume on a chip. However, progress towards realizing this ultimate nano-laser has been hindered by the lack of a systematic approach to scaling down the size of the laser cavity without significantly increasing the threshold power required for lasing. 

In this talk, I present our experimental findings about lasing in nanoscale, sub-wavelength in all three dimensions, coaxial cavities that potentially solve the resonator scalability challenge by the choice of geometry and metal composition. In particular, I discuss the design, fabrication, characterization, and analysis that resulted in the smallest, room-temperature, continuous wave, telecommunication wavelength laser to date. Furthermore, by utilizing the unique properties of the coaxial cavities, which may have a single non-degenerate mode, I demonstrate thresholdless lasing at cryogenic temperatures, thus providing a scalable solution to overcoming the metal losses. 


Mercedeh Khajavikhan received B.S. in Electronics from Amirkabir University of Technology, Tehran, Iran, in 2000 and Ph.D. in Electrical Engineering from the University of Minnesota in 2009. Her Ph.D. dissertation was on coherent beam combining for high power laser applications. In 2009, she joined the University of California in San Diego as a postdoctoral researcher where she worked on the design and development of nanolasers, plasmonic devices, and silicon photonics components. In August 2012, she joined the College of Optics and Photonics (CREOL) at the University of Central Florida as an assistant professor. She received the NSF CAREER Award in 2015.

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Alex Sincore

Posted Friday, March 4, 2016

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