ECE Seminar: Tailoring Light-Matter Interaction at Nano-Scale for Mid-Infrared Optoelectronics
Wednesday, March 5, 2014
11:30 am - 12:30 pm
Gross Hall 330
Yu Yao, Postdoctoral Fellow, School of Engineering and Applied Science at Harvard University
The mid-infrared wavelength range (3-15 um) is of particular importance for applications in spectroscopy, biomedical sensing, communication, safety and industry, since it hosts strong vibrational fingerprints of many molecules and broad atmospheric transmission windows. Yet, the development of high-performance, compact optoelectronic devices for mid-infrared spectral region remains a great challenge, mainly due to the material limitations. The rapid development in nanostructures and nanomaterials has brought great opportunities to control light-matter interaction at the subwavelength scale and generate exotic properties which do not exist in nature. Translating these technologies to novel optic and optoelectronic devices, esp. in the mid-infrared region, holds great promise to solve the big challenges posted by the fundamental constraints in natural materials. In this talk, I will present novel device designs based on nanostructures and graphene for high performance, ultra-compact mid-infrared optoelectronic devices. I will show that the band engineering of semiconductor hetero-structures enables great flexibility in tailoring the laser emission spectra over the whole mid-infrared spectral range. Dr. Yu Yao is a postdoctoral fellow in the School of Engineering and Applied Science at Harvard University. She received the Ph.D. degree in Electrical Engineering from Princeton University in 2011.