Phononic Frequency Combs – A New Addition to Photonics and MEMS

Seminar | October 14 | 2-3 p.m. | 3110 Etcheverry Hall

 Adarsh Ganesan, Ph.D., Postdoctoral Researcher; US National Institute of Standards and Technology

 Department of Mechanical Engineering (ME)

Abstract: Phononic frequency combs (PFC) are the mechanical analogs of celebrated photonic frequency combs. These represent a newly documented physical phenomenon in the well researched physical domain of MEMS resonators [1].

The emergence of PFC is mediated by nonlinear modal coupling. Through a series of experiments with MEMS resonators, various features of PFC have now been identified. These include drive parameters for comb operation, hysteresis for comb spectrum tailoring and growth, saturation and attenuation mechanisms of combs, and nonlinear sensitivity to physical perturbations.

My talk will describe the physics of phononic frequency combs and the broad implications to the fields of photonics and MEMS in addressing the application spaces of sensing, communications and quantum information science.

[1] Ganesan, A., Do, C. and Seshia, A., 2017. Phononic frequency comb via intrinsic three-wave mixing. Physical review letters, 118(3), p.033903.

Biography: Adarsh Ganesan is currently a postdoctoral researcher at the US National Institute of Standards and Technology. He holds his PhD in Engineering from Cambridge University and BE (Hons) in Electrical and Electronics Engineering from Birla Institute of Technology and Scienc, Pilani.

Adarsh has been recognized for his doctoral work on phononic frequency combs by the 2017 John Winbolt prize (Cambridge University), the 2017 ABTA UK doctoral researcher award (Rank 1 in Engineering Sciences), the 2018 APS GSNP Student Speaker Award (Finalist), the 2018 IET Hudswell International Research Scholarship and the 2019 BITSAA Global 30 Under 30 Award.

 lwlin@berkeley.edu, 510-643-5495