SSO Seminar - Prof. Peter Rakich, Yale University - “Harnessing photon-phonon interactions for classical and quantum applications”

Solid State & Optics Seminar 

sponsored by “The Flint Fund Series on Quantum Devices and Nanostructures”

Date : Wednesday, 11/16/22

Time: 1:00PM

Speaker: Prof. Peter Rakich, Yale University 

Location: YQI Seminar Room

Zoom Link: https://yale.zoom.us/j/92875940965?pwd=NWE2ZTV6cld2bTQ4bFhaRjVDazdldz09

Meeting ID: 928 7594 0965

Password: 617612

 

Harnessing photon-phonon interactions for classical and quantum applications

In recent years, acoustic phonons have emerged as a powerful resource for signal processing, precision metrology, and quantum information processing. In this presentation, we explore methods for controlling and shaping the interactions between photons and acoustic phonons as the basis for both classical and quantum information processing applications. We begin by describing how traveling-wave photon-phonon coupling can be engineered within silicon-based optomechanical waveguides to realize a range of new Brillouin-based optomechanical interactions. Harnessing these interactions, we create non-reciprocal light propagation, optical amplifiers, and laser oscillators as the basis for new signal processing technologies in silicon photonics.

These same traveling-wave interactions also permits laser-based cooling of phonon modes as a means of controlling and shaping noise.
Building on these concepts, we also show that intriguing new regimes of photon-phonon coupling emerge at cryogenic temperatures where intrinsic sources of phonon dissipation plummet. Using Brillouin interactions to access long-lived bulk-acoustic phonons within macroscopic crystalline resonators, we demonstrate new methods to control of ultra-long-lived phonon modes using light. These new techniques open the door to new forms of cryogenic phonon spectroscopy and high frequency (>10GHz) optomechanical systems with potential for improved robustness against thermal decoherence as the basis for future quantum phononic experiments.
Event time: 
Wednesday, November 16, 2022 - 1:00pm