WOMBAT

Public lecture by Kerry Vahala

In addition to his keynote talk in the technical session, Prof. Kerry Vahala will be giving a public lecture on the first day of WOMBAT - hosted by the Sydney Uni OSA/SPIE student chapter.

Everyone is welcome!

Date
Monday, 20 July
5.15pm - 6.15pm

Integrated optical clocks to phonon lasers: optical micro-resonator technology & science

Kerry Vahala

Abstract

Like a tuning fork for light, optical resonators have a characteristic set of frequencies at which it is possible to confine light waves. At these frequencies, optical energy can be efficiently stored for lengths of time characterized by the resonator Q factor, roughly the storage time in cycles of oscillation. In the last ten years there has been remarkable progress in boosting this storage time in micro and millimeter-scale optical resonators. Chip-based devices have attained Q factors of nearly 1 billion and micro-machined crystalline devices have provided Qs exceeding 100 billion. The resulting long, energy-storage times combined with small form factors have made it possible to access a wide range of nonlinear phenomena and to create laser devices that operate with remarkably low turn-on powers. Also, new science has resulted from radiation-pressure coupling of optical and mechanical degrees-of-freedom in the resonators themselves. I will review some of these results including the effort to miniaturize time standards and stable frequency sources using frequency micro combs as well as the physics of cavity-optomechanics including phonon lasers and mechanical ground-state cooling.

 


Venue

Address
Slade Lecture Theatre
School of Physics, The University of Syndey
Physics Road, Camperdown Campus, NSW 2006