Photothermal optomechanics in superfluid helium coupled to a fiber-based cavity

Abstract

Presented in this paper are measurements of an optomechanical device in which various acoustic modes of a sample of superfluid helium couple to a fiber-based optical cavity. In contrast with recent work on the paraxial acoustic mode confined by the cavity mirrors, we focus specifically on the acoustic modes associated with the helium surrounding the cavity. This paper provides a framework for understanding how the acoustic modes depend on device geometry. The acoustic modes are observed using the technique of optomechanically induced transparency/amplification. The optomechanical coupling to these modes is found to be predominantly photothermal.

13 pages, 8 figures

References in corpus (4)

• Optomechanically induced transparency
• Fiber Fabry-Perot cavity with high finesse
• Photothermal effects in ultra-precisely stabilized tunable microcavities
• Nonlinear optical effects of ultrahigh-Q silicon photonic nanocavities immersed in superfluid helium

Cited by in corpus (9)

• Achievements and Perspectives of Optical Fiber Fabry-Perot Cavities
• Cavity Optomechanics in a Levitated Helium Drop
• Direct laser-written optomechanical membranes in fiber Fabry-Perot cavities
• Bidirectional microwave-optical transduction based on integration of high-overtone bulk acoustic resonators and photonic circuits
• Dueling Dynamical Backaction in a Cryogenic Optomechanical Cavity
• A tunable fiber Fabry-Perot cavity for hybrid optomechanics stabilized at 4 K
• Proposal for a quantum traveling Brillouin resonator
• Electromechanical feedback control of nanoscale superflow
• A cryogenic chamber setup for superfluid helium experiments with optical fiber and electrical access