Léon Brillouin

Laboratoire Léon Brillouin

Correlation-based Brillouin sensing

Fig. 1 Block diagram of the injection-locking experimental set-up for correlation-based Brillouin distributed measurements. Traditional Brillouin sensing in optical fibres using a pulsed pump are limited to a meter spatial resolution as a result of the pump spectral broadening. This well-known limit was considered for a long time as impossible to overcome until Hotate proposed a novel technique...

Superfluid Brillouin optomechanics

Optomechanical systems couple an electromagnetic cavity to a mechanical resonator which typically is a solid object. The range of phenomena accessible in these systems depends on the properties of the mechanical resonator and on the manner in which it couples to the cavity fields. In both respects, a mechanical resonator formed from superfluid liquid helium o ers several appealing features: low...

On Brillouin Zones

1 Mathematics Department, Pennsylvania State University, University Park, Pennsylvania, USA. E-mail: [email protected] 2 Instituto de Matemática Pura e Aplicada, Rio de Janeiro, Brazil. E-mail: [email protected] 3 Departamento de Matemática, Universidade Federal de Pernambuco, Recife, Brazil. 4 Institute for Mathematical Sciences and Mathematics Department, State University of New York, Stony ...

Brillouin scattering self-cancellation

The interaction between light and acoustic phonons is strongly modified in sub-wavelength confinement, and has led to the demonstration and control of Brillouin scattering in photonic structures such as nano-scale optical waveguides and cavities. Besides the small optical mode volume, two physical mechanisms come into play simultaneously: a volume effect caused by the strain-induced refractive ...