Enhanced optomechanical readout using optical coalescence

Claudiu Genes*, André Xuereb, Guido Pupillo, Aurélien Dantan

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

16 Citations (Scopus)


We present a scheme to strongly enhance the readout sensitivity of the squared displacement of a mobile scatterer placed in a Fabry-Pérot cavity. We investigate the largely unexplored regime of cavity electrodynamics in which a highly reflective element positioned between the end mirrors of a symmetric Fabry-Pérot resonator strongly modifies the cavity response function, such that two longitudinal modes with different spatial parity are brought close to frequency degeneracy and interfere in the cavity output field. In the case of a movable middle reflector we show that the interference in this generic "optical coalescence" phenomenon gives rise to an enhanced frequency shift of the peaks of the cavity transmission that can be exploited in optomechanics.

Original languageEnglish
Article number033855
JournalPhysical Review A (Atomic, Molecular, and Optical Physics)
Issue number3
Publication statusPublished - 30 Sept 2013

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics


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