Titre :

Exceptional point enhances sensitivity of optomechanical mass sensors

Auteur(s) :

Djorwe, P. [Auteur correspondant]
Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]
Pennec (Admin), Yan [Auteur]
Physique - IEMN [PHYSIQUE - IEMN]
Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]
Djafari-Rouhani, Bahram [Auteur]
Physique - IEMN [PHYSIQUE - IEMN]
Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]

Titre de la revue :

Physical Review Applied

Pagination :

024002

Éditeur :

American Physical Society

Date de publication :

2019-08-01

ISSN :

2331-7019

Discipline(s) HAL :

Sciences de l'ingénieur [physics]
Physique [physics]/Physique [physics]/Optique [physics.optics]

Résumé en anglais : [en]

We propose an efficient optomechanical mass sensor operating at exceptional points (EPs), non-Hermitian degeneracies where eigenvalues of a system and their corresponding eigenvectors simultaneously coalesce. The benchmark ...
Lire la suite >We propose an efficient optomechanical mass sensor operating at exceptional points (EPs), non-Hermitian degeneracies where eigenvalues of a system and their corresponding eigenvectors simultaneously coalesce. The benchmark system consists of two optomechanical cavities that are mechanically coupled, where we engineer mechanical gain (loss) by driving the cavity with a blue-detuned (red-detuned) laser. The system features an EP at the gain and loss balance, where any perturbation induces a frequency splitting that scales as the square root of the perturbation strength, resulting in a giant sensitivity-factor enhancement compared with conventional optomechanical sensors. For nonidentical mechanical resonators, quadratic optomechanical coupling is used to tune the frequency mismatch to get closer to the EP, extending the efficiency of our sensing scheme to mismatched resonators. This work paves the way toward new levels of sensitivity for optomechanical sensors, which could find applications in many other fields, including nanoparticle detection, precision measurement, and quantum metrology.Lire moins >

Langue :

Anglais

Vulgarisation :

Non

Projet Européen :

All-Phononic circuits Enabled by Opto-mechanics

Collections :

• Institut d'Électronique, de Microélectronique et de Nanotechnologie (IEMN) - UMR 8520

Source :

Harvested from HAL