Nonlinear Interferometry for Quantum-Enhanced Measurements of Multiphoton Absorption

N/ACitations
Citations of this article
17Readers
Mendeley users who have this article in their library.

Abstract

Multiphoton absorption is of vital importance in many spectroscopic, microscopic, or lithographic applications. However, given that it is an inherently weak process, the detection of multiphoton absorption signals typically requires large field intensities, hindering its applicability in many practical situations. In this Letter, we show that placing a multiphoton absorbent inside an imbalanced nonlinear interferometer can enhance the precision of multiphoton cross section estimation with respect to strategies based on photon-number measurements using coherent or even squeezed light directly transmitted through the medium. In particular, the power scaling of the sensitivity with photon flux can be increased by 1 order compared with transmission measurements of the sample with coherent light, such that the measurement precision at any given intensity can be greatly enhanced. Furthermore, we show that this enhanced measurement precision is robust against experimental imperfections leading to photon losses, which usually tend to degrade the detection sensitivity. We trace the origin of this enhancement to an optimal degree of squeezing which has to be generated in a nonlinear SU(1,1) interferometer.

Cite

CITATION STYLE

APA

Panahiyan, S., Muñoz, C. S., Chekhova, M. V., & Schlawin, F. (2023). Nonlinear Interferometry for Quantum-Enhanced Measurements of Multiphoton Absorption. Physical Review Letters, 130(20). https://doi.org/10.1103/PhysRevLett.130.203604

Register to see more suggestions

Mendeley helps you to discover research relevant for your work.

Already have an account?

Save time finding and organizing research with Mendeley

Sign up for free