Sensing nanoparticles with a cantilever-based scannable optical cavity of low finesse and sub- λ3 volume

Kelkar H, Wang D, Martin-Cano D, Hoffmann B, Christiansen S, Götzinger S, Sandoghdar V (2015)


Publication Language: English

Publication Status: Published

Publication Type: Journal article, Original article

Publication year: 2015

Journal

Publisher: American Physical Society

Book Volume: 4

Article Number: 054010

Journal Issue: 5

DOI: 10.1103/PhysRevApplied.4.054010

Abstract

We report on the realization of an open plane-concave Fabry-Perot resonator with a mode volume below λ3 at optical frequencies. We discuss some of the less-common features of this microcavity regime and show that the ultrasmall mode volume allows us to detect cavity resonance shifts induced by single nanoparticles even at quality factors as low as 100. Being based on low-reflectivity micromirrors fabricated on a silicon cantilever, our experimental arrangement provides broadband operation, tunability of the cavity resonance, and lateral scanning. These features are interesting for a range of applications including biochemical sensing, modification of photophysics, and optomechanical studies.

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How to cite

APA:

Kelkar, H., Wang, D., Martin-Cano, D., Hoffmann, B., Christiansen, S., Götzinger, S., & Sandoghdar, V. (2015). Sensing nanoparticles with a cantilever-based scannable optical cavity of low finesse and sub- λ3 volume. Physical Review Applied, 4(5). https://dx.doi.org/10.1103/PhysRevApplied.4.054010

MLA:

Kelkar, Hrishikesh, et al. "Sensing nanoparticles with a cantilever-based scannable optical cavity of low finesse and sub- λ3 volume." Physical Review Applied 4.5 (2015).

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