Measuring the Mode Volume of Plasmonic Nanocavities Using Coupled Optical Emitters

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Measuring the Mode Volume of Plasmonic Nanocavities Using Coupled Optical Emitters

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Title: Measuring the Mode Volume of Plasmonic Nanocavities Using Coupled Optical Emitters
Author: Hu, Evelyn; Russell, Kasey Joe; Yeung, Yan Mui Kitty

Note: Order does not necessarily reflect citation order of authors.

Citation: Russell, Kasey Joe, Yan Mui Kitty Yeung, and Evelyn Hu. 2012. Measuring the mode volume of plasmonic nanocavities using coupled optical emitters. Physical Review B 85(24): 245445.
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Abstract: Metallic optical systems can confine light to deep subwavelength dimensions, but verifying the level of confinement at these length scales typically requires specialized techniques and equipment for probing the near field of the structure. We experimentally measured the confinement of a metal-based optical cavity by using the cavity modes themselves as a sensitive probe of the cavity characteristics. By perturbing the cavity modes with conformal dielectric layers of subnanometer thickness using atomic layer deposition, we find the exponential decay length of the modes to be less than 5% of the free-space wavelength \((\lambda)\) and the mode volume to be of order \(\lambda^3/1000\). These results provide experimental confirmation of the deep subwavelength confinement capabilities of metal-based optical cavities.
Published Version: doi:10.1103/PhysRevB.85.245445
Other Sources: http://arxiv.org/abs/1207.1112
Terms of Use: This article is made available under the terms and conditions applicable to Other Posted Material, as set forth at http://nrs.harvard.edu/urn-3:HUL.InstRepos:dash.current.terms-of-use#LAA
Citable link to this page: http://nrs.harvard.edu/urn-3:HUL.InstRepos:10482554
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