Hybrid system of different shapes of gold nanoparticles on microcavity to study Purcell's effect
Hybrid system of different shapes of gold nanoparticles on microcavity to study Purcell's effect
Whispering gallery modes (WGMs) occur due to total internal reflection in symmetric dielectric structures. These modes have high quality (Q) factor and low mode volume (Veff). Photoluminescence (PL) of an emitter when coupled with WGMs leads to the modification in the radiative rate of the emitter. This effect on the radiative rate is known as Purcell effect. Purcell factor (FP) is proportional to Q/Veff of the cavity. Localized surface plasmon resonance (LSPR) of metal nanoparticles (NPs) can be used along with the WGMs of the microcavity to have a combined LSPR-WGM hybrid system. LSPR depends on the shape and size of the NPs which can affect FP of the microcavity. In this work, we report the effect of octopod and octahedral shaped gold nanoparticles (AuNPs) on the radiative rate of rhodamine B (RB) doped microspheres. FP values of smaller than unity have been observed indicating the inhibition of the radiative rate in the microcavity.
Plasmonics, Purcell effect, Radiative rate, Whispering gallery modes
Agrawal, Tulika
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Bhattacharya, Shubhayan
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Veluthandath, Aneesh Vincent
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Murugan, Ganapathy Senthil
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Singh, Gurvinder
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Zreiqat, Hala
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Bisht, Prem B.
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1 April 2020
Agrawal, Tulika
6e00d242-f6b8-4547-8a14-71ac664e7708
Bhattacharya, Shubhayan
64fa4af8-6833-4075-b4ad-f86b787a656f
Veluthandath, Aneesh Vincent
6a183413-e10f-4374-bc64-a33bf7fd9cfa
Murugan, Ganapathy Senthil
a867686e-0535-46cc-ad85-c2342086b25b
Singh, Gurvinder
75d7551d-671c-4c4e-b886-fe8593cd534d
Zreiqat, Hala
be7ca582-7c9b-4778-8dea-d39a5f0705e2
Bisht, Prem B.
9e617371-071b-48b1-9f33-2801ea08cace
Agrawal, Tulika, Bhattacharya, Shubhayan, Veluthandath, Aneesh Vincent, Murugan, Ganapathy Senthil, Singh, Gurvinder, Zreiqat, Hala and Bisht, Prem B.
(2020)
Hybrid system of different shapes of gold nanoparticles on microcavity to study Purcell's effect.
Lecler, Sylvain, Astratov, Vasily N. and Minin, Igor V.
(eds.)
In Photonics and Plasmonics at the Mesoscale.
vol. 11368,
SPIE.
8 pp
.
(doi:10.1117/12.2555349).
Record type:
Conference or Workshop Item
(Paper)
Abstract
Whispering gallery modes (WGMs) occur due to total internal reflection in symmetric dielectric structures. These modes have high quality (Q) factor and low mode volume (Veff). Photoluminescence (PL) of an emitter when coupled with WGMs leads to the modification in the radiative rate of the emitter. This effect on the radiative rate is known as Purcell effect. Purcell factor (FP) is proportional to Q/Veff of the cavity. Localized surface plasmon resonance (LSPR) of metal nanoparticles (NPs) can be used along with the WGMs of the microcavity to have a combined LSPR-WGM hybrid system. LSPR depends on the shape and size of the NPs which can affect FP of the microcavity. In this work, we report the effect of octopod and octahedral shaped gold nanoparticles (AuNPs) on the radiative rate of rhodamine B (RB) doped microspheres. FP values of smaller than unity have been observed indicating the inhibition of the radiative rate in the microcavity.
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More information
Published date: 1 April 2020
Venue - Dates:
Photonics and Plasmonics at the Mesoscale 2020, , None, France, 2020-04-06 - 2020-04-10
Keywords:
Plasmonics, Purcell effect, Radiative rate, Whispering gallery modes
Identifiers
Local EPrints ID: 444646
URI: http://eprints.soton.ac.uk/id/eprint/444646
ISSN: 0277-786X
PURE UUID: 35846103-b45f-4289-b854-defc79327759
Catalogue record
Date deposited: 28 Oct 2020 18:03
Last modified: 17 Mar 2024 04:00
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Contributors
Author:
Tulika Agrawal
Author:
Shubhayan Bhattacharya
Author:
Gurvinder Singh
Author:
Hala Zreiqat
Author:
Prem B. Bisht
Editor:
Sylvain Lecler
Editor:
Vasily N. Astratov
Editor:
Igor V. Minin
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