Quantum plasmonics of finite-size particles with coherent anti-Stokes Raman scattering

Ooi, Chong Heng Raymond and Kam, Chan Hin (2019) Quantum plasmonics of finite-size particles with coherent anti-Stokes Raman scattering. Physical Review A, 99 (5). 053849. ISSN 2469-9926, DOI https://doi.org/10.1103/PhysRevA.99.053849.

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Official URL: https://doi.org/10.1103/PhysRevA.99.053849


We have developed a semianalytical theory to study a quantum plasmonic system composed of a quantum particle and a metallic particle with finite size. The quantum particle is composed of molecules driven by three laser fields and produces a coherent anti-Stokes Raman scattering (CARS) signal which is enhanced by plasmonic resonance of the metallic particle. The enhanced CARS field and the control laser form a Λ scheme that gives highly nonlinear and spatially nonlocal effects. We obtain absorption spectra that show periodic oscillations with radius of the spherical quantum particle, the whispering gallery effect. Plasmonic resonance gives very large and narrow absorption peaks as well as vanishing absorption or Fano dip at specific values of frequency and interparticle distance. The space between the two particles provides a resonant cavity effect which explains the oscillations of absorption power spectra with interparticle distance. © 2019 American Physical Society.

Item Type: Article
Funders: Ministry of Higher Education, Malaysia Grant No. FP30-2017A
Uncontrolled Keywords: Coherent anti Stokes Raman scattering; Finite-Size particles; Interparticle distances; Periodic oscillation; Plasmonic resonances; Resonant cavity effect; Semi-analytical theory; Whispering gallery
Subjects: Q Science > Q Science (General)
Q Science > QC Physics
Divisions: Faculty of Science > Department of Physics
Depositing User: Ms. Juhaida Abd Rahim
Date Deposited: 14 Feb 2020 02:33
Last Modified: 14 Feb 2020 02:33
URI: http://eprints.um.edu.my/id/eprint/23792

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