Photonics Research, Volume. 9, Issue 12, 2398(2021)
Hybrid photonic-plasmonic cavities based on the nanoparticle-on-a-mirror configuration
Fig. 1. Conceptual scheme of the hybrid system under study. (a) A metallic nanoparticle is placed on top of a dielectric cavity. Both structures are spaced by a tiny gap of thickness
Fig. 2. Simulation results of the different building blocks of the hybrid cavity. (a) Normalized LDOS,
Fig. 3. Simulation results of the hybrid cavity as a function of the gold nanosphere radius. (a) Normalized LDOS and (b) quality factor and normalized mode volume for the hybrid system constituted by the cavity beam and a gold nanoparticle of radius varying from
Fig. 4. Simulation results of alternative configurations for the hybrid cavity. (a) Normalized LDOS, quality factor, and normalized mode volume and (b) mode profile (
Fig. 5. Mode profiles of the electric field amplitude
Fig. 6. Comparison of the LDOS as a function of the wavelength for the three hybrid systems considered. The green line shows the results of the full-wave simulations (labeled FWS) discussed above. The blue curve shows the LDOS as calculated with Eq. (
Fig. 7. Quality factors
Fig. 8. Scheme of the proposed photonic crystal cavity. In (a) and (b), 3D and 2D (
Fig. 9. Scheme of the hybrid cavity: gold NP—in this case, a nanosphere—on a photonic crystal cavity. (a) and (b) A 3D view and a 2D cut (
Fig. 10.
Fig. 11. Detail of the
Fig. 12. Scheme of the geometry used in COMSOL to calculate the radiative power. (a)
Fig. 13. Scheme of the model used to perform the simulations corresponding to the absorption, scattering, and extinction cross sections of bare gold NPs. In (a), the PML and the air medium surrounding the NP can be observed. In (b), we have represented a 2D cut of the 3D view in (a), where the NP is also visible.
Fig. 14. (a) Radiative LDOS for different radii of the sphere surrounding the dipole (
Fig. 15. Absorption and scattering cross sections’ spectra for a nanosphere of radius
Fig. 16. (a) Photonic band diagram of the mirror unit cell for the TM modes with even and odd
Fig. 17. (a) Normalized LDOS and (b)
Fig. 18. Radiative and nonradiative contributions to the normalized LDOS for the (a) nanosphere-based (
Fig. 19. Radiative contribution to the (a) normalized LDOS and (b) ratio of radiative/nonradiative LDOS for different radii of the nanosphere-based hybrid cavity (
Fig. 20. Normalized LDOS,
Fig. 21. Radiative contribution to the normalized LDOS for the (a) nanosphere (
Fig. 22. Absorption, scattering, and extinction cross sections (CS) for the (a) nanosphere (
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Angela I. Barreda, Mario Zapata-Herrera, Isabelle M. Palstra, Laura Mercadé, Javier Aizpurua, A. Femius Koenderink, Alejandro Martínez. Hybrid photonic-plasmonic cavities based on the nanoparticle-on-a-mirror configuration[J]. Photonics Research, 2021, 9(12): 2398
Category: Nanophotonics and Photonic Crystals
Received: Jun. 9, 2021
Accepted: Sep. 16, 2021
Published Online: Oct. 27, 2021
The Author Email: Alejandro Martínez (amartinez@ntc.upv.es)