Photonics Research, Volume. 10, Issue 3, 747(2022)
Topological edge states at singular points in non-Hermitian plasmonic systems
Fig. 1. Schematic of the compound unit cell of a periodic structure consisting of an MDM waveguide side-coupled to three identical MDM stub resonators.
Fig. 2. (a) Dispersion relation of the periodic structure without modulation calculated using FDFD method (black dots). Results are shown for
Fig. 3. (a) Projected dispersion relation of the periodic structure with the compound unit cell of Fig.
Fig. 4. (a) Reflection spectra when the waveguide mode is incident from the right onto the single-unit-cell structure calculated using the FDFD method (blue solid line). Also shown are the reflection spectra when the waveguide mode is incident from the left (black solid line) and right (red solid line) onto the three-unit-cell structure calculated using the FDFD method. In addition, shown are the calculated reflection spectra using CMT, when the waveguide mode is incident from the right onto the three-unit-cell structure (green circles). Here, the material loss in silver is included. The dielectric constant of the material filling the stubs (InGaAsP with InAs quantum dots) is equal to
Fig. 5. (a), (c) Reflection spectra when the waveguide mode is incident from the right and left, respectively, onto the three-unit-cell structure calculated using the FDFD method. The material loss in silver is included. The dielectric constant of the material filling the stubs (InGaAsP with InAs quantum dots) is equal to
Fig. 6. (a) Schematic of the compound unit cell of a structure consisting of a finite number of unit cells. The unit cell consists of an MDM waveguide side-coupled to three MDM stub resonators which have the same resonance frequency
Fig. 7. (a), (b) Profile of the magnetic field amplitude in the middle of the MDM waveguide, normalized with respect to the field amplitude of the incident waveguide mode in the middle of the waveguide, when the mode is incident from the left and right, respectively, onto the three-unit-cell structure of Fig.
Fig. 8. FOM [Eq. (
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Yin Huang, Yuecheng Shen, Georgios Veronis, "Topological edge states at singular points in non-Hermitian plasmonic systems," Photonics Res. 10, 747 (2022)
Category: Nanophotonics and Photonic Crystals
Received: Sep. 22, 2021
Accepted: Jan. 16, 2022
Published Online: Feb. 22, 2022
The Author Email: Yin Huang (yhuan15@csu.edu.cn), Yuecheng Shen (shenyuecheng@mail.sysu.edu.cn)