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Investigation of sub-diffraction mode characteristics in a semiconductor plasmonic nanolaser at telecom wavelength
Published in Khaled Habib, Elfed Lewis, Frontier Research and Innovation in Optoelectronics Technology and Industry, 2018
Here we compare the plasmonic nanolaser performance for oxides of different refractive index, with MgF2 and Al2O3 being the low and high refractive index oxides, respectively, to determine the material most suitable for the nanolaser structure. First, the mode characteristics of the nanolasers with the two different oxides are calculated and compared. Theoretically (Maier, 2007), only the Transverse Magnetic (TM) mode can propagate on the surface of a pure plasmonic waveguide (metal-insulator). On the other hand, the semiconductor waveguide supports the propagation of Transverse Electric (TE) modes with the electric field parallel to the quantum-well axis. But in the hybrid plasmonic waveguide, a hybrid or quasi-TM mode (EH) can also propagate (Figure 2). Therefore, to investigate the modal behaviors of the structure, we choose three different modes, the first fundamental plasmonic mode (SPP0), the first hybrid mode (EH00) and the fundamental photonic mode.
Gain-Assisted Surface PIasmon Resonances and Propagation
Published in Hongxing Xu, Nanophotonics, 2017
To maintain the deep subwavelength confinement offered by the short-range SPPs and be able to further decrease the propagation loss in the SPP mode, Oulton et al. proposed theoretically a hybrid plasmonic mode, which exists at the metalinsulatorsemiconductor interfaces [34]. This hybrid plasmonic waveguide was then demonstrated by Oulton et al. later in 2009, showing mode areas as small as λ2/400[13] $ \lambda^{2} /400[13] $ . In this paper the authors also demonstrated the full compensation of propagation loss of this hybrid mode by the realization of SPASER at 489 nm at a low temperature of < 10K.
Investigation of a V-shaped ITO-plasmonic material based electro-absorption modulator for PIC and high-speed optical communication systems
Published in Journal of Modern Optics, 2021
Himanshu R. Das, Subhash C. Arya
In this paper, a V-shaped ITO-plasmonic based EAM with different waveguide heights are designed, and its performances are investigated and compared in terms of ER, IL, and FOM, respectively, along with the contemporary ITO-based optical modulators. Also, the structural parameters of the device are optimized in terms of waveguide width, height, and thickness of the plasmonic material used, respectively. The investigated V-shaped ITO-plasmonic based EAMs consist of a Si-ITO-HfO2-Si stack upon a silica substrate. The light propagating inside the waveguide achieves stronger field confinement in the presence of a plasmonic material and the dielectric material when an electric field is introduced, making it a hybrid plasmonic waveguide as shown in Figure 1(a). The effective refractive index of the medium changes upon applied potential as most of the light is confined tightly at the active layer interface, resulting in higher FOM. The higher value of FOM is related to the lower value of IL and ER's higher value. A FEM solver in Comsol Multiphysics is used to carry out the simulation work [25].
Dual-polarization operating hybrid plasmonic 2×2 multimode interferometer with mode converter for SOI platform
Published in Journal of Modern Optics, 2020
J. Wang, J. J. Wang, X. Xu, N. N. Ning, Q. F. Liu, Y.Q. Lu
To reduce the footprint of the optical device and further improve the integration level of PICs, a hybrid plasmonic waveguide (HPW) has been proposed, whose light confinement ability is not limited by diffraction and leads to much smaller device sizes [9,10]. Recently, the plasmonic polarizer [11,12], the polarization rotator [13], the polarization beam-splitter [14] and the optical hybrid [15] have been proposed. Especially, with the same waveguide width, a multimode HPW can support more guided modes than a dielectric multimode waveguide [16]. Moreover, HPW is compatible with silicon photonic technology and can be integrated on the SOI platform. However, because the plasmonic modes of HPW are mostly concentrated near the interface between the metal and dielectric layers, the dual-polarization operation condition of HPW-MMI would be much strict and harsh. Also, because the HPW modes still undergo the Ohmic loss in the metal, the little high propagation loss limits the utilization of the HPW devices in a large chip scale.