Controlled Multichannel Surface Plasmon Polaritons Transmission on Atomic Smooth Silver Triangular Waveguide

Abstract

applications of photonic integrated plasmonic devices are considered as one of the most promising solutions. [2] Surface plasmon polaritons (SPPs) based waveguides have attracted much of the attention because of the stronger confinement of the electromagnetic fields compared with the dielectric based devices. [3] SPPs are polaritons coupling light and collective coherent oscillations of free electrons which propagate on the interface between metal and dielectric. [4] SPPs not only confine the energy in localized region [5] but also exhibit many optical properties like interference [6] and diffraction. [7] The intrinsic features of exciting photons such as the spin [8] and entanglement [9] can be effectively maintained by SPPs. The SPP waveguides are considered as an optimal candidate for optical information transport. [10] The SPPs waveguides like nanowires, [11] parallel strips, [12] nanogrooves, [13] and nanowedges [14] have been demonstrated to guide different plasmon modes [15] for potential photonic devices applications. [16] Up to now, two kinds of SPPs waveguides have been widely used. One is the chemically synthesized singlecrystalline nanowire which is suited for long-range signal transmission. [17] The other one is lithography-based waveguide arrays which are uniformly distributed, well-patterned, and suitable for integration purposes with wide-range signal manipulation. [18] Although the atomic smooth surface in the chemically synthesized nanowire leads to a low energy loss, it is still difficult to control the morphology unification and the position of the synthesized waveguides compared with the lithography-based waveguide arrays. [19] For lithographybased waveguide arrays, the significant energy dissipation during the SPPs propagation resulting from relative high surface roughness limits its application in long-range transmission. [20] These challenges of two kinds of waveguides highly limit the performance of the wide-range integrated waveguide device applications. Therefore, SPPs waveguide with ultrasmooth surface and tunable multipropagation channel is urgently needed for developing plasmonic devices. The chemically synthesized monocrystalline Ag/Au plates have shown The application of plasmonic devices is considered as one promising solution for overcoming the limitation of traditional electronic devices. The critical challenges of plasmonic transmission devices include the control accuracy of large-scale signal transmission and energy loss reduction. The 2D plasmonic waveguide provides a good platform on surface plasmon polaritons (SPPs) multimode excitation and emission manipulation. Here, an atomic smooth triangular waveguide with controllable multichannel transmission and relative long 1/e decay length is demonstrated. Corresponding SPPs excitation and propagation process are investigated through far-field and near-field distributions both experimentally and numerically. It is found that two different SPPs propagation modes can be selectively excited and supported on the surface of the...

Plasmon enhanced light–matter interaction of rice-like nanorods by a cube-plate nanocavity

“…[5][6][7] In addition, the wavelength of the surface plasmon resonance (SPR) can be easily tuned from ultraviolet to the infrared range by altering the geometric parameter of the nanostructure, which can be used to further enhance the light-matter interaction. [8][9][10][11] Up to now, the plasmonic nanocavity systems have been widely used for the applications of surface-enhanced Raman spectroscopy (SERS) 12-13, surface-enhanced fluorescence (SEF) 14-15, optical nonlinearity enhancement [16][17] and intrinsic mechanism exploration of the light-matter interaction at the nanoscale [18][19][20][21] .…”

“…[8][9][10][11] Up to now, plasmonic nanocavity systems have been widely used for the applications of surface-enhanced Raman spectroscopy (SERS), 12,13 surface-enhanced uorescence (SEF), 14,15 optical nonlinearity enhancement 16,17 and intrinsic mechanism exploration of the light-matter interaction at the nanoscale. [18][19][20][21] Quantum emitters, such as molecules, quantum dots (QDs), and semiconductor quantum wells, usually have a weak coupling efficiency with light in free space due to the mismatch of the length scale. 22 The strong light connement in the nanogap region of the plasmonic nanocavity systems provides a convenient platform for solving the length scale mismatch, which results in a series of optical signal changes depending on the interaction strength between the quantum emitter and the plasmonic nanocavity.…”

Modulation of the Transmission Spectra of the Double‐Ring Structure by Surface Plasmonic Polaritons

“…The combination of surface plasmonic polaritons and double-slit interference is an exciting research topic [6][7][8][9][10][11][12][13][14][15][16][17][18][19][20]. The outcomes have potential applications in quantum physics, fundamental optics, optical imaging, detection, integrated circuit design, and other fields [21][22][23][24][25][26][27][28].…”

Plasmonic nanocavity enhanced vibration of graphene by a radially polarized optical field

“…For example, for monolayer graphene, the absorption efficiency is only 2.3% [20]. Nobel metal nanostructures can confine the light to the surface of metal, which provides a strong enhancement of the electromagnetic (EM) field, thereby strengthening the weak absorption of 2D materials as well as the light-matter interaction [21][22][23][24][25]. Moreover, the EM field generated by plasmonic nanostructures can be designed not only by varying the size and shape of the structure but also by changing the incident optical field and polarization state [26].…”