- 标题
- 摘要
- 关键词
- 实验方案
- 产品
-
Four-Way Spoof Surface Plasmon Polaritons Splitter/Combiner
摘要： Corrugated metal with period grooves supports spoof surface plasmons polariton (SSPP) wave in microwave and terahertz ranges. In this letter, a four-way SSPP splitter/combiner with oval-ring periodic structures is presented by using a single connection junction. Up to the authors’ best knowledge, a four-way SSPP splitter/combiner is never reported in the literature. In order to verify the performance of the mentioned SSPP splitter/combiner, we have manufactured and tested the presented SSPP splitter/combiner. The simulation and measurement results demonstrate that the designed conversion between a single coplanar waveguide junction and four SSPP waveguides is high efficiency. The SSPP splitter equally separates the electromagnetic wave into four paths. Hence, the proposed four-way splitter is expected to develop the SSPP active and passive components and relative integrated circuits.
关键词： spoof surface plasmon polariton (SSPP),four-way splitter/combiner,Coplanar waveguide (CPW)
更新于2025-09-23 15:23:52
-
Numerical study of nanoscale biosensor based on surface plasmon polariton propagation in Mach-Zehnder interferometer structure
摘要： In this paper, we numerically investigate a nanoscale plasmonic biosensor based on Mach-Zehnder interferometry. The operation of Mach-Zehnder interferometer (MZI) biosensor is examined based on two methods. In the first method, in which the transmission of surface plasmon polariton (SPP) modes is investigated under different refractive indices of sample medium as well as different dimensions, the best transmission rate achieved about 56.6% which is resulted by refractive index variation about 0.045 for the length 12 μm and width 80 nm of the gold layer. Also, the sensitivity, figure of merit (FOM) and quality factor (Q-factor) of MZI are examined for different geometries by utilizing the alternative method. It is realized that for the constant length, increasing the thickness of gold layer has significantly led to increased Q-factor and FOM. On the other hand, considering fixed thickness of the Au layer and three different lengths, the major outcome is that as the length of biosensor increases, the sensitivity, Q-factor as well as FOM follow an upward trend. Finally, inserting two distinct additional gold layers on top of the main gold layer, resulted in an extreme increase for the sensitivity and FOM of the plasmonic MZI biosensors with respect to the MZI biosensor without additional layer.
关键词： Plasmonic biosensor,Surface plasmon polariton (SPP),Mach-Zehnder interferometer (MZI),Finite difference time domain (FDTD)
更新于2025-09-23 15:23:52
-
A compact leaky-wave antenna using a planar spoof surface plasmon polariton structure
摘要： This article presents and validates a leaky-wave antenna by using the spoof surface plasmon polariton (SSPP) technique. By properly designing the proposed SSPP unit, the SSPP wave can be switched between the confinement and radiation modes. A large radiation efficiency can be achieved by properly designing the modulation depth, which ensures that a compact SSPP leaky-wave array can be realized by using a small number of SSPP radiation units. To verify the design, a prototype which consists of a SSPP feeding network and a 4 by 4 SSPP radiation units has been fabricated by using a low cost FR-4 substrate. A good agreement between simulated and measured results has been obtained. The proposed array antenna shows the promising capability of the SSPP technique for leaky-wave antenna applications.
关键词： dispersion curve,the spoof surface plasmon polariton (SSPP),SSPP antenna array,SSPP power divider
更新于2025-09-23 15:23:52
-
Metal-insulator-metal nano square ring resonator for gas sensing applications
摘要： In this paper, three designs of Square Ring resonator (SRR) based on metal-insulator-metal (MIM) WG are reported. The transmission spectra and electric field distribution of the sensor structure are simulated using finite element method (FEM). The effect of structural parameters on the spectral characteristics and sensing performance are investigated comprehensively. The maximum achieved sensitivity and figure of merit of the sensor reached 1320 nm/RIU and 16.7, respectively. Due to the high performance and easy fabrication, this kind of plasmonic structures can find noteworthy applications in integrated optical circuits and on-chip nano-sensors.
关键词： refractive index sensor,square ring resonator,finite element method,Surface plasmon polariton,metal insulator metal waveguide
更新于2025-09-23 15:22:29
-
Recent progress in all-fiber non-Gaussian optical beam shaping technologies
摘要： Rapid development of fiber lasers are being followed by wide ranges of applications in laser processing technologies. One of the key parameters to determine the laser-matter interaction is beam shape and there have been intense research activities on beam shaping using bulk-optics. However, fiber optic solutions would take clear advantages over bulk-optics especially for fiber laser sources in terms of the beam conversion efficiency, the throughput power, and the compact footprint. In this article, all-fiber optical beam shaping technologies are reviewed and they are categorized as the phase front modification on the fiber facet, the surface plasmonics on fiber, all-fiber Fourier transformation, and multimode interference. Their physical principles, beam shaping capability, and some of the novel applications are explained
关键词： Phase front engineering,Laser beam,Surface plasmon polariton,Beam Shaping,Multimode Interference,Fourier Transform,Fiber Optics,Single mode optical fiber
更新于2025-09-23 15:21:21
-
Exploring the transfer squeezing properties from photons to the symmetric and asymmetric SPP modes
摘要： Quantum surface plasmon polariton (SPP) is a growing research area with many unknown phenomena. In this paper, the behavior of the squeezed SPP modes on the metal slab is assessed. To begin with, a quantized form of the SPP modes propagating on the metal thin film based on the Green’s tensor method is provided. Since the squeezing properties of the SPP modes are indeed transferred from incident photons, at the next step, different aspects of this phenomenon are studied. Obtaining an important direct relation between incident photons’ properties and SPP modes, will allow for the effective factors on this phenomenon to be explored. Although the initial quantum properties will be changed or lost during the photons- surface plasmon interaction, it will be shown that some factors can improve the transfer process. Finally, the squeezing transfer from incident photons to the SPP modes and effective factors on it as a full quantum phenomenon will be investigated.
关键词： squeezed SPP modes,quantum properties transfer,Quantum surface plasmon polariton,Green’s tensor method
更新于2025-09-23 15:21:21
-
[Springer Series in Optical Sciences] Fano Resonances in Optics and Microwaves Volume 219 (Physics and Applications) || Light-Tunable Fano Resonance in Metal-Dielectric Multilayer Structures
摘要： Recent progress on Fano resonances exhibited by metal-dielectric multilayer structures is reviewed. The Fano resonance in the multilayer structures is caused by coupling between a surface plasmon polariton mode supported by a metal-dielectric interface and a waveguide mode supported by a system of three dielectric layers. Electromagnetic calculations of attenuated total reflection spectra demonstrate the feasibility of realizing the Fano resonance, and the predicted Fano resonance was indeed observed experimentally. Since the structure is simple, it is easy to add the photofunctionality to the structure. Incorporation of photofunctional dye molecules into the waveguide layer made it possible to tune the Fano resonance by light irradiation.
关键词： Fano resonance,light tuning,surface plasmon polariton,waveguide mode,metal-dielectric multilayer structures
更新于2025-09-23 15:21:21
-
Double-sided Polished Ultra-stable and Ultra-sensitive Optical Fiber Sensor
摘要： A double-sided polished photonic crystal fiber (DP-PCF) for surface plasmon resonance(SPR) sensing is designed and analyzed by using the finite element analysis software COMSOL 5.5. The suggested design shows strong sensitivity stability in the low refractive index (RI) region (1.33 ～ 1.39) and ultra-high sensitivity in the high RI region (1.39 ～ 1.43), respectively. The structural parameters of the proposed sensor are studied to analyze the stability and high sensitivity of the fiber sensor. The introduced DP-PCF sensor offers high sensitivity of 32,434 nm/RIU in the RI range of 1.39 ～ 1.43 due to its special double-sided polishing design.
关键词： Photonic crystal fiber,Sensor,Surface plasmon resonance,Surface plasmon polariton
更新于2025-09-23 15:21:01
-
Manipulation of the dephasing time by strong coupling between localized and propagating surface plasmon modes
摘要： Strong coupling between two resonance modes leads to the formation of new hybrid modes exhibiting disparate characteristics owing to the reversible exchange of information between different uncoupled modes. Here, we realize the strong coupling between the localized surface plasmon resonance and surface plasmon polariton Bloch wave using multilayer nanostructures. An anticrossing behavior with a splitting energy of 144 meV can be observed from the far-field spectra. More importantly, we investigate the near-field properties in both the frequency and time domains using photoemission electron microscopy. In the frequency domain, the near-field spectra visually demonstrate normal-mode splitting and display the extent of coupling. Importantly, the variation of the dephasing time of the hybrid modes against the detuning is observed directly in the time domain. These findings signify the evolution of the dissipation and the exchange of information in plasmonic strong coupling systems and pave the way to manipulate the dephasing time of plasmon modes, which can benefit many applications of plasmonics.
关键词： Surface plasmon polariton Bloch wave,Strong coupling,Dephasing time,Photoemission electron microscopy,Localized surface plasmon resonance
更新于2025-09-23 15:21:01
-
Straight Long-Range Surface Plasmon Polariton Waveguide Sensor Operating at ??0 = 850 nm
摘要： A bulk refractive index sensor based on a straight long-range surface plasmon polariton (LRSPP) waveguide is theoretically designed. The waveguide sensor consists of an Au stripe that is embedded in ultraviolet sensitive polymer SU-8. The geometric parameters are optimized by finite difference eigenmode method at the optical wavelength of 850 nm. The sensitivity of 196 dB/RIU/mm can be obtained with a 1.5 μm wide, 25 nm thick Au stripe waveguide. Straight LRSPP waveguides are fabricated by a double layer lift-off process. Its optical transmission is characterized to experimentally prove the feasibility of the proposed design. This sensor has potential for the realization of a portable, low-cost refractometer.
关键词： refractive index sensor,waveguide,surface plasmon polariton,polymer
更新于2025-09-23 15:21:01