- 标题
- 摘要
- 关键词
- 实验方案
- 产品
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HIGH GAIN SLOTTED WAVEGUIDE ANTENNA BASED ON BEAM FOCUSING USING ELECTRICALLY SPLIT RING RESONATOR METASURFACE EMPLOYING NEGATIVE REFRACTIVE INDEX MEDIUM
摘要： In this paper, a new high performance slotted waveguide antenna incorporated with negative refractive index metamaterial structure is proposed, designed and experimentally demonstrated. The metamaterial structure is constructed from a multilayer two-directional structure of electrically split ring resonator which exhibits negative refractive index in direction of the radiated wave propagation when it is placed in front of the slotted waveguide antenna. As a result, the radiation beams of the slotted waveguide antenna are focused in both E and H planes, and hence the directivity and the gain are improved, while the beam area is reduced. The proposed antenna and the metamaterial structure operating at 10 GHz are designed, optimized and numerically simulated by using CST software. The e?ective parameters of the eSRR structure are extracted by Nicolson Ross Weir (NRW) algorithm from the s-parameters. For experimental veri?cation, a proposed antenna operating at 10 GHz is fabricated using both wet etching microwave integrated circuit technique (for the metamaterial structure) and milling technique (for the slotted waveguide antenna). The measurements are carried out in an anechoic chamber. The measured results show that the E plane gain of the proposed slotted waveguide antenna is improved from 6.5 dB to 11 dB as compared to the conventional slotted waveguide antenna. Also, the E plane beamwidth is reduced from 94.1 degrees to about 50 degrees. The antenna return loss and bandwidth are slightly changed. Furthermore, the proposed antenna o?ered easier fabrication processes with a high gain than the horn antenna, particularly if the proposed antenna is scaled down in dimensionality to work in the THz regime.
关键词： negative refractive index,slotted waveguide antenna,metamaterial,beam focusing,high gain,electrically split ring resonator
更新于2025-09-16 10:30:52
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[IEEE 2019 Thirteenth International Congress on Artificial Materials for Novel Wave Phenomena (Metamaterials) - Rome, Italy (2019.9.16-2019.9.21)] 2019 Thirteenth International Congress on Artificial Materials for Novel Wave Phenomena (Metamaterials) - Frequency Tunable Monopole Patch Antenna Using Broadside Coupled Split Ring Resonator for Wireless Communication Applications
摘要： This paper presents metamaterial based monopole patch antenna capable of tuning the radiating frequency over a wide bandwidth. The proposed novel antenna structure makes use of the metamaterial properties of Broadside Coupled Split Ring Resonator (BCSRR) for frequency tuning. The magnetic resonant frequency of the proposed antenna can be tuned by slightly adjusting the interplanar distance between the rings of the BCSRR so that the coupling due to effective capacitance and inductance between them can be changed. The desired range of frequency tuning for potential applications like Global System for Mobiles (GSM), Bluetooth, Wi-Fi, Wi-Max, WLAN etc. is achieved by proper designing of the geometrical parameters of BCSRR. The different antennas for different applications in a single device can be replaced with the proposed novel metamaterial based antenna structure.
关键词： monopole patch antenna,wireless communication,frequency tuning,metamaterial,Broadside Coupled Split Ring Resonator
更新于2025-09-16 10:30:52
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On-chip single-mode optofluidic microresonator dye laser sensor
摘要： Optofluidic dye laser devices have great potential as coherent light sources for lab-on-a-chip applications such as sensing and spectroscopy applications, owing to their promising properties as wide wavelength-tunability, proper microfluidic integration, and an extremely miniaturized footprint. The wide emission spectrum of dye molecules and narrow free spectral range of ring resonators, make these lasers inherently multi-mode. In this article, two polydimethylsiloxane-based miniaturized optofluidic ring resonator dye lasers are numerically designed and investigated. First, multi-mode lasing from a single optofluidic ring resonator with a spectral linewidth of 10 nm and a threshold energy density of 2.2 μj/mm2 is demonstrated. Then, by exploiting two coupled optofluidic ring resonators and Vernier effect, single-mode lasing at a center wavelength of 566 nm with a spectral linewidth as small as 5.36×10-4 nm is achieved. Moreover, simulations demonstrate the sensitivity of 500 nm/RIU for the proposed dye laser sensor.
关键词： Optofluidic,Single-mode lasing,Dye laser sensor,Ring resonator
更新于2025-09-16 10:30:52
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[Institution of Engineering and Technology 7th Brunei International Conference on Engineering and Technology 2018 (BICET 2018) - Bandar Seri Begawan, Brunei (12-14 Nov. 2018)] 7th Brunei International Conference on Engineering and Technology 2018 (BICET 2018) - Thermal-based wavelength reconfigurable digital electro-optic D-type flip-flop
摘要： This paper demonstrates the design of a thermally reconfigurable/tunable operating wavelength of the digital electro-optic D-type flip-flop. The design of the D flip-flop is based on the silicon micro-ring resonator as its core component. The optical modulation technique incurred in the micro-ring resonator utilizes the carrier-injection forward-biased PIN ring waveguide. Micro-heaters are applied to the proposed design with controlled heat generation in order to modulate the operational wavelength, thus allowing the proposed design to operate at varying wavelength. This work proceeds with the simulation and time-varying analysis of the proposed design at the data rate of 1Gbps, and the clocking speed of 5Gbps. Two different operating wavelengths of 1550nm and 1552nm are used to show that the proposed design is wavelength reconfigurable via thermal tuning.
关键词： Micro-ring resonator,Flip-flop,Digital,Reconfigurable
更新于2025-09-16 10:30:52
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Novel analysis of the size and orientation dependent resonance phenomenon of the microstrip line coupled complementary split‐ring resonator
摘要： The purpose of this article is to provide a comprehensive investigation on the resonance phenomenon of microstrip line coupled complementary split-ring resonator (CSRR) with different orientation and relative size. It is shown that when the relative size of the CSRR is smaller than the host line, the CSRR with its slit oriented orthogonal to the line axis will not excite effectively and show weak resonance behavior. However, when the slit is positioned along the line axis, the cross-polarization effect comes into play, which excites the CSRR through the mixed coupling. To ensure the correctness, several numerical simulations are carried out for different substrate height and relative permittivity. Finally, a prototype is fabricated and measured for the experimental validation.
关键词： complementary split-ring resonator,split-ring resonator,microstrip line
更新于2025-09-12 10:27:22
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Highly sensitive quarter-mode spoof localized plasmonic resonator for dual-detection RF microfluidic chemical sensor
摘要： In this paper, benefited from ultrathin corrugated metal-insulator-metal (MIM) ring resonator, for the first time, we proposed a dual-detection microfluidic chemical sensor based on quarter-mode spoof LSP resonator with higher sensitivity among all the dual/multichannel microwave chemical sensors. First, we study full-mode spoof plasmonic resonator and we show that the resonance modes of the quarter-mode structure are exactly one-fourth of the full-mode structure. By placing two asymmetric microfluidic channels in the strongest E-field regions, the capability of detecting two aqueous solutions is feasible. By utilizing 85070E performance probe connected to vector network analyzer (VNA), we determined the relative permittivity and loss tangent of fluids under test. Afterward, the fabricated prototype was tested and our experimental results collaborate well our simulation predictions. Our proposed RF sensor exhibits 87% growth in sensitivity (MHz εr? ) compared with the most sensitive previously existing multichannel microwave chemical sensor. Furthermore, we show that our elaborately designed sensor has the potential to detect chemicals with very close dielectric constant corresponding to 1,4-Dioxin, Cyclohexane, n-Hexane with the relative permittivity of 2.12, 2.012, 1.95 respectively.
关键词： RF sensors,microfluidic chemical sensors.,spoof LSP resonator,corrugated MIM ring resonator
更新于2025-09-12 10:27:22
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Long Range Multilayer Hybrid Plasmonic Waveguide Components and Integrated Circuit
摘要： In this work, CMOS compatible hybrid insulator metal insulator (HIMI) planar plasmonic waveguide based components such as, racetrack ring resonator, y-splitter, coupler and dual parabolic profile nano antenna have been proposed and investigated at 1.55 μm operating wavelength for the first time. The proposed components are analyzed at various parametric variations using CST microwave studio. The proposed racetrack ring resonator offers 153.88 nm free spectral range, 0.3232 nm FWHM and 46.57 dB extinction ratio at 0.40 μm radius and 0.49 μm separation length. Y-splitter divides equal power of 46.85% in both output arms and coupler couples till 86.5% power in coupled arm. The dual parabolic profile nano antenna offers a gain, bandwidth and efficiency of 7.99 dB, 203 THz and 84.56 % respectively. Using all the components, HIMI plasmonic integrated circuits have also been designed and investigated for on chip applications. Proposed components work very efficiently in chip scale integrated circuit. This investigation provides groundwork for future chip scale applications.
关键词： splitter,plasmonic,ring resonator,integrated circuit,hybrid,Coupler
更新于2025-09-12 10:27:22
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[IEEE 2019 USNC-URSI Radio Science Meeting (Joint with AP-S Symposium) - Atlanta, GA, USA (2019.7.7-2019.7.12)] 2019 USNC-URSI Radio Science Meeting (Joint with AP-S Symposium) - Terahertz Plasmonic Metamaterial Based Multi-band Band-Pass Filter Using Micro-Ring Resonator
摘要： This paper reports the design and theoretical analysis of the spoof plasmonic metamaterial based multi-band band-pass filter (BPF) using corrugated planar micro-ring resonator at THz frequency. Plasmonic metamaterial i.e. spoof surface plasmon polaritons structures support EM mode at the interface of the metal-dielectric and thus highly confined and localized E-field can be obtained. Due to this sub-wavelength field confinement, spoof SPP structures show low-loss, low crosstalk and low mutual coupling and is being used for developing the compact integrated circuits. Sub-wavelength rectangular grooves are corrugated on the metallic planar ring is fed through the spoof SPP transmission line at its input and output ports to provide a band-pass response. The detailed mathematical analysis is provided for the designed band-pass filter. The Full wave EM simulation is performed to obtain the reflection and transmission coefficient. The designed spoof plasmonic ring resonator will provide a path to design and development of the plasmonic sensors.
关键词： Band-Pass Filter (BPF),Ring Resonator,Plasmonic Metamaterial
更新于2025-09-12 10:27:22
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Novel single-frequency Nd:YAG ring laser by reducing the depolarization loss
摘要： A principle study on reducing the depolarization loss in a single-frequency Nd:YAG ring laser by a novel ring resonator configuration is reported. In the resonator, one cavity mirror with 99.5% reflectivity at 1064 nm for 45-degree incident s-polarized light and about 75% transmissivity for 45-degree incident p-polarized light was employed. Besides, the transmissivity for the 45-degree incident p-polarized and s-polarized light for the output-couple mirror were 32% and 3.5%, respectively. The cavity mirror and the output-couple mirror were utilized as the polarizer to enforce the s-polarized beam unidirectionally operating in the resonator. 2.1 W single-frequency output at 1064 nm with elliptical polarization was obtained from this ring resonator. Compare with the existent Nd:YAG ring resonator, this novel resonator has a potential advantage in reducing depolarization loss and increasing the efficiency.
关键词： Nd:YAG,Depolarization loss,Ring resonator,Single-frequency
更新于2025-09-12 10:27:22
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Direct observation and simultaneous use of linear and quadratic electro-optical effects
摘要： We report on the direct observation and simultaneous use of the linear and quadratic electro-optical effect and propose a method by which higher-order susceptibilities of electro-optical materials can be determined. The evaluation is based on the separation of the second- and third-order susceptibilities and the experimental technique uses a slot waveguide ring resonator fabricated in an integrated photonic circuit technology, which is embedded by a guest-host polymer system consisting of the azobenzene dye disperse red 1 in a poly(methyl methacrylate) matrix as active electro-optical material. The contribution of both effects on the electro-optical response under the influence of static and time-varying electrical fields is investigated. We show that the quadratic electro-optical effect has a significant influence on the overall electro-optical response even with acentric molecular orientated molecules. Our findings have important implications for developing electro-optical devices based on polymer-filled slot waveguides and give rise to advanced photonic circuits.
关键词： higher-order susceptibilities,electro-optical materials,quadratic electro-optical effect,slot waveguide,ring resonator,linear electro-optical effect
更新于2025-09-12 10:27:22