Ruoxi Yang, Rami A. Wahsheh, Zhaolin Lu et al. · Optics Letters · 2010
An efficient coupler between a dielectric waveguide and a plasmonic metal-insulator-metal (MIM) waveguide is proposed, modeled, fabricated, and characterized. Based on the platform of a silicon slot waveguide, a quasi-MIM plasmonic junction is formed via e-beam lithography and lift-off process. Coupling efficiency between the silicon slot waveguide and plasmonic waveguide up to 43% is obtained after normalizing to reference waveguides at 1550 nm. This coupling scheme can be potentially used for fast optical switching and small-footprint optical modulation.
Cited by 86
Carlos Angulo Barrios, Kristinn B. Gylfason, Benito Sánchez et al. · Optics Letters · 2007
We report an experimental demonstration of an integrated biochemical sensor based on a slot-waveguide microring resonator. The microresonator is fabricated on a Si3N4-SiO2 platform and operates at a wavelength of 1.3 microm. The transmission spectrum of the sensor is measured with different ambient refractive indices ranging from n=1.33 to 1.42. A linear shift of the resonant wavelength with increasing ambient refractive index of 212 nm/refractive index units (RIU) is observed. The sensor detects a minimal refractive index variation of 2x10(-4) RIU.
Cited by 368
A.J. Farrall, Paul R. Young · Electronics Letters · 2004
Waveguide slot antennas integrated on microwave laminate are presented, and single and dual slot antennas are described, which operate at 10 GHz.
Cited by 74
Takuichi Hirano, Jiro Hirokawa, Makoto Ando · IEE Proceedings - Microwaves Antennas and Propagation · 2003
A matching crossed-slot, which is accommodated at the shorted end of a waveguide crossed-slot array and radiates all the residual power with circular polarisation in an array beam direction, is analysed and designed by the method of moments (MoM). The eigenmode functions for a crossed-slot derived numerically by the edge-based finite element method (FEM) are utilised as the basis functions in the MoM. The mechanism of circular polarisation is interpreted in terms of two modes each radiating linear polarisation. A matching crossed-slot is designed and tested at 3.6 GHz. The measured reflection is suppressed below –15 dB over a 5.6% bandwidth from 3.5 GHz to 3.7 GHz. The calculated and measured axial ratios in a direction of 50 degrees are 0.32 dB and 1.5 dB, respectively.
Cited by 13
廣川二郎, JIRO HIROKAWA, 張 淼 et al. · Tokyo Tech Research Repository (Tokyo Institute of Technology) · 2019
Cited by 0
Ivan P. Kaminow, R. Stegen · 1954
Cited by 30
M. Roussey, Leila Ahmadi, Ségolène Pélisset et al. · Optics Letters · 2017
We introduce a novel concept for an optical waveguide called a strip-loaded slot waveguide. It allows an extraordinary confinement of the field in a waveguide with an extremely tiny (vertical) cross section. Unlike conventional slot waveguides, the proposed configuration has potential for very low propagation losses. Its operation is demonstrated at telecommunication wavelengths and, in addition, it is fabricated by means of mass production compatible techniques: atomic layer deposition and nanoimprint replication. The possibility to fabricate the proposed structure with such low-cost techniques opens a new path for a variety of nanophotonics applications.
Cited by 24
N. K. Blinova, L. P. Yatsuk · 2002
The frequency band properties of two closely positioned longitudinal slots in the broad wall of a rectangular waveguide (one being positioned in the middle of the wall) are studied. It is shown that this radiator is very efficient and narrow-band, especially, when the slots are filled with dielectric. The system of two double-slots is considered as well.
Cited by 0
Amrita Pati, Reuven Gordon · Research Square · 2022
Abstract Plasmonic slot waveguides provide extreme light confinement with the benefits of having naturally present electrodes for switching and high thermal conductivity of the metal layers to remove excess heat. Past works relied on numerical computation for these structures, which is time-consuming and lacks physical insight. Here we present an analytical model of plasmonic slot waveguides to determine the modal properties based on single-mode matching to continuum. The model is accurate to within 3% of rigorous numerical simulations. The theory provides rapid design and physical insight into mode propagation in plasmonic slot waveguides for information processing, optical manipulation, and sensing applications.
Cited by 0Open access
Wen Zhou, Zhenzhou Cheng, Xinru Wu et al. · Journal of Applied Physics · 2018
A fully suspended slot waveguide (FSSWG) platform, including straight slot waveguides, 90° bends, high-Q racetrack resonators, and strip-to-slot mode converters, is demonstrated for broadband and low-loss operation in the mid-infrared spectral region. The proposed FSSWG platform has inherent merits of a broad spectral range of transparency which is limited only by the absorption of silicon, strong light–analyte interaction, good mechanical stability, and single lithography step fabrication process. By using asymmetric FSSWGs, the propagation loss, bending loss, and intrinsic optical Q factor are demonstrated to be 2.8 dB/cm, 0.15 dB/90°, and 12 600, respectively. The average conversion efficiency of a mode converter is 95.4% over a bandwidth of 170 nm and 97.0% at 2231 nm. The FSSWG platform would be promising for a long-range and cavity-enhanced light–analyte interaction.
Cited by 41
廣川 二郎, J. Hirokawa, 安藤 真 et al. · Tokyo Tech Research Repository (Tokyo Institute of Technology) · 2020
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Allen H. J. Yang, Tadsanapan Lerdsuchatawanich, David Erickson et al. · 2008
Additional resources and features associated with this article are available within the HTML version:
Cited by 0
平野 拓一, Takuichi Hirano, 廣川 二郎 et al. · Tokyo Tech Research Repository (Tokyo Institute of Technology) · 2007
Cited by 0
Amrita Pati, Reuven Gordon · Plasmonics · 2023
Cited by 11
Avinash Chandra, Sushrut Das · 2015
In this paper the analysis of tilted slots, milled on both the broad walls of a twisted waveguide is presented. Based on the design a twisted waveguide slot antenna has been fabricated and measured. Simulated data show good agreement with measured data. The proposed antenna shows measured -10 dB impedance bandwidth of 24.64% (9.32-11.94 GHz) and simulated gain of 10.4 dBi.
Cited by 3
Johan Wettergren · Chalmers Publication Library (Chalmers University of Technology) · 1997
Waveguide slot antennas with longitudinal and transverse slots are analyzed using a rigorous method. The antennas are divided into regions, which are analyzed separately and matched by a moment method procedure. At the apertures between the regions, the electric fields are expanded in trigonometric basis functions. These apertures appear at the inside and outside of the slots in order to take the waveguide wall thickness into account. The shape of the exterior structure of the slot antenna is assumed to be a cylinder with arbitrary cross section. The exterior fields and currents are Fourier transformed along the structure. An integral equation is set up and solved in the spectral domain, i.e. where the time and longitudinal coordinates have been transformed. Its solution is found numerically with the moment method, since general cylindrical structures are treated. The induced electric currents on the structure are expanded in subsectional basis functions formed as triangles and pulses. The spectral magnetic field and the spectral mutual admittances are determined from the computed values of the spectral induced currents. The spectral mutual aperture admittances are inverse transformed and included in the overall slot antenna analysis.
Cited by 3
Xiaochuan Xu · OSTI OAI (U.S. Department of Energy Office of Scientific and Technical Information) · 2023
Apparatuses for communication or sensing are disclosed, the apparatuses comprising a substrate; a bottom cladding disposed on the substrate; a device layer disposed on the bottom cladding, wherein the device layer comprises: two substantially parallel rails extending from an input side to an output side of the device layer and configured to form a slot between the two substantially parallel rails, wherein each of the two substantially parallel rails comprises an inner edge adjacent to the slot and an outer edge opposite the slot; and one or more teeth coupled to each of the two substantially parallel rails; and a top cladding disposed onto the device layer and bottom cladding; wherein the bottom cladding, the device layer, and the top cladding are configured to support at least one optical guided mode. Other embodiments are described and claimed.
Cited by 0Open access
Sevag Abadian, Giovanni Magno, Vy Yam et al. · 2021
Optical transmission non-reciprocity requires a propagation medium that simultaneously offers time and spatial symmetry breaking [1] . In the quest for integrated optical isolator, different physical mechanisms have been proposed, explored and improved to attain time-reversal breaking such as magneto-optics (MO) [2] , optical nonlinear methods [3] , dynamic modulation [4] or optomechanical interactions [5] . Transverse Magneto-Optical Kerr Effect (TMOKE) has appeared as the most relevant non-reciprocal effect to be used in guided configurations, enabling either non-reciprocal intensity transmission [6] or non-reciprocal phase shift in interferometric or resonant structures [2] . Very recently, another TMOKE based mechanism has been explored by the authors, which induces asymmetrisation of guided modes in MO slot waveguides [7] , [8] : the combination of magneto-plasmonic and coupled modes in this mechanism, is called "magneto-biplasmonic" effect. Due to this phenomena, the light propagates mainly on one side of the slot waveguide in forward direction, and along the other side in backward direction ( Fig. 1 ). By inserting absorbers on only one side, isolation function is obtained. The slot waveguide is a gold-BIG-gold structure, where BIG is a MO garnet. Since the asymmetrisation operates on the long-range (LR) or short-range (SR) surface plasmon polariton (SPP) coupled modes, the isolating structure must be interfaced with a single TE mode waveguide to realize full integration and selectively excite only the LRSPP mode ( Fig. 2 ).
Cited by 0
F. Goebels, C. Nonnemaker · 1963
Abstract : A series of experiments is described on a novel technique which permits a slot radiator in a waveguide to switch its radiation on and off by means of a compact circuit located at the plane of the slow and within the wall thickness of the waveguide feed line. As described in this report, the switching technique is applied to an end-plate series slot. It is electronically operated by means of a d.c. biased varactor diode. As a reference, the switch characteristics when operated by a mechanical tuning plunger are also given. An analytical description of the technique is also included. The experiments were conducted at S-band and at X-band. The S-band model when operated mechanically provided a slot switching ratio of 38 db and when operated electronically gave a ratio of 35.6 db. Similar operation with an X-band model yielded 50 db and 16.1 db, respectively. These results were obtained at the original resonant frequency of the slot, i. e., the presence of the switching circuit did not change the slot resonant frequency. Such electronically controllable slots hold promise for increasing the versaility of waveguide slot arrays. They may also find application in electronically controlled digital phase shifters.
Cited by 0
Marianne Hiltunen · 2014
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