Optical ring resonators
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Splitter/Combiner Microstrip Sections Loaded With Pairs of Complementary Split Ring Resonators (CSRRs): Modeling and Optimization for Differential Sensing Applications Open
This paper focuses on the analysis of splitter/ combiner microstrip sections where each branch is loaded with a complementary split ring resonator (CSRR). The distance between CSRRs is high, and hence, their coupling can be neglected. If t…
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Optical Biosensors Based on Silicon-On-Insulator Ring Resonators: A Review Open
Recent developments in optical biosensors based on integrated photonic devices are reviewed with a special emphasis on silicon-on-insulator ring resonators. The review is mainly devoted to the following aspects: (1) Principles of sensing m…
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Breaking the Loss Limitation of On-chip High-confinement Resonators Open
On-chip optical resonators have the promise of revolutionizing numerous fields including metrology and sensing; however, their optical losses have always lagged behind their larger discrete resonator counterparts based on crystalline mater…
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All-Optical Reservoir Computing on a Photonic Chip Using Silicon-Based Ring Resonators Open
We present in our work numerical results on the performance of a 4 x 4 swirl-topology photonic reservoir integrated on a silicon chip. Nonlinearmicroring resonators are used as nodes. We analyze the performance of such a reservoir on a cla…
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Wideband Microwave Absorber Comprising Metallic Split-Ring Resonators Surrounded With E-Shaped Fractal Metamaterial Open
A specially designed metallic E-shaped fractal-based perfect metamaterial absorber (PMA) with fairly wideband absorptivity in the K- and Ka-bands of the microwave regime was investigated. The PMA top surface is comprised of square-shaped s…
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Ultralow-crosstalk, strictly non-blocking microring-based optical switch Open
We report on the first monolithically integrated microring-based optical switch in the switch-and-select architecture. The switch fabric delivers strictly non-blocking connectivity while completely canceling the first-order crosstalk. The …
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Silicon Photonic Switch Fabrics: Technology and Architecture Open
We present that photonic switching technologies show potential for transforming communication networks across diverse markets from long-haul to short-reach distance scales due to their large bandwidth density, high energy efficiency, and p…
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Microwave Encoders for Chipless RFID and Angular Velocity Sensors Based on S-Shaped Split Ring Resonators Open
In this paper, it is demonstrated that a chain of S-shaped split ring resonators (S-SRRs) etched on a dielectric substrate can modulate the amplitude of a carrier signal injected to a transmission line (a coplanar waveguide (CPW). To this …
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Racetrack Ring Resonator Integrated with Multimode Interferometer Structure Based on Low-Cost Silica–Titania Platform for Refractive Index Sensing Application Open
In this work, a racetrack ring resonator (RTRR) integrated with a multimode interferometer (MMI) structure based on a silica–titania (SiO2:TiO2) platform is projected for refractive index sensing application. The typical ring resonator str…
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Highly Sensitive Reflective-Mode Phase-Variation Permittivity Sensor Based on a Coplanar Waveguide Terminated With an Open Complementary Split Ring Resonator (OCSRR) Open
This paper presents a one-port reflective-mode phase-variation microwave sensor consisting of a coplanar waveguide (CPW) transmission line terminated with a grounded open complementary split ring resonator (OCSRR). The sensor is useful for…
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Ion Implantation in Silicon for Trimming the Operating Wavelength of Ring Resonators Open
In recent years, we have presented results on the development of erasable gratings in silicon to facilitate wafer scale testing of photonics circuits via ion implantation of germanium. Similar technology can be employed to control the oper…
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Low-power microelectromechanically tunable silicon photonic ring resonator add-drop filter Open
We experimentally demonstrate a microelectromechanically (MEMS) tunable photonic ring resonator add-drop filter, fabricated in a simple silicon-on-insulator (SOI) based process. The device uses electrostatic parallel plate actuation to per…
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Double-Slot Hybrid Plasmonic Ring Resonator Used for Optical Sensors and Modulators Open
An ultra-high sensitivity double-slot hybrid plasmonic (DSHP) ring resonator, used for optical sensors and modulators, is developed. Due to high index contrast, as well as plasmonic enhancement, a considerable part of the optical energy is…
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High-sensitivity and wide-range optical sensor based on three cascaded ring resonators Open
We demonstrate a three cascaded micro-ring resonators based refractive index optical sensor with a high sensitivity of 5866 nm/RIU, the measurement range of which is significantly improved 24.7 times comparing with the traditional two casc…
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A Topological Photonic Ring-Resonator for On-Chip Channel Filters Open
A topologically protected ring-resonator formed in valley photonic crystals is proposed and fabricated on a silicon slab. The unidirectional transmission and robustness against structure defects of its resonant modes are illustrated. Coupl…
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Tunable squeezing using coupled ring resonators on a silicon nitride chip Open
We demonstrate continuous tuning of the squeezing-level generated in a double-ring optical parametric oscillator by externally controlling the coupling condition using electrically controlled integrated microheaters. We accomplish this by …
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Gigahertz optical tuning of an on-chip radio frequency photonic delay line Open
Rapid and continuous tunability of time delay is a crucial functionality for radio frequency (RF) photonic signal processing systems. Recent developments in photonic integration have enabled realizations of integrated microwave photonic (M…
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Athermal silicon ring resonators clad with titanium dioxide for 13µm wavelength operation Open
We investigate the athermal characteristics of silicon waveguides clad with TiO(2) designed for 1.3 µm wavelength operation. Using CMOS-compatible fabrication processes, we realize and experimentally demonstrate silicon photonic ring reson…
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Dual Notch Microwave Sensors Based on Complementary Metamaterial Resonators Open
In this paper, three dual notch microwave sensors are presented based on a microstrip transmission line and complementary metamaterial resonators. The main aim of this paper is to compare the constitutive parameters and sensitivity of all …
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Tunable Q-factor silicon microring resonators for ultra-low power parametric processes Open
A compact silicon ring resonator is demonstrated that allows simple electrical tuning of the ring coupling coefficient and Q-factor and therefore the resonant enhancement of on-chip nonlinear optical processes. Fabrication-induced variatio…
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Multiple Fano Resonances Based on End-Coupled Semi-Ring Rectangular Resonator Open
In this paper, multiple Fano resonances based on semi-ring-rectangular composite cavity (SRRCC) structure are numerically investigated and explained by the finite-difference time-domain method and the multiple interference coupled mode the…
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Experimental demonstration of an optical Feynman gate for reversible logic operation using silicon micro-ring resonators Open
Currently, the reversible logic circuit is a popular research topic in the field of information processing as it is a most effective approach to minimize power consumption, which can achieve the one-to-one mapping function to identify the …
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High-Selectivity On-Chip Optical Bandpass Filter With Sub-100-MHz Flat-Top and Under-2 Shape Factor Open
We demonstrate a fully tunable microwave photonic bandpass filter fabricated with Si3N4/SiO2 waveguides on a chip. The filter is based on coupled resonator optical waveguide architecture comprising a chain of eight coupled ring resonators,…
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Detection of Semi-Solid Materials Utilizing Triple-Rings CSRR Microwave Sensor Open
This article proposes the design, fabrication and measurement of a triple-rings complementary split-ring resonator (CSRR) microwave sensor for semi-solid material detection. The triple-rings CSRR sensor was developed based on the CSRR conf…
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Cascaded Mach–Zehnder Architectures for Photonic Integrated Delay Lines Open
A continuously tunable integrated optical delay line architecture with large bandwidth and bandwidth-delay product is proposed and demonstrated. The non-resonant delay line is based on cascaded Mach-Zehnder interferometers with tunable cou…
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Performance improvements of a tunable bandpass microwave photonic filter based on a notch ring resonator using phase modulation with dual optical carriers Open
A tunable bandpass microwave photonic filter can be achieved by using a notch ring resonator with optical phase modulation. However, the filter's out of band rejection ratio and shape factor are limited due to the ring resonator's residual…
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Wavelength conversion of data at gigabit rates via nonlinear optics in an integrated micro-ring resonator Open
We present the first system penalty measurements for all-optical wavelength conversion in an integrated ring resonator. We achieve wavelength conversion over a range of 27.7nm in the C-band at 2.5 Gb/s by exploiting four wave mixing in a C…
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Tunable Silicon Photonic RF Phase Shifter With Low RF Power Variation Based on Constructive Interference of an Add-Drop Ring Resonator Open
We propose and experimentally demonstrate a tunable silicon photonic radio frequency (RF) phase shifter with low power variation based on constructive interference of an add-drop ring resonator. The thermal nonlinear effect of the add-drop…
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Modelling and Measurements of the Microwave Dielectric Properties of Microspheres Open
A microwave microstrip sensor incorporating a split ring resonator is presented in this paper for microsphere detection and dielectric characterization within a microfluidic channel. Split ring resonator (SRR) sensor of three different rad…
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Gold-on-glass microwave split-ring resonators with PDMS microchannels for differential measurement in microfluidic sensing Open
This paper describes a microwave resonator incorporating microfluidic lab-on-chip sensor system capable of performing simultaneous differential measurement based sensing of liquid samples. The resonators are split-ring resonator shapes mad…