A generic ring resonator con sists of an optical waveguide which is looped back on itself, such that a resonance occurs when the optical path. Microwave and rf applications for microresonator based. The aim of biofos is to develop a simple, fast, lowcost, sensitive, portable and reliable, screening tool for insitu detection of food contaminations. It is a four port micro ring resonator with radius 5. Boriskina, phillip sewell, ana vukovic1, stephen c. Degtyarev and others published 3d simulation of silicon microring resonator with comsol find, read and cite all the research you need on researchgate. The work comprises the comparison of three types of delay lines namely scissor, crow and ringloaded mzt interferometer based delay line.
Optical ring resonator as a biological sensing platform. Koonen cobra institute, eindhoven university of technology, nl 5600 mb eindhoven, the netherlands z. On the other hand, a microring resonator consisting of a ring plus two. Integrated optical networks of microring resonators. The reusable biosensor system will be based on optical interference and labonachip loc. Our pdf merger allows you to quickly combine multiple pdf files into one single pdf document, in just a few clicks. Combine multiple pdf files into one pdf, try foxit pdf merge tool online free and easy to use.
All the study are based on numerical simulation method. A generic ring resonator consists of an optical waveguide which is looped back on itself, such that a resonance occurs when the optical path length of the resonator is exactly a whole number of. This thesis introduces three main research projects completed by dachuan wu. Physical model, timedomain model, transmission spectra and energy transfer diagram of siliconbased microring resonators based on the parallel waveguide structure are analyzed in this paper, in which transmission spectrum is obtained by matlab, and the energy transfer process is analyzed by rsoft.
Abstract metamaterials are artificial materials that are known to produce extraordinary electromagnetic responses due to their constituent artificiallyengineered micro or nanostructures of dimensions smaller than that of the wavelength of light. The split ring resonator srr is such a nanostructure that forms the basic unit of a metamaterial. Easily combine multiple files into one pdf document. In this paper, the design of a microring resonator electrooptical modulator using a pn junction embedded in a rib waveguide is reported. More specifically, we explore the force that acts on a free standing bus wg as a result of the circulating light in the resonator. Ring resonator based bio sensors using microcantilever. That is, it naturally oscillates with greater amplitude at some frequencies, called resonant frequencies, than at other frequencies. Ring resonators find applications not only in optical networks, but also as sensors.
Two basic configurations of an optical micro ring resonator. Department of electrical and electronic engineering. The oscillations in a resonator can be either electromagnetic or mechanical including acoustic. According to the analyses of the models and results, the. Optical transmission characteristics of fiber ring resonators. At the other end of the spectrum, polymer optical biosensors offer low cost, simple fabrication, but suffer from lower sensitivities than silicon equivalents 10,12, 2022. The resonant frequencies are also high for the singlysplit single. When a strong optical control pulse and a weak cw probe light are coupled into the ring resonator through two different resonances, the control pulse generates free carriers in the ring resonator due to the twophoton absorption tpa effect. An optical ring resonator is a set of waveguides in which at least one is a closed loop coupled to some sort of light input and output. Carbohydrate binding studies are well suited to ring resonatorbased interrogation based on both the diversity of binding partners and wide range of binding affinities. A dynamic model for the transmission of a microring modulator based on changes in the refractive index, loss, or waveguidering coupling strength is derived to investigate the limitations to the intensity modulation bandwidth. Resonators are used to either generate waves of specific frequencies or to. A resonator is a device or system that exhibits resonance or resonant behavior. Merge pdf online combine pdf files for free foxit software.
Microring resonators mr represent a class of filters with characteristics very similar to those of. The input light is split into the four ring resonators using directional couplers with a gap of 600 nm. Design of an energyefficient silicon microring resonator. The cladding of the circular optical waveguide comprises an electrooptic polymer with an index of refraction that can be changed through application of an electric. Coupledringresonatorbased silicon modulator for enhanced performance yunchu li1, lin zhang 1, muping song 1,2, bo zhang, jengyuan yang1, raymond g. A compact design of microring resonator chains for optical phase manipulation z. With a new type of resonator cavity, researchers hope to combine high quality optics and mechanical systems into one tightly compact package. According to 9, srr can be excited by a timevarying external magnetic. Bandreject filters using splitring resonator and complementary splitring resonator volkan oznazl. Ring resonator simulated in lumerical mode solutions propagator duration.
Polymers are commercially available with a range of thermal, mechanical, and optical properties, and can be readily functionalized for the immobilization of biomolecular sensing agents. Introduction and basic theory of integrated ring resonator and micro lens 1. Silicon microring resonators photonics research group. Allpass ring resonators in its simplest form a ring resonator can be constructed by feeding one output of a directional coupler back into its input, the socalled allpass. The resonant frequency increases if only one of the rings is split. A microring resonator includes a bus optical waveguide and a circular optical waveguide positioned adjacent to the bus optical waveguide so as to provide evanescent coupling of light between the waveguides.
Loaded mzt interferometer configuration consists of array of microring resonators connected to the upper arm. Equivalent circuit model of double split ring resonators article pdf available in international journal of microwave and optical technology vol. Design and modeling of waveguidecoupled singlemode microring resonators m. Two straight waveguides are evanescently coupled to the cavity. Circular optical microresonators contents ringresonator theory for the sake of further understanding, consider the typical abstract setting of a horizontally coupled circular microresonator as sketched in figure 1. Note that this circuit has a fundamental difference to the previous ones. A study on refractive index sensors based on optical micro.
This first two are based on integrated ring resonator, a novel, ultrasmall size, and widely used component in the field of photonics, telecommunications, and sensing technology. Bretagnesud, ea 4250, limatb, f56100 lorient, france. There is a great potential of microringresonators as optical adddropmultiplex modules in photonics with very large scale integration. Numerical study of integrated micro ring resonator and. Design and modeling of waveguidecoupled singlemode.
A novel high q resonator is described that is suitable for magnetic resonance in the frequency region 2002000 mhz, where ordinary cavities are generally too bulky and solenoidal coils impractical. How to merge pdfs and combine pdf files adobe acrobat dc. The gap and coupling length between the bus waveguide and the resonator are 600 nm and 35. Sensitivity and limit of detection of biosensors based on. The concepts behind optical ring resonators are the same as those behind whispering galleries except that they use light and obey the properties behind constructive interference and total internal. Figure 1 shows a ring resonator that was the basis of the integrated optical parametric oscillator. A reverse bias of 10v is applied to the junction and shows the possibility to achieve a high modulation depth. Pdf 3d simulation of silicon microring resonator with. The microstrip ring resonator for characterising microwave. Another trend will be towards mrbased devices, which combine active.
Whispering gallery mode resonator optical resonators form an integral part of lasers and many other photonic devices. Silicon microring resonatorbased alloptical digitalto. Alloptical logic based on silicon microring resonators. The 1st generation silicon ring modulator wirebonded with 4vpp cmos driver achieves 12. Biofos is a specifictarget research program strep cofunded by the european commission under the 7th framework programme. The ring resonator is consisting of waveguides where one waveguide is a closed loop, and it will couple the light input and output.
As a resonator with several well defined resonant frequencies for the purposes of measuring microstrip properties 2. Ring resonator with porcelain material in the gap 31 figure 3. The term ring resonator is typically used to indicate any looped resonator, but in the. Split ring resonator srr based metamaterials enlighten. Microoptical resonators for microlasers and integrated optoelectronics recent advances and future challenges trevor m. Ring resonators play an important role in the success of silicon photonics, because silicon enables ring resonators of an unprecedented small size. The simplest configuration of a microring resonator consists of a unidirectional coupling between a waveguide and a ring resonator, as we can see in fig.
These can be, but are not limited to being, waveguides. Sabah johann wolfgang goethe university physikalisches institut maxvonlauestrasse 1, d60438, frankfurt am main, germany abstractin this paper, we study tunable metamaterial structures whose unit cell has triangular split. A resonator structure is presented comprising a closed loop resonator waveguide having a width varying over the circumferential region of the resonator waveguide. Biofos microring resonatorbased biophotonic system for. The resonator structure can be used in various applications, such as optical filters, lasers, modulators, spectrum analyzers, wavelockers, interleave filters, and optical add drop multiplexers. A compact design of microring resonator chains for. Based on previous works, we use the coupled mode theory cmt to develop a new model which provides better understanding of the of in the vicinity of the resonance. As a narrowband antenna, possibly operating at a higher mode where the bandwidth is wider and somewhat more useful 3. Silicon microring modulator modeling yonsei university. Study of energy transfer in siliconbased microring. Microring resonator theory a microring resonator is an optical component to con ne light bytotal internal re ectiontir, whichcan be createdby micro nano fabrication techniques. Nosich1,2 1george green institute for electromagnetics research, university of nottingham, nottingham ng7 2rd, uk.
Modulation bandwidths approaching the free spectral range frequency are possible if the waveguidering coupling strength is varied, rather than the. This book describes the current stateoftheart on these devices with respect to design, fabrication and application. Our laboratory results are in excellent agreement with theoretical predictions. The microringresonator mrr consists of unidirectional coupling between a ring resonator and inputoutput waveguides. Performance analysis of different micro ring resonators. A microring or optical ring resonator is a device that essentially uses the same principles as those found in whispering galleries, except that instead of sound, they use light. Analysis of the optical force in the micro ring resonator. Microring resonatorbased optical corrosion sensing 2. An optical ring resonator usually consists of a straight waveguide coupled to a circular one, as shown in figure 1a, or two straight waveguides coupled through a circular one, as shown in figure 1b. Integrated polymer microring resonators for optical.
Optical microring resonator based corrosion sensing. A transparent broadband ultrasonic detector based on an. New microring resonator creates quantum entanglement on a. Strictly speaking this should forbid the calculation, since not all the inputs are known at the beginning of calculation. The figure of merit of this compact depletion modulator is estimated to be lp. Although the formulas used do not distinguish which coefficient is coupling and which is loss, it is shown how these coefficients can be disentangled based on how they vary with wavelength or device. Extracting coupling and loss coefficients from a ring. A fraction k 1 coupling coefficient between input wave guide and the ring of the incoming field is transferred to the ring having radius r as shown in fig. This free online tool allows to combine multiple pdf or image files into a single pdf document.
Applications in multiplexed diagnostics and interaction screening. Design of a microring resonator electrooptical modulator. The required passband shape of ring resonatorfilters can be custom designed by the use of configurations of various ring coupled resonators. A method is developed for extracting the coupling and loss coefficients of ring resonators from the peak widths, depths, and spacings of the resonances of a single resonator. Design of microring resonator based alloptical parity.