The organic wavelength selective reflectors show angular dependency. Ultranarrowband wavelengthselective thermal emission. For practical use as a wavelength selective reflector, a buffer layer under the phc slab is employed to sustain the nanorods in the phc slab. Reflector antennas paraboloidal reflectors antennas useful for radio astronomy at short wavelengths must have collecting areas much larger than the collecting area o4u of an isotropic antenna and much higher angular resolution than a short dipole provides. Widely tunable wavelengthselective reflector using polymer. Download scientific diagram the basic structure of a wavelengthselective reflector which is based on two coupled cavities. Study of a multilayer wavelengthselective reflector prepared by the solgel process. Hotelectron photodetector with wavelength selectivity in.
Citeseerx document details isaac councill, lee giles, pradeep teregowda. Unlike conventional tpp structures that have a thin metal layer on a distributed bragg reflector dbr, the proposed structure has a thick metal under a dbr that is more robust for thermal radiation. A semiconductor tunable laser using a wavelength selective. Utilizing the proposed tunable reflector, a compact, 100ghzchannelspaced tunable laser is demonstrated. The proposed wss module length is only 10 cm, taking an advantage of the large angular dispersion in the bragg reflector waveguide. Net reflector is a paid development application that is compatible with windowsbased computers. The device is designed and analyzed using the transfermatrix method. High reflectors, or simply, mirrors, reflect incident light. Wavelengthselective, integrated resonance detector for. In some cases, mirrors perform this function over a very broad wavelength range, and in some instances, they operate at just a single wavelength e. Multilayer wavelengthselective reflector films for lcd applications article pdf available in ieice transactions on electronics e96c11.
Opto diode corporation, a global supplier of advanced performance photodiodes and highly reliable, visible and ir leds, introduces the first in a series of three new selective wavelength photodiodes. Functionring as a wavelength selective notch reflector, the device can be used in optoelectronic applications. Aslanoglou b institute of materials science, national centre of sientific research demokritos, athens, greece b department of physics, university ofloannina, loannina, greece received 10 july. Moreover, the reflector can be made tunable by using the thermaloptic or electrooptic effect. Modeselective hybrid plasmonic bragg grating reflector. Using the photometer setup, it was found that the proposed setup exhibited high precision in terms of transmittance measurements of the dye solutions due to. Widely tunable wavelengthselective reflector using polymer waveguide doubleringresonator adddrop filter and loopback mirror. A dual band cassegrain antenna system operable at any polarization is described wherein the hyperbolic subreflector is made to reflect signals at a first band of frequencies and to transmit or pass signals at a second lower band of frequencies. The basic structure of a wavelengthselective reflector which is. Inplane thermally tuned silicononinsulator wavelength.
Jul 07, 1987 a preferred embodiment of the invention is therefore characterized in that a reflector in the channel for the blue picture is a wavelength selective reflector which almost exclusively reflects blue light. With the proposed configuration, by electrically driving the integrated micro heaters, a single reflection wavelength with narrow. We propose and implement four simple and compact dual wavelength laser concepts integrated in a photonic integrated circuit pic based on a inp generic foundry platform. Multilayer wavelength selective reflector films for lcd. A costeffective fabrication of sio2tio2 multilayer reflectors is explored. Moreover fss also provides shielding to the antenna against nearby conductive elements 6. Frequency selective surface, reflection phase, bandstop, wideband, reflector 1. This paper presents the preparation and study of tio 2 sio 2 distributed bragg reflectors. A mode selective grating reflector based on a hybrid plasmonic waveguide, together with a twotoone coupling structure, is proposed and analyzed. Color picture projection system with a wavelengthselective. Fsss are periodic arrays of metallic patch or apertures on a dielectric slab and are used for fully. Spie 6824, semiconductor lasers and applications iii. The parabolic reflector transforms an incoming plane wave traveling along the axis into a spherical wave. Wavelengthselective reflector based on a circular array of coupled.
Dec, 2005 we present an all optically tunable wavelength selective reflector for planar lightwave technology based on coupled microring resonators. The finitedifference timedomain fdtd simulation results. A transparent wavelengthselective retroreflector allows visible light to pass therethrough and selectively retroreflects. In the presented cdf the drop and reflector sections were composed of two coupled cavities, which provide a higher quality factor in respect of singlecavity based cdfs. A new wavelength selective tunable bragg reflector based. The coupling mode theory cmt is employed to drive the necessary conditions for achieving 100% drop efficiency. A wavelength selective reflector, composed of a doubleringresonator adddrop filter and a loopback mirror at the drop port to be used for a hybridintegrated tunable laser is designed and fabricated. The content of the open access version may differ from that of the licensed version. We computationally designed an ultranarrowband wavelength selective thermal radiator via a materials informatics method alternating between bayesian optimization and thermal electromagnetic field calculation. Elsevier december 1995 materials letters 25 1995 265269 study of a multilayer wavelengthselective reflector prepared by the solgel process c.
Citeseerx wavelengthselective reflector based on a. Narrowband reflection peaks can be achieved without the need for additional complex lithography and processing steps. Dihler institut fdr technische physik, universifiit erlangennijrnberg erwinrommelstrase 1, d8520 erlangen, f. N input ports, an inputside fiber array, an inputside collimator array, an inputside beam deformation and polarization conversion component, an inputside wavedemultiplexing component, an inputside switching engine, a focusing transformation lens group, an outputside switching engine, an outputside wavecombining component, an outputside beam. The number of dbr pairs is a critical factor in maximizing the. All optically tunable wavelengthselective reflector. Wavelength tunable distributed bragg reflector laser. Oct 14, 2019 we propose and implement four simple and compact dual wavelength laser concepts integrated in a photonic integrated circuit pic based on a inp generic foundry platform. In recent years, these research systems have blazed new trails in optical engineering, opening up new concepts in spectroscopy, diagnostic imaging, and metrology. These multilayer structures were prepared by adopting an easy and costeffective solgel spin coating approach. Narrowband wavelength selective thermal emitters by. We propose and analyze a novel type of wavelengthselective reflector for planar lightwave technology based on a circular array of coupled microring resona. Reconfigurable wavelengthselective reflector consisting.
A novel tunable wavelength selective reflector based on. Hexagonal gan nanorodbased photonic crystal slab as. The photoresponse matches the absorptance spectrum, with a maximum value of 8. Ep1096297a2 wavelength selective variable reflector. The monolithic distributed bragg reflector dbr laser is making these instruments commercially viable.
Pdf widely tunable wavelengthselective reflector using. A dual layer frequency selective surface reflector for. A dual layer frequency selective surface reflector for wideband applications. Abstract passive devices made of sio 2 tio 2 bilayers have been demanded for the molding of electromagnetic waves in optical waveguides, microcavities, solar cells, sensors and so on. Osa widely tunable wavelengthselective reflector using. May 02, 2012 organic polymeric chiral nematic liquid crystalline cholesteric wavelength selective mirrors can increase the efficiency of luminescent solar concentrators lscs when they are illuminated with direct sunlight normal to the device. Wavelengthselective, integrated resonance detector for electromagnetic radiation. Wavelength stability in a hybrid photonic crystal laser through.
Wavelength selective reflectors have been widely used in lightemitting diodes, microcavities, waveguides, solar cells and many more. A porous siliconbased psi distributed bragg reflector dbr, with experimental peak reflectance centered at. The use of the dielectric reflector in place of other types of reflectors increases the available reflectivity and permits a preselected color or wavelength to be preferentially reflected. The radii of the rings are slightly different from each other to. We design a photonic spherearray nanoantenna na exhibiting both strong directionality and wavelength selectivity. The application of fiber grating reflector is a wavelength selective reflector based on this environment, which aims to improve the fast and. Compact wavelength selective switch using a bragg reflector waveguide array with ultralarge number 100 of output ports. There is an open access version for this licensed article that can be read free of charge and without license restrictions. Jan 29, 1980 this reflector is suitable for use on the reflecting electrode of a liquid crystal video display panel fabricated on a semiconductor substrate. This paper presents a novel narrow band wavelength selective optical reflector implemented by indirectly coupling two micro ring resonators in silicononinsulator technology. A wavelength selective reflector thermally tuned by semiconductor resistors placed in proximity to the microring elements is proposed as a mirror in a hybrid silicon tunable laser application.
Osa highly efficient channeldrop filter with a coupled. Yariv, compact microringbased wavelength selective inline optical reflector, ieee photon. In this paper, we propose a novel tunable wavelength selective reflector for planar lightwave circuits based on microring resonators. We propose and demonstrate a novel reconfigurable wavelengthselective reflector for planar lightwave technology based on coupled microring resonators. They are generally distinguished from other wavelength selective coatings in that there is little or no concern about what happens. The arrangement may function as a wavelength selective variable reflector, or as a wavelength selective variable attenuator. Reflector antennas national radio astronomy observatory. We demonstrated arbitrary switching among 182 output ports by using a liquid crystal on silicon as a switching engine. A modeselective grating reflector based on a hybrid plasmonic waveguide, together with a twotoone coupling structure, is proposed and analyzed. Abstractwe propose and analyze a novel type of wavelengthselective reflector for planar lightwave technology based on a circular array of coupled microring resonators. Narrowband reflection and strong sidelobe suppression are demonstrated in an. A parabolic or paraboloid or paraboloidal reflector or dish or mirror is a reflective surface used to collect or project energy such as light, sound, or radio waves. By employing the vernier effect, we demonstrate narrowband reflection and strong sidelobe suppression in an optical polymer device fabricated by soft lithography.
One of the mirrors is a broadband reflector and the other mirror is wavelength selective so that gain is favored on a single longitudinal mode, resulting in lasing at a single resonant frequency. Unidirectional and wavelength selective photonic spherearray nanoantennas slide 15 the 33rd progress in electromagnetics research symposium march, 2528, 20, taipei. By this way, a wavelengthselective reflector can be fabricated and tuned via. Reflectance modulation using sio2tio2 multilayer structures. Distributed feedback dfb lasers 2 show similar behavior when a. Dielectric reflector for selective wavelength reflection. Download citation all optically tunable wavelengthselective reflector consisting of coupled polymeric microring resonators we present an all optically tunable wavelengthselective reflector. Study of a multilayer wavelengthselective reflector. A transparent wavelengthselective retroreflector allows visible light to pass therethrough and selectively. The grating structure is designed to reflect only the fundamental even mode existing in the hybrid plasmonic waveguide, and to pass through the fundamental odd mode at a 1550nm wavelength with an extinction ratio of. Colorselective holographic retroreflector array for sensing. Wavelength stability in a hybrid photonic crystal laser. Wavelengthselective reflector based on a circular array. Tunable wavelength selective semiconductor laser systems.
Crosstalk investigation in channeldrop filters with coupled. The wavelength selective reflector operates to transmit the emitted primary light, while preventing the converted secondary light from propagating back to the light source. We design a directional and selective photonic na composed of a single sphere reflector and. The reflector only retroreflects light within a specific wavelength range, as determined by the. Introduction frequency selective surfaces fsss are wireless counterpart of traditional filters that are used in radio frequency rf circuits. Reconfigurable wavelengthselective reflector consisting of. Paloczi, student member, ieee, jacob scheuer, member, ieee, and amnon yariv, life fellow, ieee abstractwe present a novel design for a compact planar in tegrated optic re.
The broadband mirror is usually coated with a low reflectivity coating to allow emission. Download pdf 154 kb abstract we propose and analyze a novel type of wavelength selective reflector for planar lightwave technology based on a circular array of coupled microring resonators. Tunable narrow band optical reflector based on indirectly. Cavityresonatorintegrated guidedmode resonance filters crigf consisting of a grating coupler in a waveguide resonator formed by two distributed bragg reflectors of different reflectances can act as a wavelength selective reflector and an input waveguide coupler for an incident freespace wave. We present an all optically tunable wavelengthselective reflector for planar lightwave technology based on coupled microring resonators. Dispersion curves of the modal fields of the coupler in the coupling wavelength region, as a function of number of periods in the bottom reflector d s 0. Light management in luminescent solar concentrators. Osa wavelength division multiplexer based on cavity. The device is studied using an analytical model based on the transfer matrix method.
Directional coupler wavelength selective filter based on. Unidirectional and wavelengthselective photonic sphere. We propose and demonstrate a novel reconfigurable wavelength selective reflector for planar lightwave technology based on coupled microring resonators. Integration of crigfs in a waveguide is proposed to give an array of external mirrors and a.
By this way, a wavelength selective reflector can be fabricated and tuned via simple chemical route. We propose a tunable laser incorporating a cleavagefree wavelength selective reflector wsr formed by buried heterostructure bh microring resonators. Pdf multilayer wavelengthselective reflector films for lcd. This paper presents a novel narrow band wavelength selective optical reflector implemented by indirectly coupling two micro ring resonators in. Jan 15, 2020 for practical use as a wavelength selective reflector, a buffer layer under the phc slab is employed to sustain the nanorods in the phc slab. Distributed bragg reflector dbr laser holographic gratings.
Preferably, the wavelength selective reflector is a dichroic mirror. Narrowband wavelength selective thermal emitters by confined. A wavelength selective switch wss based on an array of mems mirrors tiltable in 1dimension about only one axis exhibits hitting or unwanted port connections during switching. Organic wavelength selective mirrors for luminescent solar. This reflector is suitable for use on the reflecting electrode of a liquid crystal video display panel fabricated on a semiconductor substrate.
Thus, the wavelength selective reflector functions as an antireflective layer for the emitted primary light. Osa compact wavelength selective switch using a bragg. Inline photometer with psibased dbr for wavelength. Unlike conventional tpp structures, which have a thin metal layer on a distributed bragg reflector dbr, the proposed structure has a thick metal under a dbr that is more robust for thermal radiation. Although the geometric configuration of the photonic na resembles a plasmonic yagiuda na, it has different working principles, and most importantly, reduces the inherent metallic loss from plasmonic elements. Us200201689a1 fourport wavelengthselective crossbar.
Published by unidirectional and wavelength selective photonic. Us8496339b2 transparent, wavelengthselective retroreflector. All optically tunable wavelengthselective reflector consisting of. Embodiments of the invention are directed to integrated resonance detectors and arrays of integrated resonance detectors and to methods for making and using the integrated resonance. A fourport wavelength selective crossbar switch generates an adddrop wavelength signal from a wave division multiplexed wdm signal using a plurality of doublesided reflectors that selectively reflects a selected wavelength channel signal of the wdm signal through optical circulators to provide low crosstalk between the dropped and added wavelength signals. How does fbg fiber bragg grating optical reflector work. The desired characteristics of the reflector can be obtained by using thermaloptic or electrooptic effects. Narrowband reflection and strong sidelobe suppression are demonstrated in an optical polymer device using the vernier effect. Received 15 february 1989 the modulation of the energy bands of a doping superlattice. Jul 25, 2018 the heat generated in this manner creates a tuning effect in the wavelength selective element, which can be used to offset external temperature fluctuations without the use of active cooling. The odd470w features a spectral bandwidth of 100 nm.
In a first step, we arrange two detuned distributedbraggreflectors dbr in either a sequential or in a parallel order, acting as narrowband wavelength selective cavity mirrors. Since arrays of dipoles are impractical at wavelengths o m or so, most. Download citation compact microringbased wavelengthselective inline optical reflector we present a novel design for a compact planar integrated optic reflector based on a microring resonator. Wide and simple tuning of the reflection peak using an external control beam is demonstrated. The heat generated in this manner creates a tuning effect in the wavelength selective element, which can be used to offset external temperature fluctuations without the use of active cooling. Laser diodes with distributed bragg reflector dbr 1 oscillate with extreme spectral purity at the wavelength determined by the bragg condition. Efficient phosphorconversion led structure agilent. The tuning range is about 40 nm with a maximum tuning current of 42 ma. The hyperbolic subreflector according to one embodiment is a square grid mesh with conductive rings centered along the connecting legs of the square. Lingjuan zhao, jing zhang, lu wang, yuanbing cheng, jiaoqing pan, hongbo liu, honliang zhu, fan zhou, jing bian, baojun wang, ninghua zhu, and wei wang wavelength tunable distributed bragg reflector laser integrated with electroabsorption modulator by a combined method of selective area growth and quantum well intermixing, proc. The siliconbased reflector chip consisted of a lowrefractiveindex waveguide vertically coupled to an oxideclad phc cavity. These devices deliver beams rivaling those of benchtop systems. Organic polymeric chiral nematic liquid crystalline cholesteric wavelength selective mirrors can increase the efficiency of luminescent solar concentrators lscs when they are illuminated with direct sunlight normal to the device. Wavelengthselective reflector based on a circular array of.
We have proposed a threeport high efficient channeldrop filter cdf with a coupled cavitybased wavelength selective reflector, which can be used in wavelength division multiplexing wdm optical communication systems. Its shape is part of a circular paraboloid, that is, the surface generated by a parabola revolving around its axis. Ultranarrowband wavelengthselective thermal emission with. In this paper an 8 cdf with a coupledcavity based wavelength selective reflection feedback was designed and simulated using cmt and fdtd methods. This study experimentally demonstrates infrared wavelength selective thermal emission based on tamm plasmon polaritons tpps. The device can be used as a laser endmirror, where the tunable and wavelength selective nature of the reflector can offer a stabilized yet tunable output wavelength.
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