Electromagnetic induced transparency (EIT) [1] is a technique that offers a possibility to dynamically engineer the susceptibilities of materials, potentially allowing for large increases in the density of photonic components, as well as the development of functions of impossible implementation with existing integrated optical technologies. The increase in density is due to the order of magnitude decrease in interaction lengths and the potential ultra-low power dissipation in adiabatic structures. In this work we show a possible application of EIT in producing an extremely selective wavelength coupler filter. We next study the performance and limitations of the device with respect to the physical parameters involved.
Electromagnetic induced transparency (EIT) [1] is a technique that offers a possibility to dynamically engineer the susceptibilities of materials, potentially allowing for large increases in the density of photonic components, as well as the development of functions of impossible implementation with existing integrated optical technologies. The increase in density is due to the order of magnitude decrease in interaction lengths and the potential ultra-low power dissipation in adiabatic structures. In this work we show a possible application of EIT in producing an extremely selective wavelength coupler filter. We next study the performance and limitations of the device with respect to the physical parameters involved.
Electromagnetically induced transparency (EIT) is a phenomenon where a narrow transparency window appears within an absorption band of a material due to quantum interference. This effect has significant applications in various fields, including slow light devices, optical filters, and sensors. This paper compares three prominent EIT implementation resonator structures: single direct-coupled, double coupler add-drop, standard double resonator (SDR), coupled ring reflector (CRR) and self-coupled optical waveguide (SCOW). We analyze their underlying mechanisms, performance characteristics, and suitability for different applications, supported by recent research from 2020 onwards. We also present simulated transmission spectra, using Lumerical Interconnect, for each configuration to visually illustrate their distinct features.
All optical devices are very important for developing new optical communications systems and in photonic processing. Electromagnetic Induced Transparency (EIT) is a new optical effect and makes it possible new non linear effects in materials with interactions between three or more atomic levels. In this work, a study of this new kind of interaction in three level system media is presented. Its potential applications in devices like optical wavelength converters, optical switchers, optical memories, optical routers and optical filters, that can be implemented by means of different optical structures and materials, are also presented. These photonic devices could use low level power pumping.
Polarization-insensitive electromagnetically induced transparency (EIT) based on ultra-thin coupling planar metamaterials has been numerically demonstrated. The height (h) of ultra-thin coupling planar metamaterials can reach to 1/94 λ, which is the thinnest height so far. Such ultra-thin EIT metamaterials can reduce the cost of production. When the angles of the incident electromagnetic wave are changed, the EIT metamaterials show polarization-insensitive characteristics. When the height of the EIT metamaterials gradually increases, the group index gradually decreases and the transmission peak value and h/λ gradually increase. All of above characteristics make the ultra-thin coupling EIT have potential application in slow light devices. In addition, using the coupling of the top and below layer has proposed a way to obtain ultra-thin metamaterials in the microwave region.
Using detailed numerical simulations, and analytical theory, we study properties of micro-cavities which incorporate materials that exhibit Electro-magnetically Induced Transparency (EIT) or Ultra Slow Light (USL). We find that such systems, while being miniature in size (order wavelength), and integrable, can have some outstanding properties. In particular, they could have lifetimes orders of magnitude longer than other existing systems, and could exhibit non-linear all-optical switching at single photon power levels. Potential applications include miniature atomic clocks, and all-optical quantum information processing.
Abstract Based on graphene, an ultra-broadband electromagnetically induced transparency (EIT) window with dynamic tunability is realized in theory. Through altering the Fermi level of graphene that can be regulated by the external voltage, the EIT window and the EIT effect, especially the slow-wave effect, can be easily adjusted. Moreover, the bandwidth of the EIT window can be changed by the incidence angle, achieving the transformation from broadband to narrowband. At the same time, by discussing the polarization state and loss index, the characteristics of polarization insensitivity and low loss are proved. Additionally, the influences of other parameters are discussed, such as the relaxation time of graphene and coupling distance. These unique features enable the designed EIT metamaterial to be masterly applied to optical switches, optical modulators, and slow-light devices.
In this paper, we present a novel method based on Electromagnetically Induced Transparency (EIT) and ring resonator for description of all-optical controllable filters that is so necessary for development of all-optical networks and systems. Impurities including 4-level atoms or nanocrystals added to ring resonator for control of the absorption and the index of refraction. Parameters of the control electromagnetic field or fields are used to manipulate the absorption and the index of refraction of the ring resonator. Also, optical filtering behavior of the ring resonator is studied. It is shown that using the control field, optical filtering properties of the proposed structure can be controlled.