Nonreciprocal transmission of electromagnetic waves by three-layer magneto-optical mediums

Yu, Guanxia; Fu, Jingjing; Du, Wenwen; Lv, Yihang; Luo, Min

doi:10.1088/1674-1056/28/2/024101

Cited by 8 publications

(3 citation statements)

References 24 publications

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“…Taken as an example, the quasi-periodic layout is a typical means to enhance nonreciprocity. [13,14] On the other hand, magnetized gyromagnetic photonic crystals (MGPCs), [15][16][17] kinds of PCs with the introduction of magnetized magneto-optical materials, are capable of realizing time-reversal asymmetry and bringing about nonreciprocal properties. With appropriate structures in the MGPCs, the band gap effects will help to promote nonreciprocity.…”

Section: Introductionmentioning

confidence: 99%

Nonreciprocal wide-angle bidirectional absorber based on one-dimensional magnetized gyromagnetic photonic crystals

Liu

Shi²,

Wan³

et al. 2023

Chinese Phys. B

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The magnetized gyromagnetic photonic crystals (MGPCs), composed of the indium antimonide (InSb) and Yttrium iron garnet ferrite (YIGF) layers, are proposed, which possess the properties of the nonreciprocal wide-angle bidirectional absorption. The periodical defects in the MGPCs work as filters. The absorption bands (ABs) for the positive and the negative propagation arise from the optical Tamm state and resonance in the cavities respectively, and they prove to share no overlaps in the study frequency range. Given ω 0=2.0138 THz, for the positive propagation, the ABs in the high-frequency range are localized in the interval between 0.66ω 0 and 0.88ω 0. In the angular range, the ABs for the TE and TM waves reach 60° and 51°, separately. For the negative propagation, the ABs in the low-frequency range are localized in the interval between 0.13ω 0 and 0.3ω 0. The ABs extend to 60° for the TE waves and 80.4° for the TM waves. There also exists a narrow frequency band in a lower frequency range. The relevant factors, which include the external temperature, the magnetic fields applied to the YIGF, the refractive index of the impedance matching layer, and the defect thickness, are adjusted to investigate the effects on the ABs. All the numerical simulations are based on the transfer matrix method. This work provides an approach to the design of the isolators and so on.

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Section: Introductionmentioning

confidence: 99%

Nonreciprocal wide-angle bidirectional absorber based on one-dimensional magnetized gyromagnetic photonic crystals

Liu

Shi²,

Wan³

et al. 2023

Chinese Phys. B

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“…[10] Various nonreciprocal phenomena have been intensively investigated, including nonreciprocal transmission and amplification, [11][12][13][14][15][16] nonreciprocal (unconventional) photon blockade, [17][18][19][20] nonreciprocal signal routing, [21][22][23] and nonreciprocal quantum entanglement, [24][25][26] etc. The strategies for realization of nonreciprocity cover magneto-optical materials in conjunction with a magnetic field, [27,28] time modulation of the optical properties, [29] optical nonlinearity, [13,30,31] and synthetic magnetism, [32] etc. In addition, nonreciprocity based on a new paradigm referred to as "chiral quantum optics" has been investigated, where the nonreciprocal behavior is controllable by the spin state of the QE.…”

Section: Introductionmentioning

confidence: 99%

Nonreciprocal two-photon transmission and statistics in a chiral waveguide QED system

et al. 2022

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We study the nonreciprocal properties of transmitted photons in the chiral waveguide QED system, including single- and two-photon transmissions and second-order correlations. For the single-photon transmission, the nonreciprocity is induced by the effects of chiral coupling and atomic dissipation in the weak coupling region. It vanishes in the strong coupling regime when the effect of atomic dissipation becomes ignorable. In the case of two-photon transmission, there exist two ways of going through the emitter: independently as plane waves and formation of bound state. Besides the nonreciprocal behavior of plane waves, the bound state that differs in two directions also alters transmission probabilities. In addition, the second-order correlation of transmitted photons depends on the interference between plane wave and bound state. The destructive interference leads to the strong antibunching in the weak coupling region, while the effective formation of bound state leads to the strong bunching in the intermediate coupling region. However, the negligible interactions for left-propagating photons hardly change the statistics of the input coherent state.

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“…根据光学非对称传输设备的工作原理, 可以分为非互易光学非对称传输设备和互易光学非对称传输设备两种类型. 非互易的光学非对称传输设备通过破坏时间反对称性(破坏洛伦兹互易性)来工作, 这需要光学非线性或磁光效应 [17,19,20] . 相比之下, 互易的光学非对称传输设备破坏了空间反对称性 [21−30] , 通过光的衍射进行非对称传输.…”

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Design of asymmetric transmission of photonic crystal heterostructure based on two-dimensional hexagonal boron nitride material

et al. 2021

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Two-dimensional (2D) hexagonal boron nitride (hBN) possesses many unique properties such as high mechanical strength and excellent chemical and thermal stability. The 2D hBN exhibits a wide bandgap in the UV region and optically-stable ultra-bright quantum emitters that make hBN a promising nanophotonic platform for quantum computing and information processing, especially in the visible wavelength range. Therefore, it is greatly important to build up different nanophotonic devices with different functionalities based on this material platform to achieve the integrated photonic chips. Among the devices, the integratable optical asymmetric transmission devices are important elements for functional quantum computing chips. Since hBN is a dielectric material, photonic crystal (PhC) structure is the most suitable in principle and allows on-chip integration with other photonic devices. In this study, we theoretically design an asymmetric transmission device based on 2D hBN PhC heterostructures in the visible wavelength range for the first time. Due to the relatively low refractive index of 2D hBN material (n < 2.4), we design a free-standing hBN PhC heterostructure to maximize the light trapping in the structure and minimize the propagation loss. The asymmetric transmission device is composed of two square-lattice 2D PhC structures, namely PhC 1 and PhC 2. We use the plane wave expansion method (PWM) to calculate the iso-frequency contours (EFCs) of the PhC structures to study the light propagation inside of the PhCs, which will propagate along the gradient of direction of the EFCs. We design the PhC structure in the way that the incident light beams from different angles can be self-collimated along the Г-X direction of the PhC 2 and coupled out. On the other hand, the backward incident light is blocked by the bandgaps of PhC 2. In this way, asymmetric optical transmission is achieved with high forward transmittance and contrast ratio. In addition, we further finely tune the structural parameters, including the lattice constant and column radius of the PhCs to optimize the performance by using the finite difference time domain (FDTD) method. The resulting 2D hBN PhC heterostructure achieves an asymmetric transmission in a wavelength range of 610–684 nm with a peak forward transmittance of 0.65 at a wavelength of 652 nm. Meanwhile, the backward transmittance is controlled to be 0.04. As a result, the contrast ratio can reach up to 0.95. The working bandwidth of the hBN PhC is 74 nm (TF > 0.5). In addition, the designed asymmetric transmission device has a small size of 11 μm × 11 μm, thus it is suitable for on-chip integration. Our results open up possibilities for designing new nanophotonic devices based on 2D hBN material for quantum computing and information processing. The design principle can be generally used to design other photonic devices based on 2D hBN material.

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Nonreciprocal transmission of electromagnetic waves by three-layer magneto-optical mediums

Cited by 8 publications

References 24 publications

Nonreciprocal wide-angle bidirectional absorber based on one-dimensional magnetized gyromagnetic photonic crystals

Nonreciprocal wide-angle bidirectional absorber based on one-dimensional magnetized gyromagnetic photonic crystals

Nonreciprocal two-photon transmission and statistics in a chiral waveguide QED system

Design of asymmetric transmission of photonic crystal heterostructure based on two-dimensional hexagonal boron nitride material

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