scispace - formally typeset
Journal ArticleDOI: 10.1063/5.0041461

The asymmetric optical bistability based on the one-dimensional photonic crystals composed of the defect layers containing the magnetized ferrite and nonlinear Kerr dielectric under the transverse electric polarization

04 Mar 2021-Journal of Applied Physics (AIP Publishing LLCAIP Publishing)-Vol. 129, Iss: 9, pp 093104
Abstract: Utilizing the modified transfer matrix method, under transverse electric polarization, asymmetric optical bistability is achieved by designing one-dimensional photonic crystals (PCs) with two Bragg reflector segments containing traditional dielectrics and asymmetric defect multilayers consisting of a magnetized ferrite and nonlinear Kerr dielectric. When the incident wave frequency equals the resonance frequency, owing to the breaking of symmetry in the defect layers and the Voigt magneto-optical effect generating in the magnetized ferrite layers together with the Kerr effect existing in the Kerr dielectric layers, the asymmetric optical modulations are presented as the bistable state in the forward propagation and the multistable state in the backward propagation. Also, the diverse energy localization distributions of the electric field in the proposed PCs from the two incident directions are graphically illustrated. Furthermore, the optical bistable switch-up and switch-down thresholds of the proposed resonator can be tailored flexibly by the external magnetic field, the incident angle, the thicknesses of different dielectrics, and the nonlinear coefficient of Kerr dielectric. This work provides a constructive proposal for the design of light modulators, such as the optical isolator, the optical triode, the all-optical diode, and the sensor.

... read more

Topics: Kerr effect (64%), Optical bistability (60%), Polarization density (58%) ... read more

5 results found

Journal ArticleDOI: 10.1016/J.IJLEO.2021.167163
Hao Ni1, Juntao Wang1, Ai-Xia Wu1Institutions (1)
01 Sep 2021-Optik
Abstract: A theoretical study in the optical bistability of the transmitted light in complex multilayers is provided. The proposal structure is composed of graphene and one-dimensional Thue-Morse dielectric lattices. Low thresholds optical bistability is achieved owning to the enhancement of graphene nonlinearity with a strong electric field localization. Simulations show that the thresholds of optical bistability and the intervals between the upper and lower thresholds can be flexibly modulated by the chemical potential of graphene, incident wavelengths and incident angles. The complex structure provides a candidate for the all-optical switches.

... read more

Topics: Optical bistability (71%), Graphene (52%), Dielectric (50%)

5 Citations

Journal ArticleDOI: 10.1364/JOSAB.431024
Lan-Lan Xu1, Ting Liu1, Ya-Xian Fan1, Huan Liu2  +1 moreInstitutions (2)
Abstract: We propose a magnetically switchable terahertz (THz) mode selector based on four transverse mode resonances in corrugated waveguides. The theoretical and numerical results show that two passbands can be obtained in the transmission spectra around the resonance points. The passband of 0.9611–1.0006 THz outputs a single second-order transverse mode with the highest ratio of 99.03% while the passband of 0.8712–0.9111 THz contains the multiple transverse mode output with the first two modes. A tunable THz mode selector with frequency band of 0.5572–0.5926 THz is realized by filling the waveguide core with a liquid crystal (E7). The widest working frequency range of the mode selector reaches 28.4 GHz when the molecular steering angle θ lies between 71.22° and 90°.

... read more

Topics: Transverse mode (57%), Terahertz radiation (53%), Passband (53%) ... read more

1 Citations

Open accessJournal ArticleDOI: 10.1364/AO.436170
Samad Roshan Entezar1Institutions (1)
20 Sep 2021-Applied Optics
Abstract: We investigate the nonlinear absorption properties of a defective one-dimensional photonic crystal at the near-infrared range using the nonlinear transfer matrix method. The defect is a nanocomposite layer containing vanadium dioxide nanoparticles sandwiched between two nonlinear dielectric layers. The linear absorption spectrum of the designed structure has three resonant absorption lines at the bandgap region of the photonic crystal. We can reconfigure the structure in the linear regime from nearly transparent to absorbent or vice versa in multiple resonant wavelengths by adjusting the temperature. Moreover, the system shows absorptive bistability by adjusting the intensity and incident angle of the input light. We discuss the tunability of the nonlinear absorption in detail. In the nonlinear regime, we show that, besides the temperature, the structure can be reconfigured from absorbent to transparent and vice versa by adjusting the incident optical power and the incident angle. We validate the results by examining the electric field distribution throughout the structure.

... read more

Journal ArticleDOI: 10.1016/J.OPTMAT.2021.111583
Tianming Li1, Chengping Yin1, Feng WuInstitutions (1)
01 Nov 2021-Optical Materials
Abstract: Optical non-reciprocity possesses a broad range of applications in the design of optical diodes, insulators, circulators, and logical devices. A conventional method to realize optical non-reciprocity is to break the Lorentz reciprocity by introducing magneto-optical materials. However, the realization of strong optical non-reciprocity based on magneto-optical materials usually requires strong external magnetic field, which poses a challenge to observe strong optical non-reciprocity in experiments. Recently, a kind of bulk topological materials called Weyl semimetals attracted researchers’ great interest since they possess the intrinsic Lorentz non-reciprocity. In this paper, we introduce a Weyl semimetals-based layer as a defect into a one-dimensional photonic crystal to achieve strong optical non-reciprocity without applying an external magnetic field. A theoretical model based on the transfer matrix method is proposed to calculate the transmittance for the forward and backward incidences of the structure. By optimizing the parameters, the wavelength difference between two defect modes for the forward and backward incidences in the proposed structure reaches 107 nm, which is two orders higher than that in a one-dimensional photonic crystal containing a InSb-based defect under a 1 T external magnetic field. This strong optical non-reciprocity in simple 1D structure would possess applications in the design of compact passive non-reciprocal devices.

... read more


38 results found

Journal ArticleDOI: 10.1063/1.1332823
Abstract: We study the effect of two-photon absorption and Kerr nonlinearity on the optical properties of a one-dimensional photonic crystal made with amorphous silicon and SiO2. A stop band appearing near 1.5 μm is monitored with a weak probe beam and modulated by changes in the refractive index caused by a pump pulse at 1.71 μm with 18 GW/cm2 peak intensity. Nonlinear optical characterization of the sample using Z-scan points out to two-photon absorption as the main contributor to free carrier excitation in silicon at that power level. Modulation in the transmittance near the band edge is found to be dominated by the optical Kerr effect within the pulse overlap (∼400 fs) whereas free carrier index changes are observed for 12 ps.

... read more

Topics: Self-phase modulation (67%), Silicon photonics (63%), Kerr effect (60%) ... read more

197 Citations

Journal ArticleDOI: 10.1063/1.3360296
02 Apr 2010-Physics of Plasmas
Abstract: Properties of obliquely incident electromagnetic wave in one-dimensional (1D) magnetized plasma photonic crystals (PPCs) are studied in this paper. Based on the continuous boundary condition of electromagnetic wave in 1D PPC, transfer matrix equation and dispersion equation of transverse magnetic polarization are deduced, and the properties of dispersion and transmission relation in terms of external magnetic field, collision frequency, and dielectric constant of dielectric and incident angles are investigated, respectively. Results show that gap location and gap width can be effectively controlled by adjusting external magnetic field as well as incident angle, and increasing collision frequency has little effect on gap width while larger dielectric constant of dielectric leads to more gaps.

... read more

Topics: Electromagnetic electron wave (63%), Electromagnetic radiation (57%), Dielectric (57%) ... read more

155 Citations

Journal ArticleDOI: 10.1038/NPHOTON.2014.45
01 Apr 2014-Nature Photonics
Abstract: An optical memory is demonstrated in a kagome photonic crystal fibre whose 26-μm-diameter hollow core is loaded with cesium atoms. Gigahertz-bandwidth light is stored using a far-detuned Raman interaction. It has a memory efficiency is 27 ± 1% and a signal-to-noise ratio of 2.6:1 — the highest at the single-photon level of any memory at room temperature.

... read more

Topics: Slow light (50%)

146 Citations

Journal ArticleDOI: 10.1016/S0030-4018(01)01531-0
D Lusk1, Ibrahim Abdulhalim1, Frank Placido1Institutions (1)
Abstract: It is shown that omnidirectional reflection (ODR) is possible from quasi-periodic isotropic dielectric stacks following a Fibonacci sequence (FS). The transition from truly periodic to fully quasi-periodic structure is investigated by building periodic structures having unit cells made of FS of order j. The number of periods required to achieve ODR decreases as j increases until only a single period is required at which the structure is fully quasi-periodic. As compared to the periodic case, for the quasi-periodic structure the spectral range is wider, the thickness of the single layers is smaller and the tolerance on the layer thicknesses is smaller.

... read more

133 Citations

Open accessJournal ArticleDOI: 10.1103/PHYSREVE.74.046603
05 Oct 2006-Physical Review E
Abstract: We analyze the resonant linear and nonlinear transmission through a photonic crystal waveguide sidecoupled to a Kerr-nonlinear photonic crystal resonator. First, we extend the standard coupled-mode theory analysis to photonic crystal structures and obtain explicit analytical expressions for the bistability thresholds and transmission coefficients which provide the basis for a detailed understanding of the possibilities associated with these structures. Next, we discuss limitations of standard coupled-mode theory and present an alternative analytical approach based on the effective discrete equations derived using a Green’s function method. We find that the discrete nature of the photonic crystal waveguides allows a geometry-driven enhancement of nonlinear effects by shifting the resonator location relative to the waveguide, thus providing an additional control of resonant waveguide transmission and Fano resonances. We further demonstrate that this enhancement may result in the lowering of the bistability threshold and switching power of nonlinear devices by several orders of magnitude. Finally, we show that employing such enhancements is of paramount importance for the design of all-optical devices based on slow-light photonic crystal waveguides.

... read more

Topics: Photonic crystal (61%), Resonator (56%), Bistability (55%) ... read more

85 Citations

No. of citations received by the Paper in previous years