Tunable NIR absorption in a Ge2Sb2Te5-based 1D asymmetric nonlinear hybrid nanostructure

Rashidi, Shiva; Rashidi, Arezou; Entezar, Samad Roshan

doi:10.1016/j.optlastec.2022.108664

Cited by 8 publications

(4 citation statements)

References 52 publications

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“…It is obvious that the defect state mode is excited because of the defected (AB) N C(BA) N structure. 65,66…”

Section: Resultsmentioning

confidence: 99%

“…It is obvious that the defect state mode is excited because of the defected (AB) N C(BA) N structure. 65,66 Considered that the OTS mode and defect state mode can be excited in the respective D(AB) N and (AB) N C(BA) N structures, it is expected that their combination may enable the simultaneous excitation of the OTS mode and defect state mode. Interestingly, from Fig.…”

Section: Resultsmentioning

confidence: 99%

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Coexistence of giant Goos–Hänchen shift and high reflectance in Dirac semimetal based multilayered structure

Yin,

Liu,

Zhang

et al. 2024

Phys. Chem. Chem. Phys.

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“…It is obvious that the defect state mode is excited because of the defected (AB) N C(BA) N structure. 65,66…”

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Coexistence of giant Goos–Hänchen shift and high reflectance in Dirac semimetal based multilayered structure

Yin,

Liu,

Zhang

et al. 2024

Phys. Chem. Chem. Phys.

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“…For example, Fang et al demonstrated the nonreciprocal absorption in a metamaterial slab arranged by the inclined metal layers, this structure enables total absorption along one direction and total transmittance along the opposite propagation direction, showcasing its potential in stealth technology [32]. In addition, Rashidi et al combined the phase-change material, Ge 2 Sb 2 Te 5 (GST) and a 1DPC to achieve the different absorption along two opposite propagation directions, whose maximum difference between two opposite directions may reach up to 0.5 [33]. Shi et al proved that a magnetized ferrite photonic crystal has the nonreciprocal GH shift and it can be modulated by the angle of incidence, which offers new insights for the design of the directional dependent angle sensors [34].…”

Section: Introductionmentioning

confidence: 99%

Giant and nonreciprocal photonic spin Hall effect in asymmetric multilayered structure with bulk Dirac semimetal

Liu,

Zhang,

Yin

et al. 2024

Phys. Scr.

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The nonreciprocal photonic spin Hall effect features the different reflected or transmitted spin shifts along two opposite incident wave propagating directions. However, previous investigations have always focused on the features of the photonic spin Hall effect along one incident wave propagating direction. How to achieve the nonreciprocal photonic spin Hall effect remains obscure. Here, we theoretically study the nonreciprocal photonic spin Hall effect in the asymmetric multilayered structure containing the Bulk Dirac Semimetal and other dielectric materials. It is found that under the horizontal polarization the maximum reflected spin shift value along one direction is up to around − 14.4 times of the incident wavelength at 70.88 ° , but it is only 0.46 times of the incident wavelength at 73.2 ° along the other direction, which reflects the nonreciprocity of photonic spin Hall effect and thus can act as the photonic spin Hall diode. Such a sizeable directional difference between the reflected spin shifts along these two opposite directions originates from the fact that this structure loses its mirror symmetry and becomes an asymmetrical one, and the obvious difference in the values of the reflected spin shifts along the two directions can be attributed to the large difference in the values of ∣ r s / r p ∣ . At the same time, we find that the Fermi energy of the Bulk Dirac Semimetal can effectively tune the spin shift along the backward direction, as well as the difference between the spin shifts for two different propagating directions, which causes the controllable nonreciprocal photonic spin Hall effect. Our results establish the alternative configuration for realizing the nonreciprocal photonic spin Hall effect, which facilitates the potential applications in the spin photonic devices.

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“…They have been also pioneered for the realization of optical fast switching applications [18]. The most studied nonlinear optical switching elements are periodic structures with ability of supporting nonlinear phenomena such as bi(multi) stability and nonreciprocity, which are basis for designing optical diodes, isolators, optical transistors, and so on [19][20][21][22][23][24][25][26]. An inherent issue in these structures is the substantial input intensities required for exciting the nonlinear properties which hinders utilizing them in standard practical applications.…”

Section: Introductionmentioning

confidence: 99%

Design of an agile optical switcher based on a 1D silver plasmonic nanograting filled with a nonlinear Kerr material

Rashidi

Hatef

2023

Phys. Scr.

Self Cite

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In this paper, we investigate the nonlinear optical response characteristics of a metallic nanograting with nonlinear Kerr media within its slits using the finite element method. The proposed nanograting system is illuminated by a nanosecond Gaussian pulse laser under normal incidence and the electric filed pointing across the slits. The results show a perfect linear absorption at resonance wavelength thanks to the coupling of the surface plasmon resonance (SPR) mode and photon cavity mode. We simulate the transient nonlinear absorption variation of the system when the pulse laser is set up at either resonance or off-resonance wavelengths. The results indicate that the unit linear absorption drastically decreases by increasing the laser fluence around the center of the pulse. Interestingly, one can also enhance the weak linear off-resonance absorption to the value of unit by increasing the pulse laser fluence. The higher the laser fluence, the higher the maximum absorption contrast between linear and nonlinear regimes occurs owing to the nonlinear Kerr effect. Indeed, when the laser fluence reaches a critical value, it can excite the Kerr nonlinearity, which changes the coupling strength of SPR mode and the photon cavity mode leading to the absorption adjustment in the nanograting. These properties indicate the possibility of utilizing the proposed nanograting in dual functional absorber and nonabsorber systems, which make it an appropriate candidate for agile optical switching devices.

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Tunable NIR absorption in a Ge2Sb2Te5-based 1D asymmetric nonlinear hybrid nanostructure

Cited by 8 publications

References 52 publications

Coexistence of giant Goos–Hänchen shift and high reflectance in Dirac semimetal based multilayered structure

Coexistence of giant Goos–Hänchen shift and high reflectance in Dirac semimetal based multilayered structure

Giant and nonreciprocal photonic spin Hall effect in asymmetric multilayered structure with bulk Dirac semimetal

Design of an agile optical switcher based on a 1D silver plasmonic nanograting filled with a nonlinear Kerr material

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