Actively manipulating the temperature characteristics of photonic spin Hall effect in quasi-PT symmetric structure

Song, Yifei; Liu, Jing; Jiang, Ting; Zhang, Yong; Luo, Zhaoming

doi:10.1016/j.optcom.2023.130186

Cited by 2 publications

(2 citation statements)

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“…We then move to investigate the forward and backward reflected spin shifts in several asymmetric structures, such as, 3 and (AB) 3 -(BA) 7 -CCBB-(AB) 7 -(BA) 3 structures. We plot the reflected spin shifts for both the forward and backward incidences in the (AB) 7 -(BA) 7 -BB, (AB) 3 -(BA) 7 -(AB) 7 -(BA) 2 , (AB) 3 -(BA) 7 -CBCB-(AB) 7 -(BA) 3 and (AB) 3 -(BA) 7 -CCBB-(AB) 7 -(BA) 3 structures in figures 3(d)-(g), respectively. We find that unlike the obtained results in the symmetric structures, the curves of ( )…”

Section: Resultsmentioning

confidence: 99%

“…The photonic spin Hall effect (PSHE) describes the phenomenon in which the left and right-handed circularly polarized components of the linearly polarized light are separated from each other and thus form a small displacement under the refractive index gradient, which is perpendicular to the plane of incidence [1][2][3][4]. Since the PSHE is extremely sensitive to changes in structural parameters, it has been widely used in optical devices, such as biosensing, optical image processing, and precision measurement of optical parameters [5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

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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