Using the circular dichroism of a non-chiral metasurface to detect the magnetic fields

Ardakani, Abbas Ghasempour; Kamkar, Sara; Daneshmandi, Omidreza

doi:10.1016/j.jmmm.2022.169263

Cited by 3 publications

(2 citation statements)

References 27 publications

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“…The magneto-optical (MO) metasurface can provide multiple degrees of freedom for light control via magneto-optical effects, such as the Faraday effect [15][16][17] and Kerr effect [18,19] . This feature makes it widely applied in various fields such as modulator [20,21] , isolator [22][23][24] , chiral sensing [25,26] , biochemical sensing [27,28] , magnetic field sensing [29][30][31] , and MO switch [32,33] . However, in terms of the MO modulation, it is challenging to make the nanostructure achieve a strong MO response due to the weak effect of the MO material.…”

Section: Introductionmentioning

confidence: 99%

Active metasurface via magnetic control for tri-channel polarization multiplexing holography

Bi,

Huang,

et al. 2024

中国光学快报

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Active metasurfaces have recently attracted more attention since they can make the light manipulation be versatile and real-time. Metasurfaces-based holography possesses the advantages of high spatial resolution and enormous information capacity for applications in optical displays and encryption. In this work, a tunable polarization multiplexing holographic metasurface controlled by an external magnetic field is proposed. The elaborately designed nanoantennas are arranged on the magneto-optical intermediate layer, which is placed on the metallic reflecting layer. Since the non-diagonal elements of the dielectric tensor of the magneto-optical material become non-zero values once the external magnetic field is applied, the differential absorption for the left and right circularly polarized light can be generated. Meanwhile, the amplitude and phase can be flexibly modulated by changing the sizes of the nanoantennas. Based on this, the dynamic multichannel holographic display of metasurface in the linear and circular polarization channels is realized via magnetic control, and it can provide enhanced security for optical information storage. This work paves the way for the realization of magnetically controllable phase modulation, which is promising in dynamic wavefront control and optical information encryption.

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Section: Introductionmentioning

confidence: 99%

Active metasurface via magnetic control for tri-channel polarization multiplexing holography

Bi,

Huang,

et al. 2024

中国光学快报

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“…Essential in many chemical and physical phenomena and processes, the impact of external fields has attracted noticeable attention lately in the literature [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16] because it can influence the molecular structure, [17][18][19][20][21][22] chemical reactivity, [23][24][25][26][27][28] and other electronic properties. [29][30][31][32][33][34] In a previous study, we investigated the impact of uniform external electric fields on molecular acidity and aromaticity propensities for the benzoic acid molecule.…”

Section: Introductionmentioning

confidence: 99%

Directionality and additivity effects of molecular acidity and aromaticity for substituted benzoic acids under external electric fields

Li,

Wan,

Rong

et al. 2023

Phys. Chem. Chem. Phys.

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Enhanced Tunability of Dual-Band Chiral Metasurface in the Mid-Infrared Range via Slotted Nanocircuit Design

Wang,

Kuang,

et al. 2024

Nanomaterials

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Multi-band circular dichroism (CD) response and tunability on the chiral metasurface are crucial for this device’s applications in sensing and detection. This work proposes a dual-band CD Au-CaF2-Au dimer elliptical metasurface absorber, where chiroptical sensing is realized by breaking the geometric symmetry between two ellipses. The proposed metasurface can achieve high CD values of 0.8 and −0.74 for the dual-band within the 3–5 μm region, and the CD values can be manipulated by independently adjusting the geometric parameters of the metasurface. Furthermore, a slotted nanocircuit is introduced onto the metasurface to enhance its tunability by manipulating the geometry parameter in the design process, and the related mechanism is explained using an equivalent circuit model. The simulation of the sensing model revealed that the slotted nanocircuit enhances the sensor’s tunability and significantly improves its bandwidth and sensitivity, achieving peak enhancements at approximately 753 nm and 1311 nm/RIU, respectively. Due to the strong dual-band positive (and negative) responses of the CD values, flexible wavelength tunability, and nonlinear sensitivity enhancement, this design provides a new approach for the development and application of mid-infrared chiroptical devices.

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Using the circular dichroism of a non-chiral metasurface to detect the magnetic fields

Cited by 3 publications

References 27 publications

Active metasurface via magnetic control for tri-channel polarization multiplexing holography

Active metasurface via magnetic control for tri-channel polarization multiplexing holography

Directionality and additivity effects of molecular acidity and aromaticity for substituted benzoic acids under external electric fields

Enhanced Tunability of Dual-Band Chiral Metasurface in the Mid-Infrared Range via Slotted Nanocircuit Design

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