Controlling the spin-selective absorption with two-dimensional chiral plasmonic gratings

Liu, Wenxing; Mei, Liren; Li, Yunhui; Yu, Longkun; Lai, Zhenquan; Yu, Tianbao; Chen, Hong

doi:10.1364/ol.44.005868

Cited by 14 publications

(4 citation statements)

References 44 publications

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“…[ 7,8 ] The spectral position of these SLRs can be tuned by the angle of incidence, leading to the emergence of extrinsic chiral surface lattice resonances. [ 9–12 ] Strong optical activity can also result from plasmonic 3D nanostructures without mirror symmetry. However, SLRs from arrays of 3D building‐blocks with intrinsic chirality remain unexplored, but promise decreased losses and enhanced optical activity.…”

Section: Figurementioning

confidence: 99%

Chiral Surface Lattice Resonances

et al. 2020

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resonances. [5,6] A collective excitation (SLR) possesses a reduced linewidth as compared to the excitation of the LSPRs in nanoparticle ensembles. [1][2][3][4] Thus, SLRs can provide high quality-factor metasurfaces with substantial impact in nanophotonic and sensing applications. [1][2][3][4] Oblique incidence on planar metasurfaces constructed of an array of split-ring resonators showed that SLRs can also selectively respond to the handedness of circularly polarized light, causing sharp lattice-mode assisted extrinsic circular dichroism. [7,8] The spectral position of these SLRs can be tuned by the angle of incidence, leading to the emergence of extrinsic chiral surface lattice resonances. [9][10][11][12] Strong optical activity can also result from plasmonic 3D nanostructures without mirror symmetry. However, SLRs from arrays of 3D building-blocks with intrinsic chirality remain unexplored, but promise decreased losses and enhanced optical activity. [1,13] The fabrication of chiral 3D nanostructures is challenging for both, bottom-up and top-down methods. [14][15][16] Recently, the excitation of SLRs was seen in self-assembled, large area colloidal systems. [17,18] Such systems offer the possibility for fast manufacturing and covering large-areas on different substrate materials. [19] Colloid-based materials allow for embedding of nanoparticle arrays into flexible free-standing polymer films, [20] enabling the design of mechanically tunable [21] and stimuliresponsive hydrogel membranes. [22] Here, we use colloidal lithography [23][24][25] to fabricate arrays of 3D crescents with a selective response to the handedness of incident circularly polarized light, and we experimentally demonstrate handedness-dependent (chiral) SLRs at normal incidence. Colloidal lithography [23][24][25] is an experimentally simple and fast process to fabricate 3D chiral plasmonic nanostructures. [26][27][28] However, a necessary condition to observe SLRs in such nanostructure arrays is that their lattice constant must be in the range of the wavelength of the LSPRs of the individual nanostructures. [1][2][3][4] For objects with resonances in the near-infrared, such as, for example, split ring resonators, this requires large interparticle distances approaching the micrometer range. For conventional colloidal lithography processes, which depend on the controlled shrinkage of a polymer particle matrix, such distances are not easily achievable. [12,[28][29][30] Therefore, we use core-shell particles with rigid cores (silica) and soft, deformable polymer shells. [31,32] The particles selfassemble into hexagonally ordered monolayers at the air/water Collective excitation of periodic arrays of metallic nanoparticles by coupling localized surface plasmon resonances to grazing diffraction orders leads to surface lattice resonances with narrow line width. These resonances may find numerous applications in optical sensing and information processing. Here, a new degree of freedom of surface lattice resonances is experimentally investigated by dem...

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Section: Figurementioning

confidence: 99%

Chiral Surface Lattice Resonances

et al. 2020

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“…Integrating with different micro-nano optical coupling structures can lead to significant progress in miniaturized on-chip integrated photodetection. However, research into the structures mentioned above has typically been focused on the visible or near-infrared and mid-infrared spectrum [16,34,[52][53][54][55][56][57][58][59][60][61] and occasionally extends into the long-wave infrared region. In this study, an asymmetric plasmon opticalcoupling structure was used and integrated with anisotropic-quantum-well materials to achieve high-performance circular-polarization detection.…”

Section: Discussionmentioning

confidence: 99%

“…Among the potential applications, the combination of metal surface plasmon and quantum-well photoelectric detection produces many novel bright spots. With the progress in micro-nano fabrication technologies, chiral plasmonic antennas have been proposed to integrate with detection materials to form on-chip circular-polarization detectors [15,16]. These antennas are engineered to selectively couple left-handed circularly polarized (LCP) or right-handed circularly polarized (RCP) light into enhanced local fields and concurrently reflect the CPL with the opposite handedness [17][18][19][20][21][22][23].…”

Section: Introductionmentioning

confidence: 99%

Enhanced THz Circular-Polarization Detection in Miniaturized Chips with Chiral Antennas

Li,

Zhou,

Deng

et al. 2024

Photonics

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Recent advancements in terahertz (THz) wave technology have highlighted the criticality of circular-polarization detection, fostering the development of more compact, efficient on-chip THz circular-polarization detectors. In response to this technological imperative, we presented a chiral-antenna-integrated GaAs/AlGaAs quantum well (QW) THz detector. The chiral antenna selectively couples the incident light of a specific circular-polarization state into a surface-plasmon polariton wave that enhances the absorptance of the QWs by a factor of 12 relative to a standard 45° faceted device, and reflects a significant amount of the incident light of the orthogonal circular-polarization state. The circular-polarization selectivity is further enhanced by the QWs with a strong intrinsic anisotropy, resulting in a circular-polarization extinction ratio (CPER) as high as 26 at 6.52 THz. In addition, the operation band of the device can be adjusted by tuning the structural parameters of the chiral structure. Moreover, the device preserves a high performance for oblique incidence within a range of ±5°, and the device architecture is compatible with a focal plane array. This report communicates a promising approach for the development of miniaturized on-chip THz circular-polarization detectors.

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“…However, the plasmonic chiral nanostructures usually have a large absorption and radiation loss, which inevitably induces a relatively broad linewidth in their CD spectral response. For instance, the full-width at half-maximum (FWHM) in a designed branch-shaped chiral plasmonic grating structure is about 30 nm in the visible light region [16], and that for a proposed F-shaped metallic nanorods array is about 750 nm in the mid-infrared wavelength [17]. To achieve the efficient light-matter interaction for sensitive optical detection or light emission, the design of the chiral resonant structures with a high Q-factor is urgently needed.…”

Section: Introductionmentioning

confidence: 99%

Narrow-linewidth circular dichroism in asymmetric double split ring resonator metasurface

Dai,

Bi,

Chen

et al. 2023

Nanophotonics and Micro/Nano Optics IX

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Controlling the spin-selective absorption with two-dimensional chiral plasmonic gratings

Cited by 14 publications

References 44 publications

Chiral Surface Lattice Resonances

Chiral Surface Lattice Resonances

Enhanced THz Circular-Polarization Detection in Miniaturized Chips with Chiral Antennas

Narrow-linewidth circular dichroism in asymmetric double split ring resonator metasurface

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