Properties of metal–insulator–metal waveguide loop reflector*

Long, Hu; Zeng, Xuanke; Cai, Yi; Lu, Xiaowei; Chen, Hongyi; Xu, Shixiang; Li, Jingzhen

doi:10.1088/1674-1056/ab38a3

Cited by 4 publications

(2 citation statements)

References 23 publications

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“…[27][28][29][30][31][32] On the other hand, waveguides and cavities are two key device structures in many important engineering areas, people have presented many investigations on them. [33][34][35][36][37][38] Though the transverse spin and the related topics in two-dimensional (2D) optical waveguides have been studied, [27,39] it is not clear whether electromagnetic waves inside a 3D waveguide also possess the transverse spin. In particular, the physical origin of the transverse spin still remains obscure.…”

Section: Introductionmentioning

confidence: 99%

Theoretical research on the transverse spin of structured optical fields inside a waveguide

Wang

Wang²,

Li³

et al. 2023

Chinese Phys. B

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Structured optical fields inside a waveguide possess the transverse spin, i.e., the spin angular momentum perpendicular to the direction of the waveguide. The physical origin of the transverse spin can be attributed to the presence of an effective rest mass of photons in guided waves, or equivalently, to the existence of a longitudinal field component, such that the transverse and longitudinal fields together form an elliptical polarization plane. In contrary to the traditional viewpoint, the transverse spin of photons in guided waves is also quantized, and its quantization form is related to the ellipticity of the polarization ellipse. The direction of the transverse spin depends on the propagation direction of electromagnetic waves along the waveguide, such a spin-momentum locking may have important applications in spin-dependent unidirectional optical interfaces. By means of a coupling between the transverse spin of guided waves and some physical degrees of freedom, one can develop an optical analogy of spintronics, i.e., spinoptics.

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Section: Introductionmentioning

confidence: 99%

Theoretical research on the transverse spin of structured optical fields inside a waveguide

Wang

Wang²,

Li³

et al. 2023

Chinese Phys. B

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“…and developed into integrated devices and even relatively large-scale integrated circuits [ 2 ]. The development of optical devices (lasers [ 3 , 4 , 5 ], amplifiers [ 6 ], modulators [ 7 ], filters [ 8 ], waveguide circuits [ 9 ], switches, detectors, etc.) will go through a similar process.…”

Section: Introductionmentioning

confidence: 99%

Femtosecond Laser Direct Writing of Optical Overpass

et al. 2022

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With the rapid increase in information density, problems such as signal crosstalk and crossover restrict the further expansion of chip integration levels and packaging density. Based on this, a novel waveguide structure—photonic jumper wire—is proposed here to break through the technical restrictions in waveguide crossing and parallel line wrapping, which hinder the integration of photonic chips. Furthermore, we fabricated the optical overpass to realize a more complex on-chip optical cross-connection. Our method and structure promote a series of practical schemes for improving optical chip integration.

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Enhanced circular dichroism of TDBC in a metallic hole array structure*

He¹,

Ye²,

Song³

2020

Chinese Phys. B

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We investigate the enhanced chirality of chiral molecular J-aggregates (TDBC) by the propagating surface plasmons (PSPs) in the metallic hole array structure filled with TDBC. The two ends of the hole in the metal film form a low quality factor Fabry–Perot (FP) cavity, and this cavity confines PSPs. The resonant wavelength of the metallic hole array is tuned by the lattice constant and the size of the hole. Both the resonant wavelength of Ag hole array and the volume ratio of TDBC in the hybridized structure influence on the enhancement of the circular dichroism (CD) spectrum. The curve of CD spectrum shows Fano-like line-shape, due to the interaction between the non-radiative field in the FP cavity and the radiative field in chiral TDBC. The maximum of the CD spectrum of the hybridized structure is 0.025 times as the one of the extinction spectrum in a certain structure, while the maximum of the CD spectrum of TDBC is 1/3000 times as the one of the extinction spectrum. The enhanced factor is about 75. The resonant wavelength of the metallic hole array can be tuned in a large wavelength regime, and the chirality of a series of molecular J-aggregates with different resonant wavelengths can be enhanced. Our structure provides a new method to amplify the chirality of molecular J-aggregates in experiments.

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Properties of metal–insulator–metal waveguide loop reflector*

Cited by 4 publications

References 23 publications

Theoretical research on the transverse spin of structured optical fields inside a waveguide

Theoretical research on the transverse spin of structured optical fields inside a waveguide

Femtosecond Laser Direct Writing of Optical Overpass

Enhanced circular dichroism of TDBC in a metallic hole array structure*

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