One-way rotating state of multi-periodicity frequency bands in circular photonic crystal

Hou, Tao; Ge, Rui; Tan, Wei; Liu, Jianjun

doi:10.1088/1361-6463/ab59f4

Cited by 25 publications

(13 citation statements)

References 57 publications

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“…Concurrently, it lays a solid foundation for the wide application of micronano structures such as in solar absorption, [1][2][3][4] photonic crystal, [5][6][7] optical waveguides, [8,9] electrode material, [10,11] photocatalysis, [12][13][14][15][16] and other applications. [17][18][19][20][21][22] Generally, the designed micro-nano structures have a very attractive application prospect in the optical field due to their ability to control the diffraction and propagation of light to a certain extent.…”

Section: Introductionmentioning

confidence: 99%

Ultra wide sensing range plasmonic refractive index sensor based on nano-array with rhombus particles*

Zhu¹,

Wang²,

Wu³

et al. 2020

Chinese Phys. B

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We propose a two-dimensional metal grating with rhombus particles on a gold film structure for refractive index sensing due to its perfect absorption at near-infrared wavelength. Via two-dimensional metal grating coupling, the incident light energy is effectively transformed into the surface plasmons which propagate along the upper surface of the gold film and interact with the surrounding environment in a wide range. The plasmonic resonance mechanism of the structure is discussed in detail by theoretical analysis and finite-difference time-domain method. After optimizing the geometrical parameters, the designed structure shows the sensing performance with a refractive index sensitivity of 1006 nm/RIU. More importantly, this plasmonic refractive index sensor achieves an ultra wide refractive index sensing range from 1.0 to 2.4 with a stable sensing performance. The promising simulation results of the structure show that the sensor has a broad application prospect in the field of biology and chemistry.

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Section: Introductionmentioning

confidence: 99%

Ultra wide sensing range plasmonic refractive index sensor based on nano-array with rhombus particles*

Zhu¹,

Wang²,

Wu³

et al. 2020

Chinese Phys. B

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“…[9,10] Subsequently, some researchers used this method to design a mass of PC unidirectional waveguides and related devices. [11][12][13][14][15][16][17][18][19][20][21][22][23] However, the magnetic materials in the magneto-optical PC have large volume with the considerable absorption loss, which are mainly applied to the microwave frequency band; thus, researchers put their eyes on the dielectric materials. In 2015, Wu and Hu [24] realized the photonic quantum spin Hall effect (PQSHE) attributed to spin-orbit coupling protection that preserved TR symmetry using a 2D honeycomb lattice dielectric PC composed of a C 6v symmetric honeycomb unit cell.…”

mentioning

confidence: 99%

Variation of Topological Edge States of 2D Honeycomb Lattice Photonic Crystals

Peng

Yan

Xie

et al. 2020

Physica Rapid Research Ltrs

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Herein, the photonic quantum spin Hall effect is realized in a dielectric 2D honeycomb lattice photonic crystal (PC) with scatterers having various shapes, by stretching and shrinking the honeycomb unit cell. The topological edge states and their unidirectional transmission as scatterers with triangular, pentagonal, and heptagonal shapes are studied. The unidirectional transmission in an inverted Ω‐shaped waveguide, when different types of defects are incorporated, is realized to verify the characteristics of the topological protection. Moreover, flat band can be realized by varying the shape of several scatterers near the combined junction of PCs with different topological states, and the variation trend of flat band is evaluated with the increase in the edge number of varied scatterers from four to seven at different times. Moreover, a slow‐light waveguide is designed to further demonstrate the influence of the shape of scatterers on topological edge states for light transmission. Furthermore, the novel optical phenomenon of static state is realized; that is, light is not able to transmit but is trapped at the original position. This can increase the adjustability of the topological edge states and provide more potential applications for integrated photonic devices.

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“…Photonic topological insulators and their topological states have provided new materials and new approaches to control the propagation of light. Topological edge state (TES) [9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26][27][28] and topological corner state (TCS) [29][30][31][32][33][34][35][36] have been generated based on topological phases transition. The optical waveguide based on TES (i.e., TES waveguide), without backscattering and immune fabrication errors [9][10][11][12], has been applied to splitters [17], logic gates [18,21] and lasers [24,25], which significantly improved device performance.…”

Section: Introductionmentioning

confidence: 99%

Coupled cavity-waveguide based on topological corner state and edge state

Shi

Yan

et al. 2021

Opt. Lett.

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Topological corner state (TCS) and topological edge state (TES) have provided new approaches to control the propagation of light. The construction of topological coupled cavity-waveguide system (TCCWS) based on TCS and TES is worth looking forward to, due to its research prospects in realizing high-performance micro-nano integrated photonic devices. In this Letter, TCCWS is proposed in two-dimensional (2D) photonic crystal (PC), which possesses strong optical localization, high quality factor and excellent robustness compared with the conventional coupled cavity-waveguide system (CCCWS). This work will provide the possibility to design high-performance logic gates, lasers, filters and other micro-nano integrated photonics devices and expand their applications.

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One-way rotating state of multi-periodicity frequency bands in circular photonic crystal

Cited by 25 publications

References 57 publications

Ultra wide sensing range plasmonic refractive index sensor based on nano-array with rhombus particles*

Ultra wide sensing range plasmonic refractive index sensor based on nano-array with rhombus particles*

Variation of Topological Edge States of 2D Honeycomb Lattice Photonic Crystals

Coupled cavity-waveguide based on topological corner state and edge state

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