Quantum confinement effect induced topological phase transitions in anisotropic Weyl semimetal

Wu, Meimei; Sun, Yanmei; Zhao, Hui; Pan, Hui

doi:10.1016/j.spmi.2019.106386

Cited by 2 publications

(2 citation statements)

References 64 publications

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“…Low dimensional nanomaterials have attracted extensive attention because of their special geometric structure and application prospects as building blocks for solar cells, biosensors and photodetectors [10,11,12,13]. Silicon nanowire arrays (SiNWs) are typical representatives of new one-dimensional nanomaterials which are composed of countless silicon nanowires arranged in an orderly manner perpendicular to the substrate, showing a special "forest structure" as a whole, presenting excellent antireflection and high carrier collection efficiency owing to the transition probability of stimulated radiation of the electrons [14,15]. In addition, SiNWs also has the advantages of high surface activity and adjustable band gap which shows high-sensitive response to humidity, temperature and blowing rate in the air [16,17].…”

Section: Introductionmentioning

confidence: 99%

Simulation and analysis of the optical performance of silicon nanowire arrays

Wang,

Zhang,

Zhu

2023

J. Phys.: Conf. Ser.

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It is the basic operating principle of many optoelectronic sensors with using semiconductor materials to detect light waves for achieving efficient photoelectric conversion. At present, how to maximize the light absorption of materials in broad spectrum becomes one of the key subjects in optical sensing field. In this paper, the antireflective properties of silicon nanowire arrays is analyzed by means of the subwavelength grating principle and the effective medium theory, and the influence of structural parameters on the reflectivity of micro/nano structured arrays under broad spectrum irradiation is simulated by finite difference time domain solutions simulation software system. Theoretical calculation can get knowledge of the variation regularity of diffraction order of micro/nano films. Simulation result can provide theoretical reference for later specific experiments of realizing the morphology evolution of arrays. Combination of two steps, the appearance of higher-order diffraction light can be controlled by changing the structural parameters so as to improve the antireflective properties of micro/nano structured arrays.

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Section: Introductionmentioning

confidence: 99%

Simulation and analysis of the optical performance of silicon nanowire arrays

Wang,

Zhang,

Zhu

2023

J. Phys.: Conf. Ser.

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“…An important challenge of advanced silicon-based sensors is adjusting the band range of light absorption to expand the flexibility in detection. The quantum confinement of light excitation carriers can widen the energy band inside SiNWs and improve the transition probability of stimulated radiation of the electrons [ 4 , 5 ]. Therefore, the energy band structure of nanomaterials shows the obvious size dependence.…”

Section: Introductionmentioning

confidence: 99%

Effect of Surface Morphology Changes on Optical Properties of Silicon Nanowire Arrays

Wang

Huang

Zhao

2022

Sensors

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The optical properties of silicon nanowire arrays (SiNWs) are closely related to surface morphology due to quantum effects and quantum confinement effects of the existing semiconductor nanocrystal. In order to explore the influence of the diameters and distribution density of nanowires on the light absorption in the visible to near infrared band, we report the highly efficient method of multiple replication of versatile homogeneous Au films from porous anodic aluminum oxide (AAO) membranes by ion sputtering as etching catalysts; the monocrystalline silicon is etched along the growth templates in a fixed proportion chemical solution to form homogeneous ordered arrays of different morphology and distributions on the surface. In this system, we demonstrate that the synthesized nanostructure arrays can be tuned to exhibit different optical characteristics in the test wavelength range by adjusting the structural parameters of AAO membranes.

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Quantum confinement effect induced topological phase transitions in anisotropic Weyl semimetal

Cited by 2 publications

References 64 publications

Simulation and analysis of the optical performance of silicon nanowire arrays

Simulation and analysis of the optical performance of silicon nanowire arrays

Effect of Surface Morphology Changes on Optical Properties of Silicon Nanowire Arrays

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