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学者姓名:赖云锋

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< Page ,Total 16 >
Ultracompact and Polarization-Independent On-Chip Mode Exchangers Enabled by Subwavelength Grating Metamaterials SCIE
期刊论文 | 2025 , 43 (1) , 308-316 | JOURNAL OF LIGHTWAVE TECHNOLOGY
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Abstract :

Different from conventional mode-order converters, the mode exchangers (EXCij), enabling flexible data exchanging between i-th-mode and j-th-mode, are essential building blocks for passive signal switching, signal routing, and high-capacity mode division multiplexing (MDM) networks. However, mode changers are limited by the strong polarization-dependence, especially on the 220-nm-thick silicon-on-insulator (SOI) platform. In this paper, an ultracompact and polarization-independent EXC01 and EXC02 are proposed to overcome this limitation by using MZI-like models. Here, subwavelength grating (SWG) metamaterials are introduced to the input/output Y-branches for mode splitting/combining and one arm for phase shifting. As such, a pi phase difference is formed by the SWG-manipulated phase shifter and then the modes guided in branches are combined into the required output modes. The characterizations show low insertion losses (<1.6 dB) and crosstalk (<-15 dB) over bandwidths of 31 nm and 49 nm, for EXC01 and EXC02, respectively. For footprints, EXC01/EXC02 has ultracompact size of 13.42 x 1.704/2.044 x 8.434 mu m(2). For the first time, a polarization-independent mode change between 0-th-mode (0-th-mode) and 1-th-mode (2-th-mode) are achieved and can be applied in in flexible MDM systems, signal routing, passive signal switching and beyond.

Keyword :

Bandwidth Bandwidth Integrated optical devices Integrated optical devices Metamaterials Metamaterials mode change mode change mode division multiplexing mode division multiplexing mode-order converters mode-order converters multimode photonics multimode photonics Optical sensors Optical sensors Phase shifters Phase shifters Photonics Photonics Refractive index Refractive index Silicon Silicon

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GB/T 7714 Guo, Zhenzhao , Wu, Shengbao , Lai, Yunfeng et al. Ultracompact and Polarization-Independent On-Chip Mode Exchangers Enabled by Subwavelength Grating Metamaterials [J]. | JOURNAL OF LIGHTWAVE TECHNOLOGY , 2025 , 43 (1) : 308-316 .
MLA Guo, Zhenzhao et al. "Ultracompact and Polarization-Independent On-Chip Mode Exchangers Enabled by Subwavelength Grating Metamaterials" . | JOURNAL OF LIGHTWAVE TECHNOLOGY 43 . 1 (2025) : 308-316 .
APA Guo, Zhenzhao , Wu, Shengbao , Lai, Yunfeng , Cheng, Shuying . Ultracompact and Polarization-Independent On-Chip Mode Exchangers Enabled by Subwavelength Grating Metamaterials . | JOURNAL OF LIGHTWAVE TECHNOLOGY , 2025 , 43 (1) , 308-316 .
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Dual-Band Topological Valley Cavity in Mid-Infrared Range EI
期刊论文 | 2025 , 12 (5) | Photonics
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Topological edge states, emerging at boundaries between regions with distinct topological properties, enable unidirectional transmission with robustness against defects and disorder. However, achieving dual-band operation with high performance remains challenging. Here, we integrate dual-band topological edge states into a valley photonic crystal cavity operating in the mid-infrared region, leveraging triangular scatterers. A key contribution of this work is the simultaneous realization of ultra-high Q-factors (up to 6.1593 × 109) and uniform mode distribution (inverse participation ratio © 2025 by the authors.

Keyword :

Inverse problems Inverse problems Photonic integrated circuits Photonic integrated circuits Q factor measurement Q factor measurement

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GB/T 7714 Kang, Chen , Yu, Jinling , Chen, Can et al. Dual-Band Topological Valley Cavity in Mid-Infrared Range [J]. | Photonics , 2025 , 12 (5) .
MLA Kang, Chen et al. "Dual-Band Topological Valley Cavity in Mid-Infrared Range" . | Photonics 12 . 5 (2025) .
APA Kang, Chen , Yu, Jinling , Chen, Can , Lai, Yunfeng , Cheng, Shuying , Chen, Yonghai et al. Dual-Band Topological Valley Cavity in Mid-Infrared Range . | Photonics , 2025 , 12 (5) .
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Manipulation of Helicity-Dependent Photocurrent and Stokes Parameter Detection in Topological Insulator Bi2Te3 Nanowires SCIE
期刊论文 | 2024 , 16 (30) , 40297-40308 | ACS APPLIED MATERIALS & INTERFACES
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Abstract :

Helicity-dependent photocurrent (HDPC) and its modulation in topological insulator Bi2Te3 nanowires have been investigated. It is revealed that when the incident plane of a laser is perpendicular to the nanowire, the HDPC is an odd function of the incident angle, which is mainly contributed by the circular photogalvanic effect originating from the surface states of Bi2Te3 nanowire. When the incident plane of a laser is parallel to the nanowire, the HDPC is approximately an even function of the incident angle, which is due to the circular photon drag effect coming from the surface states. It is found that the HDPC can be effectively tuned by the back gate and the ionic liquid top gate. By analyzing the substrate dependence of the HDPC, we find that the HDPC of the Bi2Te3 nanowire on the Si substrate is an order of magnitude larger than that on SiO2, which may be due to the spin injection from the Si substrate to the Bi2Te3 nanowire. In addition, by applying different biases, the Stokes parameters of a polarized light can be extracted by arithmetic operation of the photocurrents measured in the Bi2Te3 nanowire. This work suggests that topological insulator Bi2Te3 nanowires may provide a good platform for opto-spintronic devices, especially in chirality and polarimtry detection.

Keyword :

Bi2Te3 Nanowires Bi2Te3 Nanowires Helicity DependentPhotocurrent Helicity DependentPhotocurrent Ionic Liquid Gating Ionic Liquid Gating Stokes ParameterDetection Stokes ParameterDetection Substrates Substrates

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GB/T 7714 Yu, Qin , Feng, Shizun , Yu, Jinling et al. Manipulation of Helicity-Dependent Photocurrent and Stokes Parameter Detection in Topological Insulator Bi2Te3 Nanowires [J]. | ACS APPLIED MATERIALS & INTERFACES , 2024 , 16 (30) : 40297-40308 .
MLA Yu, Qin et al. "Manipulation of Helicity-Dependent Photocurrent and Stokes Parameter Detection in Topological Insulator Bi2Te3 Nanowires" . | ACS APPLIED MATERIALS & INTERFACES 16 . 30 (2024) : 40297-40308 .
APA Yu, Qin , Feng, Shizun , Yu, Jinling , Cheng, Shuying , Lai, Yunfeng , Chen, Yonghai et al. Manipulation of Helicity-Dependent Photocurrent and Stokes Parameter Detection in Topological Insulator Bi2Te3 Nanowires . | ACS APPLIED MATERIALS & INTERFACES , 2024 , 16 (30) , 40297-40308 .
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Chiral optical modulation of Si-Ge2Sb2Te5 2 Sb 2 Te 5 composite metasurfaces driven by quasi-bound states in the continuum SCIE
期刊论文 | 2024 , 63 (29) , 7682-7691 | APPLIED OPTICS
WoS CC Cited Count: 1
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Chiral metasurfaces with high quality factors (Q-factors) are a promising platform for achieving chiral optical responses. However, the optical properties of most metasurfaces are fixed once they are fabricated. Here, we study the effect of phase-change material Ge2Sb2Te5 (GST) on the chiral optics of a planar chiral Si metasurface driven by bound states in the continuum (BICs), as the refractive index of the phase-change material changes before and after the phase change. The planar chiral silicon metasurface is capable of generating near-unity (0.99) circular dichroism and giant (0.996) linear dichroism in the infrared region. Notably, phase-change material GST is integrated into the Z-shaped Si metasurfaces. We actively tune the dissipative loss by causing the GST to undergo a phase transition, thereby modulating the optical chirality. In addition, we numerically simulate the effect of the thickness of the phase-change layer and the embedded position on the optical response. Compared with single-functional metasurfaces, this device exhibits better flexibility and more functionalities. It is demonstrated that the optical chirality of the metasurface can be well controlled using the phase-change material GST. (c) 2024 Optica Publishing Group. All rights, including for text and data mining (TDM), Artificial Intelligence (AI) training, and similar technologies, are reserved.

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GB/T 7714 Chen, Can , Yu, Jinling , Kang, Chen et al. Chiral optical modulation of Si-Ge2Sb2Te5 2 Sb 2 Te 5 composite metasurfaces driven by quasi-bound states in the continuum [J]. | APPLIED OPTICS , 2024 , 63 (29) : 7682-7691 .
MLA Chen, Can et al. "Chiral optical modulation of Si-Ge2Sb2Te5 2 Sb 2 Te 5 composite metasurfaces driven by quasi-bound states in the continuum" . | APPLIED OPTICS 63 . 29 (2024) : 7682-7691 .
APA Chen, Can , Yu, Jinling , Kang, Chen , Chen, Yonghai , Lai, Yunfeng , Cheng, Shuying . Chiral optical modulation of Si-Ge2Sb2Te5 2 Sb 2 Te 5 composite metasurfaces driven by quasi-bound states in the continuum . | APPLIED OPTICS , 2024 , 63 (29) , 7682-7691 .
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Investigation of helicity-dependent photocurrent of surface states in (BiSb)Te nanoplate CSCD
期刊论文 | 2024 , 33 (5) | Chinese Physics B
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Helicity-dependent photocurrent (HDPC) of the surface states in a high-quality topological insulator (Bi0.7Sb0.3)2Te3 nanoplate grown by chemical vapor deposition (CVD) is investigated. By investigating the angle-dependent HDPC, it is found that the HDPC is mainly contributed by the circular photogalvanic effect (CPGE) current when the incident plane is perpendicular to the connection of the two contacts, whereas the circular photon drag effect (CPDE) dominates the HDPC when the incident plane is parallel to the connection of the two contacts. In addition, the CPGE of the (Bi0.7Sb0.3)2Te3 nanoplate is regulated by temperature, light power, excitation wavelength, the source–drain and ionic liquid top-gate voltages, and the regulation mechanisms are discussed. It is demonstrated that (Bi0.7Sb0.3)2Te3 nanoplates may provide a good platform for novel opto-spintronics devices.

Keyword :

(BiSb)Te nanoplate (BiSb)Te nanoplate circular photogalvanic effect circular photogalvanic effect helicity-dependent photocurrent helicity-dependent photocurrent ionic liquid gating ionic liquid gating

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GB/T 7714 Qin Yu , Jinling Yu , Yonghai Chen et al. Investigation of helicity-dependent photocurrent of surface states in (BiSb)Te nanoplate [J]. | Chinese Physics B , 2024 , 33 (5) .
MLA Qin Yu et al. "Investigation of helicity-dependent photocurrent of surface states in (BiSb)Te nanoplate" . | Chinese Physics B 33 . 5 (2024) .
APA Qin Yu , Jinling Yu , Yonghai Chen , Yunfeng Lai , Shuying Cheng , Ke He . Investigation of helicity-dependent photocurrent of surface states in (BiSb)Te nanoplate . | Chinese Physics B , 2024 , 33 (5) .
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Investigation of helicity-dependent photocurrent of surface states in (Bi0.7Sb0.3)2Te3 nanoplate SCIE
期刊论文 | 2024 , 33 (5) | CHINESE PHYSICS B
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Abstract :

Helicity-dependent photocurrent (HDPC) of the surface states in a high-quality topological insulator (Bi0.7Sb0.3)(2)Te-3 nanoplate grown by chemical vapor deposition (CVD) is investigated. By investigating the angle-dependent HDPC, it is found that the HDPC is mainly contributed by the circular photogalvanic effect (CPGE) current when the incident plane is perpendicular to the connection of the two contacts, whereas the circular photon drag effect (CPDE) dominates the HDPC when the incident plane is parallel to the connection of the two contacts. In addition, the CPGE of the (Bi0.7Sb0.3)(2)Te-3 nanoplate is regulated by temperature, light power, excitation wavelength, the source-drain and ionic liquid top-gate voltages, and the regulation mechanisms are discussed. It is demonstrated that (Bi0.7Sb0.3)(2)Te-3 nanoplates may provide a good platform for novel opto-spintronics devices.

Keyword :

(Bi0.7Sb0.3)(2)Te-3 nanoplate (Bi0.7Sb0.3)(2)Te-3 nanoplate circular photogalvanic effect circular photogalvanic effect helicity-dependent photocurrent helicity-dependent photocurrent ionic liquid gating ionic liquid gating

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GB/T 7714 Yu, Qin , Yu, Jinling , Chen, Yonghai et al. Investigation of helicity-dependent photocurrent of surface states in (Bi0.7Sb0.3)2Te3 nanoplate [J]. | CHINESE PHYSICS B , 2024 , 33 (5) .
MLA Yu, Qin et al. "Investigation of helicity-dependent photocurrent of surface states in (Bi0.7Sb0.3)2Te3 nanoplate" . | CHINESE PHYSICS B 33 . 5 (2024) .
APA Yu, Qin , Yu, Jinling , Chen, Yonghai , Lai, Yunfeng , Cheng, Shuying , He, Ke . Investigation of helicity-dependent photocurrent of surface states in (Bi0.7Sb0.3)2Te3 nanoplate . | CHINESE PHYSICS B , 2024 , 33 (5) .
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Investigation of Interface-Induced Helicity-Dependent Photocurrent and High-T C Ferromagnetism in Wafer-Scale 2D Ferromagnetic Fe4GeTe2/Bi2Te3 Heterostructures SCIE
期刊论文 | 2024 , 16 (49) , 68542-68552 | ACS APPLIED MATERIALS & INTERFACES
WoS CC Cited Count: 1
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Abstract :

The helicity-dependent photocurrent (HDPC) of Fe4GeTe2 (3, 5, 8, 10 nm)/Bi2Te3 (8 nm) heterostructures grown on sapphire substrates was systematically investigated. It is revealed that the HDPC is induced by the interface coupling between the Fe4GeTe2 and Bi2Te3 films, and it is dominated by the circular photogalvanic effect (CPGE) rather than by the circular photodrag effect (circular photon drag effect). As the tensile strain increases, the CPGE current decreases, which can be attributed to the decrease of the interface-induced spin-orbit coupling with increasing tensile strain. In addition, it is demonstrated that by applying appropriate tensile strain, the 5 nm Fe4GeTe2/Bi2Te3 sample can be used to detect the circular polarization state of a light. Finally, Fe4GeTe2 (5, 8, and 10 nm)/Bi2Te3 (8 nm) heterostructures show a T-C larger than 390 K. The dependence of the CPGE on the film thickness of Fe4GeTe2 is different from that of Curie temperature, indicating that the enhanced exchange interaction induced by the interface coupling may be the dominant mechanism for the high-T-C ferromagnetism. The large interface-induced CPGE in the Fe4GeTe2/Bi2Te3 suggests that Fe4GeTe2/Bi2Te3 heterostructures may provide a good platform for designing novel opto-spintronic devices.

Keyword :

2D ferromagnetic Fe4GeTe2/Bi2Te3 heterostructures 2D ferromagnetic Fe4GeTe2/Bi2Te3 heterostructures circular photogalvaniceffect circular photogalvaniceffect circular polarization detection circular polarization detection ferromagnetism ferromagnetism interface-induced helicity-dependentphotocurrent interface-induced helicity-dependentphotocurrent strain strain

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GB/T 7714 Lin, Zongkai , Zhao, Runyu , Yu, Jinling et al. Investigation of Interface-Induced Helicity-Dependent Photocurrent and High-T C Ferromagnetism in Wafer-Scale 2D Ferromagnetic Fe4GeTe2/Bi2Te3 Heterostructures [J]. | ACS APPLIED MATERIALS & INTERFACES , 2024 , 16 (49) : 68542-68552 .
MLA Lin, Zongkai et al. "Investigation of Interface-Induced Helicity-Dependent Photocurrent and High-T C Ferromagnetism in Wafer-Scale 2D Ferromagnetic Fe4GeTe2/Bi2Te3 Heterostructures" . | ACS APPLIED MATERIALS & INTERFACES 16 . 49 (2024) : 68542-68552 .
APA Lin, Zongkai , Zhao, Runyu , Yu, Jinling , Li, Qiang , Xie, Weiran , Lai, Yunfeng et al. Investigation of Interface-Induced Helicity-Dependent Photocurrent and High-T C Ferromagnetism in Wafer-Scale 2D Ferromagnetic Fe4GeTe2/Bi2Te3 Heterostructures . | ACS APPLIED MATERIALS & INTERFACES , 2024 , 16 (49) , 68542-68552 .
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Compact, Scalable and Flexible Multi-Mode-Converting Model Employing Subwavelength Gratings SCIE
期刊论文 | 2024 , 42 (20) , 7267-7281 | JOURNAL OF LIGHTWAVE TECHNOLOGY
WoS CC Cited Count: 4
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Orthogonal eigenmodes in multimode waveguides are an indispensable physical dimension for enhancing the capacity of optical communications, and efficient mode converters are therefore of vital functional significance. However, the conventional single-pair mode conversion in a single device is having difficulty meeting the ever-increasing demand for optical capacity. By contrast, the multi-pair mode converter can improve the multiplexing capacity and be further applied in spatial-mode-oriented passive signal switching and permutation cipher. Here, a scalable multi-mode converting model, combing the multimode interference and beam shaping by exploiting subwavelength metamaterials, is firstly reported to enable simultaneous multi-spatial-mode manipulation and break its polarization-dependency limit. Based on this model, five proof-of-concept converters are designed, realizing polarization-independent, and multi-mode conversions, or a combination of both within compact lengths (< 17.436 mu m). For the first time, TE0/TM0-to-TE2/TM2, TE0/TE1/TE2-to-TE2/TE3/ TE4, TE0/TE1/TM0/TM1-to-TE2/TE3/TM2/TM3, and TE0/TE1-to-TE1/TE2 converters are reported and experimentally demonstrated, covering a double/triple/quadruple-mode manipulation in a single device. From measurements, these converters exhibit low insertion losses (0.72 to 1.65 dB) and intermodal crosstalks (-30.26 to -12.19 dB) at 1550 nm, and have a 56-nm/30-nm bandwidth of loss < 1.4 dB/1.9 dB and crosstalk < -13 dB/-10.5 dB, for the best/worst case. The proposed multi-mode converting model can manipulate multiple input modes in parallel and beak the polarization-dependency limit for multi-spatial-mode conversion, which holds great potential for spatial-mode-oriented nanophotonic systems.

Keyword :

Integrated optical devices Integrated optical devices mode division (de)multiplexing mode division (de)multiplexing mode-order converter mode-order converter

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GB/T 7714 Guo, Zhenzhao , Xiao, Jinbiao , Wu, Shengbao et al. Compact, Scalable and Flexible Multi-Mode-Converting Model Employing Subwavelength Gratings [J]. | JOURNAL OF LIGHTWAVE TECHNOLOGY , 2024 , 42 (20) : 7267-7281 .
MLA Guo, Zhenzhao et al. "Compact, Scalable and Flexible Multi-Mode-Converting Model Employing Subwavelength Gratings" . | JOURNAL OF LIGHTWAVE TECHNOLOGY 42 . 20 (2024) : 7267-7281 .
APA Guo, Zhenzhao , Xiao, Jinbiao , Wu, Shengbao , Lai, Yunfeng , Cheng, Shuying . Compact, Scalable and Flexible Multi-Mode-Converting Model Employing Subwavelength Gratings . | JOURNAL OF LIGHTWAVE TECHNOLOGY , 2024 , 42 (20) , 7267-7281 .
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Upconversion luminescence enhancement of NaGdF4:Er3+/Yb3+/Al3+nanorods through tuning Al2O3 layer in a hybrid photonic-plasmonic-dielectric structure SCIE
期刊论文 | 2023 , 137 | OPTICAL MATERIALS
WoS CC Cited Count: 2
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Surface plasmon resonance and photonic crystals (PCs) effect are effective methods for improving upconversion luminescence (UCL) for upconversion nanoparticles. In this work, PCs/Ag/Al2O3/UC hybrid structure is pre-sented to enhance UCL of NaGdF4:Er3+/Yb3+/Al3+ nanorods through tuning the thickness of the Al2O3 layer. The optical and luminescence properties were studied and compared with those of UC and PCs/Ag/UC hybrid, it is shown that the thickness of Al2O3 layer has a significant effect on fluorescence intensity, outstanding upcon-version luminescence enhancement and the green-to-red intensity ratios have been achieved at 980 nm excita-tion. The maximum enhancement factors of the red and green emission were obtained for the sample with 10 nm Al2O3 layer, respectively. The mechanism of UCL enhancement for PCs/Ag/Al2O3/UC hybrid structure was discussed.

Keyword :

Ag Ag Dielectric confinement Dielectric confinement Energy transfer Energy transfer Local field enhancement Local field enhancement PCs PCs UC hybrid UC hybrid Upconversion enhancement Upconversion enhancement

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GB/T 7714 Zhou, Haifang , Zou, Jiaxin , Weng, Xuehua et al. Upconversion luminescence enhancement of NaGdF4:Er3+/Yb3+/Al3+nanorods through tuning Al2O3 layer in a hybrid photonic-plasmonic-dielectric structure [J]. | OPTICAL MATERIALS , 2023 , 137 .
MLA Zhou, Haifang et al. "Upconversion luminescence enhancement of NaGdF4:Er3+/Yb3+/Al3+nanorods through tuning Al2O3 layer in a hybrid photonic-plasmonic-dielectric structure" . | OPTICAL MATERIALS 137 (2023) .
APA Zhou, Haifang , Zou, Jiaxin , Weng, Xuehua , Lai, Yunfeng , Yu, Jinling . Upconversion luminescence enhancement of NaGdF4:Er3+/Yb3+/Al3+nanorods through tuning Al2O3 layer in a hybrid photonic-plasmonic-dielectric structure . | OPTICAL MATERIALS , 2023 , 137 .
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Spatial distribution of photo-induced anomalous Hall effects of the top and bottom surface states in topological insulators Sb2Te3 SCIE
期刊论文 | 2023 , 150 | PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES
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Three-dimensional (3D) topological insulators (TIs) have attracted much attention due to their topologically protected surface states. Here, we use circularly polarized light to induce the photo-induced anomalous Hall effect (PAHE) in 3D TIs Sb2Te3 thin films with different thicknesses of 5, 7, 12 and 20 quintuple layers (QLs) at room temperature. The dependence of PAHE current on the light spot locations of Sb2Te3 thin films is investigated, which is found to show a completely different behavior from that observed in two-dimensional electron gas (2DEG) systems. This is due to the fact that the total PAHE current is the superposition of the PAHE of the top and bottom surface states. A theoretical model has been proposed to separate the PAHE current of the top and bottom surface states. In addition, as the thickness of the Sb2Te3 film increases from 5 QL to 20 QL, the PAHE currents of the top and bottom surface states first increase and then decrease. The photo-induced anomalous Hall, conductivity of the top surface states in the 7-QL Sb2Te3 film excited by 1064 nm light is as large as 592 nA & BULL; V-1 & BULL; cm & BULL; W-1, which is much larger than that observed in InGaAs/AlGaAs quantum wells (4.45 nA & BULL; V-1 & BULL; cm & BULL; W-1) and GaN/AlGaN heterostructures (1.43 nA & BULL; V-1 & BULL; cm & BULL; W-1). The giant PAHE value observed in Sb2Te3 films suggests that 3D TIs may provide a good platform for spintronic devices.

Keyword :

Photo-induced anomalous Hall effects Photo-induced anomalous Hall effects Sb2Te3 Sb2Te3 Spatial distribution Spatial distribution Top and bottom surface states Top and bottom surface states Topological insulators Topological insulators

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GB/T 7714 Lang, Xinjie , Yu, Jinling , Hong, Xiyu et al. Spatial distribution of photo-induced anomalous Hall effects of the top and bottom surface states in topological insulators Sb2Te3 [J]. | PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES , 2023 , 150 .
MLA Lang, Xinjie et al. "Spatial distribution of photo-induced anomalous Hall effects of the top and bottom surface states in topological insulators Sb2Te3" . | PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES 150 (2023) .
APA Lang, Xinjie , Yu, Jinling , Hong, Xiyu , Chen, Yonghai , Cheng, Shuying , Lai, Yunfeng et al. Spatial distribution of photo-induced anomalous Hall effects of the top and bottom surface states in topological insulators Sb2Te3 . | PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES , 2023 , 150 .
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