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学者姓名：翟天瑞
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摘要 ：
Lasing properties of the two-dimensional (2D) distributed feedback (DFB) lasers can be engineered by replacing either the gain medium or periodic structures necessary for the feedback mechanism. Quasicrystals are the intermediate class between the periodic and random structures. They have high rotational symmetry and more favorable for the generation of photonic bandgap as compared to periodic structures. In our experiment, we designed a pentagonal prism for the holographic lithography to construct a long-range 10-fold rotational symmetry, which exhibits 2D quasiperiodic structures. A solution-processable colloidal quantum dots (CQDs) was spin-coated on the resultant 2D quasicrystals. An analytical model based on the cavity mode coupling effect was developed to predict the output performance of the 2D DFB CQDs photonic quasicrystals laser. The respective optically pumped 2D photonic quasicrystal samples exhibit multi-wavelength lasing emission in different directions due to long-range rotational symmetry. The five DFB lasing spots are symmetrically distributed in the 2D space, the center of the lasing spots is similar to a star shape. The derived analytical model predictions are in line with the experimental results.
关键词 ：
multi-wavelength lasing multi-wavelength lasing two-dimension distributed feedback lasing two-dimension distributed feedback lasing colloidal quantum dots colloidal quantum dots cavity mode coupling effect cavity mode coupling effect holographic lithography holographic lithography two-dimension photonic quasicrystals two-dimension photonic quasicrystals
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| GB/T 7714 | Hayat, Anwer , Zhai, Tianrui . Two-dimensional distributed feedback lasing with colloidal quantum dots in photonic quasicrystals [C] . 2021 . |
| MLA | Hayat, Anwer 等. "Two-dimensional distributed feedback lasing with colloidal quantum dots in photonic quasicrystals" . (2021) . |
| APA | Hayat, Anwer , Zhai, Tianrui . Two-dimensional distributed feedback lasing with colloidal quantum dots in photonic quasicrystals . (2021) . |
| 导入链接 | NoteExpress RIS BibTex |
摘要 ：
Lateral effect photodiodes sense the position of a laser beam by measuring the change of current between opposite anodes and a common cathode. They either require a bias current or the current is photogenerated. In either case, their linearity is affected by the non-uniformity of the current distribution between the anodes. We here propose a bias-free, lateral photo-diode, which consists of a resistive layer forming an extended Schottky contact to an intrinsic semiconductor. In our sensor, the photo-generated carriers do not diffuse laterally. Rather, their localization under the laser-beam results in a reduction of the barrier height due to image force effect. An open-circuit voltage appears between two opposite electrodes that is linear with the laser-beam position. A tetra-lateral configuration, with four anodes at the edges of a square-shaped sensor, allows sensing in two dimensions. (c) 2021 Elsevier B.V. All rights reserved.
关键词 ：
Photo-detectors Photo-detectors Position sensing Position sensing Schottky junctions Schottky junctions Image force effect Image force effect
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| GB/T 7714 | Wang, Xiaolei , Sun, Xupeng , Zhai, Tianrui et al. A bias-free, lateral effect position sensor photo-detector [J]. | SENSORS AND ACTUATORS A-PHYSICAL , 2021 , 330 . |
| MLA | Wang, Xiaolei et al. "A bias-free, lateral effect position sensor photo-detector" . | SENSORS AND ACTUATORS A-PHYSICAL 330 (2021) . |
| APA | Wang, Xiaolei , Sun, Xupeng , Zhai, Tianrui , Yang, Qianqian , Cui, Shuainan , Zhang, Jie et al. A bias-free, lateral effect position sensor photo-detector . | SENSORS AND ACTUATORS A-PHYSICAL , 2021 , 330 . |
| 导入链接 | NoteExpress RIS BibTex |
摘要 ：
The orbital angular momentum (OAM) of the structure light is viewed as a candidate for enhancing the capacity of information processing. Microring has advantages in realizing the compact lasers required for on-chip applications. However, as the clockwise and counterclockwise whispering gallery modes (WGM) appear simultaneously, the emitted light from the normal microring does not possess net OAM. Here, we propose an OAM laser based on the standing-wave WGMs containing clockwise and counterclockwise WGM components. Due to the inhomogeneous intensity distribution of the standing-wave WGM, the single-mode lasing for the OAM light can be realized. Besides, the OAM of the emitted light can be designed on demand. The principle and properties of the proposed laser are demonstrated by numerical simulations. This work paves the way for exploring a single-mode OAM laser based on the plasmonic standing-wave WGMs at the microscale, which can be served as a basic building block for on-chip optical devices.
关键词 ：
optical microcavity optical microcavity micro-nano vortex laser micro-nano vortex laser orbital angular momentum orbital angular momentum micro-nano photonics devices micro-nano photonics devices plasmonic devices plasmonic devices
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| GB/T 7714 | Wang, Xingyuan , Hu, Xiaoyong , Zhai, Tianrui . Vortex Laser Based on a Plasmonic Ring Cavity [J]. | CRYSTALS , 2021 , 11 (8) . |
| MLA | Wang, Xingyuan et al. "Vortex Laser Based on a Plasmonic Ring Cavity" . | CRYSTALS 11 . 8 (2021) . |
| APA | Wang, Xingyuan , Hu, Xiaoyong , Zhai, Tianrui . Vortex Laser Based on a Plasmonic Ring Cavity . | CRYSTALS , 2021 , 11 (8) . |
| 导入链接 | NoteExpress RIS BibTex |
摘要 ：
One of the most attractive characteristics of diluted ferromagnetic semiconductors is the possibility to modulate their electronic and ferromagnetic properties, coupled by itinerant holes through various means. A prominent example is the modification of Curie temperature and magnetic anisotropy by ion implantation and pulsed laser melting in III-V diluted magnetic semiconductors. In this study, to the best of our knowledge, we performed, for the first time, the co-doping of (In,Mn)As diluted magnetic semiconductors by Al by co-implantation subsequently combined with a pulsed laser annealing technique. Additionally, the structural and magnetic properties were systematically investigated by gradually raising the Al implantation fluence. Unexpectedly, under a well-preserved epitaxial structure, all samples presented weaken Curie temperature, magnetization, as well as uniaxial magnetic anisotropies when more aluminum was involved. Such a phenomenon is probably due to enhanced carrier localization introduced by Al or the suppression of substitutional Mn atoms.
关键词 ：
magnetic semiconductors magnetic semiconductors magnetic properties magnetic properties co-doping co-doping ion implantation ion implantation
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| GB/T 7714 | Yuan, Ye , Xie, Yufang , Yuan, Ning et al. The Al Doping Effect on Epitaxial (In,Mn)As Dilute Magnetic Semiconductors Prepared by Ion Implantation and Pulsed Laser Melting [J]. | MATERIALS , 2021 , 14 (15) . |
| MLA | Yuan, Ye et al. "The Al Doping Effect on Epitaxial (In,Mn)As Dilute Magnetic Semiconductors Prepared by Ion Implantation and Pulsed Laser Melting" . | MATERIALS 14 . 15 (2021) . |
| APA | Yuan, Ye , Xie, Yufang , Yuan, Ning , Wang, Mao , Heller, Rene , Kentsch, Ulrich et al. The Al Doping Effect on Epitaxial (In,Mn)As Dilute Magnetic Semiconductors Prepared by Ion Implantation and Pulsed Laser Melting . | MATERIALS , 2021 , 14 (15) . |
| 导入链接 | NoteExpress RIS BibTex |
摘要 ：
Hall-effect in semiconductors has wide applications for magnetic field sensing. Yet, a standard Hall sensor retains two problems: its linearity is affected by the non-uniformity of the current distribution; the sensitivity is bias-dependent, with linearity decreasing with increasing bias current. In order to improve the performance, we here propose a novel structure which realizes bias-free, photo-induced Hall sensors. The system consists of a semi-transparent metal Pt and a semiconductor Si or GaAs to form a Schottky contact. We systematically compared the photo-induced Schottky behaviors and Hall effects without net current flowing, depending on various magnetic fields, light intensities and wavelengths of Pt/GaAs and Pt/Si junctions. The electrical characteristics of the Schottky photo-diodes were fitted to obtain the barrier height as a function of light intensity. We show that the open-circuit Hall voltage of Pt/GaAs junction is orders of magnitude lower than that of Pt/Si, and the barrier height of GaAs is smaller. It should be attributed to the surface states in GaAs which block the carrier drifting. This work not only realizes the physical investigations of photo-induced Hall effects in Pt/GaAs and Pt/Si Schottky junctions, but also opens a new pathway for bias-free magnetic sensing with high linearity and sensitivity comparing to commercial Hall-sensors.
关键词 ：
barrier height barrier height magnetic sensor magnetic sensor photo-induced Hall effect photo-induced Hall effect Schottky junction Schottky junction
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| GB/T 7714 | Wang Xiaolei , Sun Xupeng , Cui Shuainan et al. Physical Investigations on Bias-Free, Photo-Induced Hall Sensors Based on Pt/GaAs and Pt/Si Schottky Junctions. [J]. | Sensors , 2021 , 21 (9) . |
| MLA | Wang Xiaolei et al. "Physical Investigations on Bias-Free, Photo-Induced Hall Sensors Based on Pt/GaAs and Pt/Si Schottky Junctions." . | Sensors 21 . 9 (2021) . |
| APA | Wang Xiaolei , Sun Xupeng , Cui Shuainan , Yang Qianqian , Zhai Tianrui , Zhao Jinliang et al. Physical Investigations on Bias-Free, Photo-Induced Hall Sensors Based on Pt/GaAs and Pt/Si Schottky Junctions. . | Sensors , 2021 , 21 (9) . |
| 导入链接 | NoteExpress RIS BibTex |
摘要 ：
Toward a higher degree of secure communication, great efforts have been made to develop encryption and anticounterfeiting strategies. In particular, optical encryption with high complexity has become one of the most significant approaches. To strengthen optical information security, the concept of a spectral encryption approach is proposed based on selectively visualized spectral modes in random lasers. By coupling with external whispering gallery mode cavity, hidden localized lasing modes with special multiple-peaks spectra are selected from phase-correlated random lasers with smooth single-peak spectra. The selectively visualized localized modes are utilized for spectral encryption of secure information. The encoded spectral modes that are hidden in phase-correlated modes with identical spectra can only be selectively recognized by a special external coupler. This multiplex encryption strategy is super for the simple operation, low cost, and high security, supplying a new approach for further applications in secure communication and anticounterfeiting.
关键词 ：
coupling coupling encryption encryption mode selection mode selection random lasers random lasers whispering gallery mode whispering gallery mode
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| GB/T 7714 | Shi, Xiaoyu , Song, Wanting , Guo, Dan et al. Selectively Visualizing the Hidden Modes in Random Lasers for Secure Communication [J]. | LASER & PHOTONICS REVIEWS , 2021 , 15 (10) . |
| MLA | Shi, Xiaoyu et al. "Selectively Visualizing the Hidden Modes in Random Lasers for Secure Communication" . | LASER & PHOTONICS REVIEWS 15 . 10 (2021) . |
| APA | Shi, Xiaoyu , Song, Wanting , Guo, Dan , Tong, Junhua , Zhai, Tianrui . Selectively Visualizing the Hidden Modes in Random Lasers for Secure Communication . | LASER & PHOTONICS REVIEWS , 2021 , 15 (10) . |
| 导入链接 | NoteExpress RIS BibTex |
摘要 ：
Topological Weyl semimetals have attracted considerable interest because they manifest underlying physics and device potential in spintronics. Large anomalous Hall effect (AHE) in non-collinear antiferromagnets (AFMs) represents a striking Weyl phase, which is associated with Bloch-band topological features. In this work, we report robust AHE and Lifshitz transition in high-quality Weyl semimetal Mn3Ge thin film, comprising stacked Kagome lattice and chiral antiferromagnetism. We successfully achieved giant AHE in our Mn3Ge film, with a strong Berry curvature enhanced by the Weyl phase. The enormous coercive field HC in our AHE curve at 5 K reached an unprecedented 5.3 T among hexagonal Mn3X systems. Our results provide direct experimental evidence of an electronic topological transition in the chiral AFMs. The temperature was demonstrated to play an efficient role in tuning the carrier concentration, which could be quantitatively determined by the two-band model. The electronic band structure crosses the Fermi energy level and leads to the reversal of carrier type around 50 K. The results not only offer new functionality for effectively modulating the Fermi level location in topological Weyl semimetals but also present a promising route of manipulating the carrier concentration in antiferromagnetic spintronic devices.
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| GB/T 7714 | Wang Xiaolei , Pan Dong , Zeng Qingqi et al. Robust anomalous Hall effect and temperature-driven Lifshitz transition in Weyl semimetal Mn3Ge. [J]. | Nanoscale , 2021 , 13 (4) : 2601-2608 . |
| MLA | Wang Xiaolei et al. "Robust anomalous Hall effect and temperature-driven Lifshitz transition in Weyl semimetal Mn3Ge." . | Nanoscale 13 . 4 (2021) : 2601-2608 . |
| APA | Wang Xiaolei , Pan Dong , Zeng Qingqi , Chen Xue , Wang Hailong , Zhao Duo et al. Robust anomalous Hall effect and temperature-driven Lifshitz transition in Weyl semimetal Mn3Ge. . | Nanoscale , 2021 , 13 (4) , 2601-2608 . |
| 导入链接 | NoteExpress RIS BibTex |
摘要 ：
A full-color whispering-gallery mode (WGM) laser has been fabricated by partitioning different light-emitting polymers in a nested microcavity. Red-green-blue WGM lasing with a high quality factor above 10(4) and a narrow linewidth of 0.025 nm emits from nested capillaries when excited with a nanosecond laser. The full-color WGM lasing shows a low excitation threshold for the nested microcavities, which can avoid fluorescence resonant energy transfer. We also achieve wavelength tunable lasing upon altering the different polymers in the nested microcavities. The work demonstrates a simple method to fabricate a full-color WGM laser and its potential applications in compact lighting devices and white laser sources.
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| GB/T 7714 | Ge, Kun , Shi, Xiaoyu , Xu, Zhiyang et al. Full-color WGM lasing in nested microcavities [J]. | NANOSCALE , 2021 , 13 (24) : 10792-10797 . |
| MLA | Ge, Kun et al. "Full-color WGM lasing in nested microcavities" . | NANOSCALE 13 . 24 (2021) : 10792-10797 . |
| APA | Ge, Kun , Shi, Xiaoyu , Xu, Zhiyang , Libin, Cui , Guo, Dan , Li, Songtao et al. Full-color WGM lasing in nested microcavities . | NANOSCALE , 2021 , 13 (24) , 10792-10797 . |
| 导入链接 | NoteExpress RIS BibTex |
摘要 ：
Single-mode plasmonic lasing has great potential for use in photonic and sensing applications. In this work, single-mode lasing is realized using a plasmonic-enhanced woven microfiber that shows ultrahigh sensitivity to the ambient environment. This plasmonic-enhanced microfiber is fabricated by spraying Ag nanospheres onto rhodamine 6G-doped polymer microfibers. Single-mode laser emission with an ultranarrow linewidth (0.1 nm) and a low threshold (18.8 kW/ mm(2)) is achieved in the microfiber using the effects of mode selection and plasmonic enhancement provided by the Ag nanospheres. A large wavelength shift in the single- limbic enhan mode lasing is observed when the proposed laser is used as a sensor and exposed to a microfiber' humid or acidic environment. The wavelength shift is attributed to refractive index Textile fiber variations in the microfiber caused by either moisture absorption or chemical reactions. In humidity sensing, the laser's sensitivity is as high as 826.6 pm/% relative humidity (RH) and the detection limit is 0.051% RH. An innovative strategy for acetic acid gas sensing is proposed that uses the chemical reaction with rhodamine 6G, and its minimum response time is 5 min. Because of the microfiber's excellent fabric compatibility, a wearable sensor is fabricated by weaving the plasmonic-enhanced microfiber into clothes, and this sensor demonstrates extreme bending stability. The results reported here provide a novel approach to the design and fabrication of ultrasensitive wearable sensors for multifunctional sensing applications.
关键词 ：
fabric compatibility fabric compatibility multifunctional sensing multifunctional sensing plasmonic microfiber plasmonic microfiber single-mode lasing single-mode lasing wearable sensor wearable sensor
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| GB/T 7714 | Zhang, Shuai , Shi, Xiaoyu , Yan, Shaoxin et al. Single-Mode Lasing in Plasmonic-Enhanced Woven Microfibers for Multifunctional Sensing [J]. | ACS SENSORS , 2021 , 6 (9) : 3416-3423 . |
| MLA | Zhang, Shuai et al. "Single-Mode Lasing in Plasmonic-Enhanced Woven Microfibers for Multifunctional Sensing" . | ACS SENSORS 6 . 9 (2021) : 3416-3423 . |
| APA | Zhang, Shuai , Shi, Xiaoyu , Yan, Shaoxin , Zhang, Xiao , Ge, Kun , Han, Chang Bao et al. Single-Mode Lasing in Plasmonic-Enhanced Woven Microfibers for Multifunctional Sensing . | ACS SENSORS , 2021 , 6 (9) , 3416-3423 . |
| 导入链接 | NoteExpress RIS BibTex |
摘要 ：
Among the efforts to improve the performances of microlasers, optimization of the gain properties and cavity parameters of these lasers has attracted significant attention recently. Distributed feedback lasers, as one of the most promising candidate technologies for electrically pumped microlasers, can be combined with dual-gratings. This combination provides additional freedom for the design of the laser cavity. Here, a holographic dual-grating is designed to improve the distributed feedback laser performance. The holographic dual-grating laser consists of a colloidal quantum dot film with two parallel gratings, comprising first-order (210 nm) and second-order (420 nm) gratings that can be fabricated easily using a combination of spin coating and interference lithography. The feedback and the output from the cavity are controlled using the first-order grating and the second-order grating, respectively. Through careful design and analysis of the dual-grating, a balance is achieved between the feedback and the cavity output such that the lasing threshold based on the dual-grating is nearly half the threshold of conventional distributed feedback lasers. Additionally, the holographic dual-grating laser shows a high level of stability because of the high stability of the colloidal quantum dots against photobleaching.
关键词 ：
dual-gratings dual-gratings holographic holographic microlasers microlasers
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| GB/T 7714 | Zhai, Tianrui , Han, Liang , Ma, Xiaojie et al. Low-Threshold Microlasers Based on Holographic Dual-Gratings [J]. | NANOMATERIALS , 2021 , 11 (6) . |
| MLA | Zhai, Tianrui et al. "Low-Threshold Microlasers Based on Holographic Dual-Gratings" . | NANOMATERIALS 11 . 6 (2021) . |
| APA | Zhai, Tianrui , Han, Liang , Ma, Xiaojie , Wang, Xiaolei . Low-Threshold Microlasers Based on Holographic Dual-Gratings . | NANOMATERIALS , 2021 , 11 (6) . |
| 导入链接 | NoteExpress RIS BibTex |
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