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Electrically-pumped compact topological bulk lasers driven by band-inverted bound states in the continuum

Light(Science & Applications) 2023年第7期12卷 1337-1345页

作者： Song Han Jieyuan Cui Yunda Chua Yongquan Zeng Liangxing Hu Mingjin Dai Fakun Wang Fangyuan Sun Song Zhu Lianhe Li alexander giles davies Edmund Harold Linfield Chuan Seng Tan Yuri kivshar Qi Jie Wang Centre for Optoelectronics and Biophotonics School of Electrical and Electronic Engineering&The Photonics InstituteNanyang Technological UniversitySingaporeSingapore Electronic Information School Wuhan UniversityWuhanChina school of Electronic and Electrical Engineering University of LeedsLeedsUK Nonlinear Physics Center Research School of PhysicsAustralian National UniversityCanberraACT 2601Australia Division of Physics and Applied Physics School of Physical and Mathematical SciencesNanyang Technological UniversitySingaporeSingapore

One of the most exciting breakthroughs in physics is the concept of topology that was recently introduced to photonics,achieving robust functionalities,as manifested in the recently demonstrated topological ***,so far almost all attention was focused on lasing from topological edge *** bands that reflect the topological bulk-edge correspondence have been largely ***,we demonstrate an electrically pumped topological bulk quantum cascade laser(QCL)operating in the terahertz(THz)frequency *** addition to the band-inversion induced in-plane reflection due to topological nontrivial cavity surrounded by a trivial domain,we further illustrate the band edges of such topological bulk lasers are recognized as the bound states in the continuum(BiCs)due to their nonradiative characteristics and robust topological polarization charges in the momentum ***,the lasing modes show both in-plane and out-of-plane tight confinements in a compact laser cavity(lateral size~3λ_(laser)).Experimentally,we realize a miniaturized THz QCL that shows single-mode lasing with a side-mode suppression ratio(SMSR)around 20 *** also observe a cylindrical vector beam for the far-field emission,which is evidence for topological bulk BIC *** demonstration on miniaturization of single-mode beam-engineered THz lasers is promising for many applications including imaging,sensing,and communications.

关键词： pumped polarization lasing

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Terahertz emission from localized modes in one-dimensional disordered systems [Invited]

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Photonics Research 2018年第2期6卷 117-122页

作者： YONGQUAN ZENG GUOZHEN LIANG Bo QIANG Bo MENG Hou KUN LIANG SHAMPY MANSHA JIANPING LI ZHAOHUI L LIANHE LI alexander giles davies EDMUND HAROLD LINFIELD YING ZHANG YIDONG CHONG AND Qi JIE WANG Centre for Optoelectronics and Biophotonics School of Electrical and Electronic Engineering Nanyang Technological University 50 Nanyang Avenue Singapore 639798 Singapore Singapore Institute of Manufacturing Technology 2 Fusionopolis Way Singapore 138634 Singapore School of Physical and Mathematical Sciences Nanyang Technological University 21 Nanyang Link Singapore 637371 Singapore Institute of Photonics Technology Jinan University Guangzhou 510632 China State Key Laboratory of Optoelectronic Materials and Technologies School of Electronics and Information Technology Sun Yat-sen University Guangzhou 510275 China School of Electronic and Electrical Engineering University of Leeds Woodhouse Lane Leeds LS2 9JT UK

We demonstrate terahertz(THz) frequency laser emission around 3.2 THz from localized modes in one-dimensional disordered grating systems. The disordered structures are patterned on top of the double-metal waveguide of a THz quantum cascade laser. Multiple emission peaks are observed within a frequency range corresponding to the bandgap of a periodic counterpart with no disorder, indicating the presence of mode localization aided by Bragg scattering. Simulations and experimental measurements provide strong evidence for the spatial localization of the THz laser modes.

关键词： (290.4210) Multiple scattering (040.2235) Far infrared or terahertz (140.5965) Semiconductor lasers, quantumcascade.

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爱丽丝梦游仙境 giles Fuchs办公室

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室内设计与装修 2015年第3期 62-67页

作者： Peldon Rose Scott alexander

Peldon Rose是英国著名的室内设计师,他的团队完成过很多优秀的办公空间设计,但恐怕很少有一件作品能比他为giles Fuchs设计的办公室更吸引眼球。这间坐落在伦敦萨瑟克区的办公室是脱离传统意义的办公空间,这里没有规整的空间布局、严... 详细信息

Peldon Rose是英国著名的室内设计师,他的团队完成过很多优秀的办公空间设计,但恐怕很少有一件作品能比他为giles Fuchs设计的办公室更吸引眼球。这间坐落在伦敦萨瑟克区的办公室是脱离传统意义的办公空间,这里没有规整的空间布局、严格的分级座次、一体化的办公家具、忙碌紧张的办公人员,你不要妄图在这里正襟危坐,

关键词： giles Fuchs 办公空间设计爱丽丝室内设计师办公家具办公人员五彩斑斓空间布局水泥森林办公椅

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