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

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Abstract

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.

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DOI:10.1364/prj.6.000117

基金项目:Ministry of Education—Singapore (MOE)10.13039/501100001459 (MOE 2016-T2-1-128); Agency for Science, Technology and Research (A*STAR)10.13039/501100001348 (1426500050); National Research Foundation Singapore (NRF)10.13039/501100001381 (NRF-CRP18-2017-02); Engineering and Physical Sciences Research Council (EPSRC)10.13039/501100000266 (EP/P021859/1); Royal Society10.13039/501100000288 and Wolfson Foundation10.13039/501100001320.

收稿日期:2017-11-03

录用日期:2017-12-10

网络出版日期:2017-12-11

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Yongquan Zeng:Centre for Optoelectronics and Biophotonics, School of Electrical and Electronic Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, Singapore
Guozhen Liang:Centre for Optoelectronics and Biophotonics, School of Electrical and Electronic Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, Singapore
Bo Qiang:Centre for Optoelectronics and Biophotonics, School of Electrical and Electronic Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, Singapore
Bo Meng:Centre for Optoelectronics and Biophotonics, School of Electrical and Electronic Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, Singapore
Hou Kun Liang:Singapore Institute of Manufacturing Technology, 2 Fusionopolis Way, Singapore 138634, Singapore
Shampy Mansha:School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, Singapore 637371, Singapore
Jianping Li:Institute of Photonics Technology, Jinan University, Guangzhou 510632, China
Zhaohui Li:State Key Laboratory of Optoelectronic Materials and Technologies, School of Electronics and Information Technology, Sun Yat-sen University, Guangzhou 510275, China
Lianhe Li:School of Electronic and Electrical Engineering, University of Leeds, Woodhouse Lane, Leeds LS2 9JT, UK
Alexander Giles Davies:School of Electronic and Electrical Engineering, University of Leeds, Woodhouse Lane, Leeds LS2 9JT, UK
Edmund Harold Linfield:School of Electronic and Electrical Engineering, University of Leeds, Woodhouse Lane, Leeds LS2 9JT, UK
Ying Zhang:Singapore Institute of Manufacturing Technology, 2 Fusionopolis Way, Singapore 138634, Singapore
Yidong Chong:School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, Singapore 637371, Singapore
Qi Jie Wang:Centre for Optoelectronics and Biophotonics, School of Electrical and Electronic Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, SingaporeSchool of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, Singapore 637371, Singapore

联系人作者:Qi Jie Wang(qjwang@ntu.edu.sg)

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引用该论文

Yongquan Zeng, Guozhen Liang, Bo Qiang, Bo Meng, Hou Kun Liang, Shampy Mansha, Jianping Li, Zhaohui Li, Lianhe Li, Alexander Giles Davies, Edmund Harold Linfield, Ying Zhang, Yidong Chong, and Qi Jie Wang, "Terahertz emission from localized modes in one-dimensional disordered systems [Invited]," Photonics Research 6(2), 117-122 (2018)

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