External amplitude and frequency modulation of a terahertz quantum cascade laser using metamaterial/graphene devices

doi:10.1038/s41598-017-07943-w

	External amplitude and frequency modulation of a terahertz quantum cascade laser using metamaterial/graphene devices
	Kindness, S. J.1; Jessop, D. S.1; Wei, B.1; Wallis, R.1; Kamboj, V. S.1; Xiao, L.1; Ren, Y.1,3; Braeuninger-Weimer, P.2; Aria, A. I.2,4; Hofmann, S.2
刊名	SCIENTIFIC REPORTS
	2017-08-09
卷号	7 页码:10
ISSN号	2045-2322
DOI	10.1038/s41598-017-07943-w
通讯作者	Kindness, S. J.(sjk80@cam.ac.uk)
英文摘要	Active control of the amplitude and frequency of terahertz sources is an essential prerequisite for exploiting a myriad of terahertz applications in imaging, spectroscopy, and communications. Here we present a optoelectronic, external modulation technique applied to a terahertz quantum cascade laser which holds the promise of addressing a number of important challenges in this research area. A hybrid metamaterial/graphene device is implemented into an external cavity set-up allowing for optoelectronic tuning of feedback into a quantum cascade laser. We demonstrate powerful, all-electronic, control over the amplitude and frequency of the laser output. Full laser switching is performed by electrostatic gating of the metamaterial/graphene device, demonstrating a modulation depth of 100%. External control of the emission spectrum is also achieved, highlighting the flexibility of this feedback method. By taking advantage of the frequency dispersive reflectivity of the metamaterial array, different modes of the QCL output are selectively suppressed using lithographic tuning and single mode operation of the multi-mode laser is enforced. Side mode suppression is electrically modulated from similar to 6 dB to similar to 21 dB, demonstrating active, optoelectronic modulation of the laser frequency content between multi-mode and single mode operation.
WOS关键词	LOADED PLASMONIC ANTENNAS ; SPLIT-RING RESONATORS ; ACTIVE-MODE LOCKING ; GRAPHENE ; CAVITY ; WAVE
WOS研究方向	Science & Technology - Other Topics
语种	英语
出版者	NATURE PUBLISHING GROUP
WOS记录号	WOS:000407294200014
内容类型	期刊论文
源URL	[http://libir.pmo.ac.cn/handle/332002/22619]
专题	中国科学院紫金山天文台
通讯作者	Kindness, S. J.
作者单位	1.Univ Cambridge, Cavendish Lab, JJ Thomson Ave, Cambridge CB3 0HE, England 2.Univ Cambridge, Dept Engn, 9 JJ Thomson Ave, Cambridge CB3 0FA, England 3.Chinese Acad Sci, Purple Mt Observ, 2 West Beijing Rd, Nanjing 210008, Jiangsu, Peoples R China 4.Cranfield Univ, Sch Aerosp Transport & Mfg, Coll Rd, Cranfield MK43 0AL, Beds, England
推荐引用方式 GB/T 7714	Kindness, S. J.,Jessop, D. S.,Wei, B.,et al. External amplitude and frequency modulation of a terahertz quantum cascade laser using metamaterial/graphene devices[J]. SCIENTIFIC REPORTS,2017,7:10.
APA	Kindness, S. J..,Jessop, D. S..,Wei, B..,Wallis, R..,Kamboj, V. S..,...&Degl'Innocenti, R..(2017).External amplitude and frequency modulation of a terahertz quantum cascade laser using metamaterial/graphene devices.SCIENTIFIC REPORTS,7,10.
MLA	Kindness, S. J.,et al."External amplitude and frequency modulation of a terahertz quantum cascade laser using metamaterial/graphene devices".SCIENTIFIC REPORTS 7(2017):10.