External amplitude and frequency modulation of a terahertz quantum cascade laser using metamaterial/graphene devices
文献类型：期刊论文
| 作者 | 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
 |
| 出版日期 | 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 |
| WOS记录号 | WOS:000407294200014 |
| 出版者 | NATURE PUBLISHING GROUP |
| 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. |
入库方式： OAI收割
来源：紫金山天文台
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