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PMO OpenIR  > 毫米波和亚毫米波技术实验室  > 期刊论文
题名: External amplitude and frequency modulation of a terahertz quantum cascade laser using metamaterial/graphene devices
作者: Kindness, S. J.; Jessop, D. S.; Wei, B.; Wallis, R.; Kamboj, V. S.; Xiao, L.; Ren, Y.; Braeuninger-Weimer, P.; Aria, A. I.; Hofmann, S.; Beere, H. E.; Ritchie, D. A.; Degl'Innocenti, R.
刊名: SCIENTIFIC REPORTS
出版日期: 2017
卷号: 7, 页码:7657-
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.
语种: 英语
内容类型: 期刊论文
URI标识: http://libir.pmo.ac.cn/handle/332002/17352
Appears in Collections:毫米波和亚毫米波技术实验室_期刊论文

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