Toward efficient and tailorable mid-infrared emitters utilizing multilayer graphene
Toward efficient and tailorable mid-infrared emitters utilizing multilayer graphene
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DOI：
10.1063/5.0079777
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发表时间：
2022-01-31
影响因子：
4
通讯作者：
Nash, Geoffrey. R.
中科院分区：
文献类型：
--
作者：
Gowda, Prarthana;Patient, Dean A.;Nash, Geoffrey. R.
持续需要开发用于诸如气体感测和红外信标的应用的具有成本效益且可持续的中红外光源。在这些应用中仍然广泛使用的传统白炽光源的自然替代品是半导体LED，但是为了实现长波长的发射，需要实现具有窄有效带隙的器件，这固有地导致相对较差的内部和外部量子效率。最近，基于石墨烯的白炽发光体的技术潜力已经被认识到，部分原因是石墨烯能够维持极大的电流密度。在这里，我们介绍了一个简单的架构，由多层石墨烯细丝后面的背反射器组成，我们使用它来生产具有与最先进的半导体级联LED相当的壁插效率的发射器。再加上潜在的高速调制，从低热质量，我们的研究结果表明，创造实用的红外光源的可行性。(C)2022年作者。除非另有说明，否则所有文章内容均根据知识共享署名（CC BY）许可证（http：//creativecommons.org/licenses/by/4.0/）进行许可。
There is a continuing need for the development of cost-effective and sustainable mid-infrared light sources for applications such as gas sensing and infrared beacons. A natural replacement for the conventional incandescent sources still widely used in such applications is semiconductor LEDs, but to achieve emission at long wavelengths requires the realization of devices with narrow effective bandgaps, inherently leading to relatively poor internal and external quantum efficiencies. Recently, the technological potential of graphene-based incandescent emitters has been recognized, in part due to the ability of graphene to sustain extremely large current densities. Here, we introduce a simple architecture, consisting of a back-reflector behind a multilayer graphene filament, which we use to produce emitters with wall-plug-efficiencies comparable to state-of-the art semiconductor cascade LEDs. Coupled with the potential for high-speed modulation, resulting from the low thermal mass, our results demonstrate the feasibility of creating practicable infrared sources. (C) 2022 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).