Cavity-enhanced light emission from electrically driven carbon nanotubes
Cavity-enhanced light emission from electrically driven carbon nanotubes
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DOI：
10.1038/nphoton.2016.70
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发表时间：
2016-06-01
期刊：
影响因子：
35
通讯作者：
Pernice, Wolfram H. P.
中科院分区：
文献类型：
--
作者：
Pyatkov, Felix;Fuetterling, Valentin;Pernice, Wolfram H. P.
芯片上光通信的一个重要进展是开发具有定制光学特性的可集成纳米级光子发射器。在这里，我们展示了使用碳纳米管作为电驱动的高速发射器结合纳米光子腔，允许非常窄的线宽。所示的一维光子晶体腔光谱选择所需的发射波长，增强强度，并有效地耦合到底层的光子网络具有高再现性的光。在脉冲电压激励下，我们实现了GHz范围内的片上调制速率，与有源光子网络兼容。由于分子发射器的线宽由光子晶体的品质因子决定，我们的方法有效地消除了由于温度，表面相互作用和热载流子注入的线宽展宽。
An important advancement towards optical communication on a chip would be the development of integratable, nanoscale photonic emitters with tailored optical properties. Here we demonstrate the use of carbon nanotubes as electrically driven high-speed emitters in combination with a nanophotonic cavity that allows for exceptionally narrow linewidths. The one-dimensional photonic crystal cavities are shown to spectrally select desired emission wavelengths, enhance intensity and efficiently couple light into the underlying photonic network with high reproducibility. Under pulsed voltage excitation, we realize on-chip modulation rates in the GHz range, compatible with active photonic networks. Because the linewidth of the molecular emitter is determined by the quality factor of the photonic crystal, our approach effectively eliminates linewidth broadening due to temperature, surface interaction and hot-carrier injection.