Photonic transistor and router using a single quantum-dot-confined spin in a single-sided optical microcavity.
Photonic transistor and router using a single quantum-dot-confined spin in a single-sided optical microcavity.
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DOI：
10.1038/srep45582
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发表时间：
2017-03-28
影响因子：
4.6
通讯作者：
Hu CY
中科院分区：
文献类型：
--
作者：
Hu CY
未来的互联网很可能是低功耗的全光互联网和量子力学定律保证绝对安全的量子互联网的混合体。光子将用于数据的处理、路由和通信，而光子晶体管利用弱光控制强光，是构成现代电子学基础的电子晶体管的光学模拟的核心部件。与以前的全光晶体管都是基于光学非线性的完全不同，本文介绍了一种新颖的高增益、高速（达太赫兹）光子晶体管的设计及其在量子极限下的对应物，即，基于线性光学效应的单光子晶体管：单侧光学微腔中单个电子自旋引起的巨大法拉第旋转。单光子或经典光脉冲作为门，通过投影测量设置自旋状态，并控制强光的偏振以打开/阻塞光子通道。由于具有量子信息处理的量子门和光信息处理的晶体管的双重性，这种多功能的自旋腔量子晶体管为全光网络和量子网络提供了理想的固态平台。
The future Internet is very likely the mixture of all-optical Internet with low power consumption and quantum Internet with absolute security guaranteed by the laws of quantum mechanics. Photons would be used for processing, routing and com-munication of data, and photonic transistor using a weak light to control a strong light is the core component as an optical analogue to the electronic transistor that forms the basis of modern electronics. In sharp contrast to previous all-optical tran-sistors which are all based on optical nonlinearities, here I introduce a novel design for a high-gain and high-speed (up to terahertz) photonic transistor and its counterpart in the quantum limit, i.e., single-photon transistor based on a linear optical effect: giant Faraday rotation induced by a single electronic spin in a single-sided optical microcavity. A single-photon or classical optical pulse as the gate sets the spin state via projective measurement and controls the polarization of a strong light to open/block the photonic channel. Due to the duality as quantum gate for quantum information processing and transistor for optical information processing, this versatile spin-cavity quantum transistor provides a solid-state platform ideal for all-optical networks and quantum networks.