Opt Lett. 2022 Dec 1;47(23):6225-6228. doi: 10.1364/OL.476394.
We demonstrate a free-space optical communication link with an optical transmitter that harvests naturally occurring Planck radiation from a warm body and modulates the emitted intensity. The transmitter exploits an electro-thermo-optic effect in a multilayer graphene device that electrically controls the surface emissivity of the device resulting in control of the intensity of the emitted Planck radiation. We design an amplitude-modulated optical communication scheme and provide a link budget for communications data rate and range based on our experimental electro-optic characterization of the transmitter. Finally, we present an experimental demonstration achieving error-free communications at 100 bits per second over laboratory scales.
我们展示了一种自由空间光通信链路，其中光学发射器利用来自热体的自然普朗克辐射，并调制发射强度。该发射器利用多层石墨烯器件中的电光效应，通过电控制器件的表面发射率，从而控制发射的普朗克辐射强度。我们设计了一种幅度调制光通信方案，并根据发射器的电光特性实验表征，提供了通信数据速率和范围的链路预算。最后，我们展示了一个实验演示，在实验室规模上实现了无差错的 100 位/秒通信。
