Harvesting sustainable energy resources from surrounding environments to power small electronic devices and systems has attracted massive research attention. Herein, we develop a novel technology to harvest light energy to self-power and simultaneously sense mechanical acceleration in a monolithic structure. When the photonic gate is illuminated the operation mode of the device changes from conventional mode to light harvesting and self-powered operation. The light illumination provides a gradient of majority carrier concentration on the top semiconductor layer, generating a lateral photovoltage, which is the output voltage of the sensor. Under acceleration, the mechanical inertial force induces stress in the sensor material leading to the change of mobility of the charge carriers, which shifts their diffusion rate, and hence changes the gradient of the majority carriers and the lateral photovoltage. The sensitivity at 480 lx light illumination was measured to be 107 $\mu V/g$, while it was approximately 30 $\mu V/g$ under the ambient light illumination without any electrical power source. In addition, the acceleration sensitivity is tunable by controlling parameters of the photonic gate such as light power, light spot position and light wavelength. The integration of sensing and powering functions into a monolithic platform proposed in this work eliminates the requirement of external power sources and offers potential solutions for wireless, independent, remote, and battery-free sensing devices and systems.

从周围环境中收集可持续能源来为小型电子设备和系统供电，已引起了广泛的研究关注。本文中，我们开发了一种新颖的技术，可将光能收集为自功率，并同时感测整体结构中的机械加速度。当光子门被照亮时，设备的操作模式从常规模式更改为光收集和自供电操作。光照在顶部半导体层上提供了多数载流子浓度的梯度，从而产生横向光电压，即传感器的输出电压。在加速下，机械惯性力会在传感器材料中产生应力，从而导致电荷载流子迁移率发生变化，从而改变其扩散速率，因此会改变多数载流子的斜率和横向光电压。在480 lx光照下的灵敏度经测量为107$\mu V/G$，虽然大约是30 $\mu V/G$在没有任何电源的环境光照射下。另外，可以通过控制光子门的参数（例如光功率，光斑位置和光波长）来调整加速度灵敏度。这项工作中提出的将感应和供电功能集成到单片平台中，消除了对外部电源的需求，并为无线，独立，远程和无电池感应设备和系统提供了潜在的解决方案。