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Microwave based nanogenerator using the ratchet effect in Si/SiGe heterostructures

机译：基于棘轮效应的Si / SiGe异质结构的微波纳米发电机

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摘要

Ratchet based microwave current generators and detectors were developed in Si/SiGe heterostructures for wireless communication with the possibility of extending the detection limit to the terahertz range. A microwave induced ratchet current was generated in the two-dimensional electron gas by patterning an array of semicircular antidots in hexagonal geometry. The spatial asymmetry created by the semicircular antidots forces the electrons under the influence of the microwave electric field to move preferentially towards the direction of the semidisc axis. A photovoltage of the order of few millivolts was observed. Such a photovoltage was completely absent in a symmetric system consisting of circular antidots. The induced photovoltage increased monotonically with microwave power and was found to be independent of the microwave polarization. This device opens the possibility of employing silicon based heterostructures for nanogenerators and other wireless communication devices using microwaves.
机译：在Si / SiGe异质结构中开发了基于棘轮的微波电流发生器和检测器，用于无线通信，并有可能将检测极限扩展到太赫兹范围。微波感应的棘轮电流是在二维电子气中通过对六边形几何形状的半圆形解毒剂阵列进行构图而产生的。由半圆解毒剂产生的空间不对称性迫使电子在微波电场的影响下优先向半圆盘的方向移动。观察到几毫伏的光电压。在由圆形解毒剂组成的对称系统中完全没有这种光电压。感应光电压随微波功率单调增加，并且与微波极化无关。该设备打开了将基于硅的异质结构用于纳米发电机和其他使用微波的无线通信设备的可能性。

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