School of Physics and Astronomy, University of Nottingham, Nottingham NG7 2RD, United Kingdom.
Phys Rev Lett. 2012 Jun 1;108(22):226601. doi: 10.1103/PhysRevLett.108.226601. Epub 2012 May 31.
We demonstrate that controlled subnanosecond bursts of electronic charge can be transferred through a resonant tunneling diode by successive picosecond acoustic pulses. The effect exploits the nonlinear current-voltage characteristics of the device and its asymmetric response to the compressive and tensile components of the strain pulse. This acoustoelectronic pump opens new possibilities for the control of quantum phenomena in nanostructures.
我们证明,通过连续的皮秒声波脉冲,可以在共振隧道二极管中传递受控的亚纳秒电子电荷脉冲。该效应利用了器件的非线性电流-电压特性及其对应变脉冲压缩和拉伸分量的不对称响应。这种声电子泵为控制纳米结构中的量子现象开辟了新的可能性。