Raman scattering of laser beam by single cyclotron electron - ultimate mechanism

Summary form only given. A single cyclotron electron is one of the most fundamental systems exhibiting a class of nonlinear optical effects. Following a prediction, it was demonstrated that a single cyclotron electron could exhibit hysteresis. Such a simple nonlinear system can also be excited by hysteretic subharmonic and cyclo-Raman resonances. For the process of a high-order cyclo-Raman resonance, the cyclotron motion can be excited by using two laser beams with their frequency difference close to the multiple of cyclotron frequency. Here, we present another novel and fundamental effect based on this simplest nonlinear system with a Raman scattering configuration. A laser beam propagates in the plane of the cyclotron motion with its polarization parallel to the z axis (the same as the direction of the dc magnetic field). Such an oscillating electric field can induce non-cyclotron-frequency component of the electron motion. The cyclotron electron can in turn radiate according to synchrotron radiation. In order to maintain the electron cyclotron motion, one must use a millimeter (mm) or THz beam to balance the radiation loss. The frequency of the radiation can be shifted from the laser frequency by the multiple of the cyclotron frequency. This process corresponds to multiple order Raman scattering of a laser beam by a cyclotron electron.