Terahertz wide range tunable cyclotron resonance p-Ge laser

Abstract

We present a Terahertz (THz) p-Ge laser operating in a cyclotron resonance (CR) mode. Thanks to the use of the optimum crystallographic orientation of p-Ge with respect to crossed E⊥B fields, the laser line frequency is continuously tunable in the range 1.2-2.8 THz (40-90 cm-1) with the linewidth being 6 GHz (0.2 cm-1). We also show that due to such a wide CR radiation range, the laser can serve as a base for a THz spectrometer. © 2009 IOP Publishing Ltd.