Title :
Wrinkled SiGe Nanofilms as a Source of Terahertz Radiation
Author :
Fedorchenko, Alexander I. ; Cheng, Henry H. ; Koroleva, Anastasia ; Wei-Chih Wang
Author_Institution :
Inst. of Thermomech., Prague, Czech Republic
Abstract :
We demonstrate that the wrinkled Si1-xGex/Si1-yGey films can serve as radiation sources, which emit electromagnetic waves in a very wide range of the frequencies including the terahertz band from 0.3 to 3 THz. The emission mechanism is based on the change of acceleration of carriers, when they travel along the sinusoidal trajectory in wrinkled Si1-xGex/Si1-yGey films, a manner similar to synchrotron radiation with undulators, or like a free-electron laser.
Keywords :
Ge-Si alloys; nanostructured materials; semiconductor materials; semiconductor thin films; terahertz wave spectra; Si1-xGex-Si1-yGey; carrier acceleration; electromagnetic waves; emission mechanism; frequency 0.3 THz to 3 THz; sinusoidal trajectory; terahertz band; terahertz radiation source; wrinkled nanofilms; Etching; Films; Nanostructures; Quantum cascade lasers; Silicon; Silicon germanium; Trajectory; hole oscillation; terahertz radiation; wrinkled SiGe nanofilms;
Conference_Titel :
Optomechatronic Technologies (ISOT), 2014 International Symposium on
DOI :
10.1109/ISOT.2014.37
