Title :
Terahertz intersubband transitions in the conduction band of Ge/SiGe multi quantum wells
Author :
Busby, Y. ; Capellini, G. ; Evangelisti, F. ; Ortolani, M. ; Virgilio, M. ; Grosso, G. ; Pizzi, G. ; Nucara, A. ; Lupi, S. ; De Seta, M.
Author_Institution :
Univ. di Roma Tre, Rome, Italy
Abstract :
We present intersubband absorption in the conduction band of compressively strained germanium quantum wells bounded by Ge-rich SiGe barriers. The measured absorption energies are in the 5-12 THz range depending on the well width. These results may be relevant for the design of SiGe-based THz Quantum Cascade emitters.
Keywords :
Ge-Si alloys; absorption coefficients; conduction bands; elemental semiconductors; germanium; microwave photonics; optical materials; semiconductor quantum wells; terahertz wave generation; terahertz wave spectra; Ge-SiGe; absorption energies; conduction band; frequency 5 THz to 12 THz; intersubband absorption; multiquantum wells; quantum cascade emitters; terahertz intersubband transitions; Absorption; Energy measurement; Optical interferometry; Optical reflection; Optical waveguides; Quantum well devices; Silicon germanium;
Conference_Titel :
Infrared Millimeter and Terahertz Waves (IRMMW-THz), 2010 35th International Conference on
Conference_Location :
Rome
Print_ISBN :
978-1-4244-6655-9
DOI :
10.1109/ICIMW.2010.5612749
