http://dspace-roma3.caspur.it:80 The DSpace digital repository system captures, stores, indexes, preserves, and distributes digital research material. Fri, 24 May 2013 10:40:28 GMT 2013-05-24T10:40:28Z http://dspace-roma3.caspur.it/image/logo_roma3.jpg http://dspace-roma3.caspur.it:80 http://hdl.handle.net/2307/314 <Title>Conduction band intersubband transitions in Ge/SiGe quantum wells</Title> <Authors>De Seta, Monica; Capellini, Giovanni; Busby, Yan; Evangelisti, Florestano; Ortolani, Michele; Virgilio, Michele; Grosso, Giuseppe; Pizzi, Giovanni; Nucara, Alessandro; Lupi, Stefano</Authors> <Issue Date>2009-08</Issue Date> <Is part of>Applied Physics Letters</Is part of> <Volume>95</Volume> <Pages>051918-051918-3</Pages> <Abstract>In this letter we present the experimental evidence of intersubbandabsorption in the conduction band of compressively strained germaniumquantum wells bounded by Ge-rich SiGe barriers. The measured absorptionenergies are in the terahertz range and are interpreted by means oftight binding calculations which include self-consistent band-bendingand depolarization effects. From the comparison of experimental andnumerical results a conduction band offset along the L line of about120 meV has been estimated for the studied heterostructures.</Abstract> Fri, 31 Jul 2009 22:00:00 GMT http://hdl.handle.net/2307/314 2009-07-31T22:00:00Z