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http://hdl.handle.net/2307/314
Title: | Conduction band intersubband transitions in Ge/SiGe quantum wells | Authors: | De Seta, Monica Capellini, Giovanni Busby, Yan Evangelisti, Florestano Ortolani, Michele Virgilio, Michele Grosso, Giuseppe Pizzi, Giovanni Nucara, Alessandro Lupi, Stefano |
Keywords: | cascade emitters electroluminescence heterostructures physics devices |
Issue Date: | Aug-2009 | Publisher: | American Institute of Physics | 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. | URI: | http://hdl.handle.net/2307/314 | ISSN: | 0003-6951 | DOI: | 10.1063/1.3198204 |
Appears in Collections: | A - Articolo su rivista X_Dipartimento di Fisica 'Edoardo Amaldi' |
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