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Well-width dependence of bound to quasi-bound intersubband transition in GaAs quantum wells with multi-quantum barriers

✍ Scribed by K Ohtani; Yuzo Ohno; Fumihiro Matsukura; Hideo Ohno

Publisher
Elsevier Science
Year
1998
Tongue
English
Weight
84 KB
Volume
2
Category
Article
ISSN
1386-9477

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✦ Synopsis

Well-width dependence of bound to quasi-bound intersubband transitions in GaAs quantum wells (QW) with multi-quantum barriers (MQB) is investigated. Narrowing the well width, the absorption peak shifts to higher energy while integrated absorption intensity decreases as the quasi-bound state energy increases. The transition energies are in good agreement with the calculation, whereas the observed decrease of integrated absorption is found to be larger than the decrease in oscillotor strength due to the spread to quasi-bound wave function. Using a simple rate equation, the decrease of the integrated absorption is discussed.

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