Giant intersubband polariton splitting in InAs/AlSb microcavities |
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Authors: | Aji A Anappara David Barate Jan Devenson Alexei Baranov |
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Institution: | a NEST CNR-INFM and Scuola Normale Superiore, Piazza dei Cavalieri 7, I-56126 Pisa, Italy b Centre d’Electronique et de Microoptoélectronique de Montpellier, UMR5507 CNRS/Université Montpellier 2, 34095 Montpellier, France |
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Abstract: | The optical response of the intersubband excitation of multiple InAs/AlSb quantum wells embedded in a planar semiconductor microcavity has been studied through angle-dependent reflectance measurements. Using a resonator based on total internal reflection, a strong coupling is demonstrated between the intersubband optical transition and the cavity photon, with the attendant formation of intersubband polaritons. A giant vacuum-Rabi splitting 2ΩR was observed both at liquid helium temperatures ( ) as well as at 300 K ( ), for a transition energy . The observed ratio is a record high value (14%) for any strongly-coupled systems, and demonstrates the huge potential of this material for the achievement of the ultra-strong coupling regime predicted theoretically. |
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Keywords: | 71 36 +c 42 50 -p 73 21 Fg 78 67 De |
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