Abstract

AbstractRecent experiment‐theory investigations have demonstrated that the 2p‐exciton state and the polariton resonances of a semiconductor quantum‐well (QW) microcavity form a lambda (Λ) system where a terahertz (THz) field can selectively couple to either of the transitionallowed arms. However, semiconductors are open systems because seemingly isolated states are coupled to the continuum of states, either directly or via Coulomb or phonon scattering.A systematic theory is presented to treat these effects in a Λ system and in a two‐level system (TLS) described by the 1s‐to‐2p exciton transition in a semiconductor QW, without the microcavity. Excitonic occupations of polarization are analyzed as function of THz‐field frequency and intensity with (Λ system) and without (TLS) cavity. Even though the existence of Λ and TLS resonances is verified, significant deviations are observed at higher THz intensities, as higher ionized exciton states are generated via multi‐THz‐photon absorption.

Talk to us

Join us for a 30 min session where you can share your feedback and ask us any queries you have

Schedule a call

Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.