Probing Bose-Einstein Condensation of Excitons with Electromagnetic Radiation

Abstract

We examine the absorption spectrum of electromagnetic radiation from excitons, where an exciton in the $1s$ state absorbs a photon and makes a transition to the $2p$ state. We demonstrate that the absorption spectrum depends strongly on the quantum degeneracy of the exciton gas, and that it will generally manifest many-body effects. Based on our results we propose that absorption of infrared radiation could resolve recent contradictory experimental results on excitons in Cu${}_2$O.

4 pages, RevTex, 8 ps figures, submitted to PRL

References in corpus (3)

• Theory of Bose-Einstein condensation in trapped gases
• Optical excitations in a non-ideal Bose gas
• Auger decay, Spin-exchange, and their connection to Bose-Einstein condensation of excitons in Cu_2O

Cited by in corpus (8)

• Bose-Einstein Condensation of Excitons in Cu${}_2$O: Progress Over Thirty Years
• Influence of Coulomb and Phonon Interaction on the Exciton Formation Dynamics in Semiconductor Heterostructures
• Study of ortho-to-paraexciton conversion in Cu${}_2$O by excitonic Lyman spectroscopy
• Charge Density Wave Hampers Exciton Condensation in 1T-TiSe${}_2$
• Transient terahertz spectroscopy of excitons and unbound carriers in quasi two-dimensional electron-hole gases
• Bose-Einstein condensation of excitons in Cu${}_2$O
• Collective Excitations of a Two-Component Bose Condensate at Finite Temperature
• Pattern Formation in Exciton System near Quantum Degeneracy