Collective Quantum Dot Inversion and Amplification of Photon and Phonon Waves

Abstract

The possibility of steady-state population inversion in a small sample of strongly driven two-level emitters like quantum dots (QDs) in micro-cavities, and its utilization towards amplification of light and acoustic waves is investigated theoretically. We find that inversion and absorption spectrum of photons, and phonons crucially depend on the interplay between the intrinsic vacuum and phonon environments. The absorption profiles of photons and phonons show marked novel features like gain instead of transparency and absorption reversed to gain, respectively. Furthermore, we report collectivity induced substantial enhancement of inversion and pronounced gain in the photon, and phonon absorption spectrum for a wavelength size QD ensemble.

5 pages, 3 figures

References in corpus (4)

• Quantum nature of a strongly-coupled single quantum dot-cavity system
• Population inversion of driven two-level systems in a structureless bath
• Phonon-assisted decoherence in the production of polarization-entangled photons in a single semiconductor quantum dot
• Nonclassical Correlation of Polarization Entangled Photons in a Biexciton-Exciton Cascade

Cited by in corpus (7)

• Photon Scattering from a System of Multi-Level Quantum Emitters. I. Formalism
• Time-resolved pump-probe signals of a continuously driven quantum dot affected by phonons
• Engineering a squeezed phonon reservoir with a bichromatic driving of a quantum dot
• Entanglement of a laser driven pair of two-level qubits via its phonon environment
• Role of generalized parity in the symmetry of fluorescence spectrum from two-level systems under periodic frequency modulation
• Quantum correlations among optical and vibrational quanta
• Establishment of correlated states in a quantum dot interacting with an acoustic phonon reservoir