Intersubband electroluminescent devices operating in the strong coupling regime

Abstract

We present a detailed study of the electroluminescence of intersubband devices operating in the light-matter strong coupling regime. The devices have been characterized by performing angle resolved spectroscopy that shows two distinct light intensity spots in the momentum-energy phase diagram. These two features of the electroluminescence spectra are associated with photons emitted from the lower polariton branch and from the weak coupling of the intersubband transition with an excited cavity mode. The same electroluminescent active region has been processed into devices with and without the optical microcavity to illustrate the difference between a device operating in the strong and weak coupling regime. The spectra are very well simulated as the product of the polariton optical density of states, and a function describing the energy window in which the polariton states are populated. The voltage evolution of the spectra shows that the strong coupling regime allows the observation of the electroluminescence at energies otherwise inaccessible.

References in corpus (6)

• Quantum vacuum properties of the intersubband cavity polariton field
• Input-output theory of cavities in the ultra-strong coupling regime: the case of a time-independent vacuum Rabi frequency
• Electrically injected cavity polaritons
• Quantum theory of electron tunneling into intersubband cavity polariton states
• Photovoltaic Probe of Cavity Polaritons in a Quantum Cascade Structure
• Quantum model of microcavity intersubband electroluminescent devices

Cited by in corpus (13)

• Light-matter decoupling in the deep strong coupling regime: The breakdown of the Purcell effect
• Ground State Electroluminescence
• Room temperature terahertz polariton emitter
• Layer-Resolved Absorption of Light in Arbitrarily Anisotropic Heterostructures
• Mid-Infrared intersubband polaritons in dispersive metal-insulator-metal resonators
• Optical phonon scattering of cavity polaritons in an electroluminescent device
• Resonant intersubband polariton-LO phonon scattering in an optically pumped polaritonic device
• Multielectron Ground State Electroluminescence
• Many-body physics of intersubband polaritons
• An effective density matrix approach for intersubband plasmons coupled to a cavity field: electrical extraction/injection of intersubband polaritons
• Magnetic field control of intersubband polaritons in narrow-gap semiconductors
• Effect of magnetic field on intersubband polaritons in a quantum well: Strong to weak coupling conversion
• Direct polariton-to-electron tunneling in quantum cascade detectors operating in the strong light-matter coupling regime