Magnetic-field-induced cavity protection for intersubband polaritons

Year: 2022

Authors: De Bernardis D., Jeannin M., Manceau JM., Colombelli R., Tredicucci A., Carusotto I.

Autors Affiliation: Univ Trento, INO CNR BEC Ctr, I-38123 Povo, Italy; Univ Trento, Dipartimento Fis, I-38123 Povo, Italy; Univ Paris Saclay, Ctr Nanosci & Nanotechnol C2N, CNRS UMR 9001, F-91120 Palaiseau, France; Univ Pisa, NEST, CNR Ist Nanosci, Largo Pontecorvo 3, I-56127 Pisa, Italy; Univ Pisa, Dipartimento Fis E Fermi, Largo Pontecorvo 3, I-56127 Pisa, Italy.

Abstract: We analyze the effect of a strong perpendicular magnetic field on an intersubband transition in a disordered doped quantum well strongly coupled to an optical cavity. The magnetic field changes the lineshape of the intersubband optical transition due to the interface roughness of the quantum well from a Lorentzian to a Gaussian one. In this regime, a novel form of magnetic-field-induced cavity protection sets in, which strongly reduces the polariton linewidth to the cavity contribution only. Implications of our results for fundamental studies of nonlinear polariton dynamics and for technological applications to polariton lasers are finally highlighted.

Journal/Review: PHYSICAL REVIEW B

Volume: 106 (22)      Pages from: 224206-1  to: 224206-17

More Information: We are grateful to Giacomo Scalari, Ivan Amelio, Alberto Nardin, and Jacopo Nespolo for fruitful discussions. We acknowledge financial support from the European Union FET-Open Grant No. MIR-BOSE (737017).
KeyWords: Quantum-wells; Hall; States; Localization; Linewidth
DOI: 10.1103/PhysRevB.106.224206

ImpactFactor: 3.700
Citations: 5
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