Transverse magnetic routing of light emission in hybrid plasmonic-semiconductor nanostructures: Towards operation at room temperature

• Published in: arXiv.org
• Main Authors: Klompmaker, L, Poddubny, A N, Yalcin, E, Litvin, L V, Jede, R, Karczewski, G, Chusnutdinow, S, Wojtowicz, T, Yakovlev, D R, Bayer, M, Akimov, I A
• Format: Paper Journal Article
• Language: English
• Published: Ithaca Cornell University Library, arXiv.org 25.06.2021
• Subjects: Circular polarization; Emission analysis; Excitons; Group III-V semiconductors; Light emission; Low temperature; Magnetic fields; Magnetic permeability; Magnetic semiconductors; Physics - Materials Science; Physics - Optics; Plasmonics; Polaritons; Quantum wells; Room temperature; Temperature; Temperature dependence; Zeeman effect
• ISSN: 2331-8422
• DOI: 10.48550/arxiv.2106.13619

We study experimentally and theoretically the temperature dependence of transverse magnetic routing of light emission from hybrid plasmonic-semiconductor quantum well structures where the exciton emission from the quantum well is routed into surface plasmon polaritons propagating along a nearby semiconductor-metal interface. In II-VI and III-V direct band semiconductors the magnitude of routing is governed by the circular polarization of exciton optical transitions, that is induced by a magnetic field. For structures comprising a (Cd,Mn)Te/(Cd,Mg)Te diluted magnetic semiconductor quantum well we observe a strong directionality of the emission up to 15% at low temperature of 20 K and magnetic field of 485 mT due to giant Zeeman splitting of holes mediated via the strong exchange interaction with Mn\(^{2+}\) ions. For increasing temperatures towards room-temperature the magnetic susceptibility decreases and the directionality strongly decreases to 4% at T = 45 K. We also propose an alternative design based on a non-magnetic (In,Ga)As/(In,Al)As quantum well structure, suitable for higher temperatures. According to our calculations, such structure can demonstrate emission directionality up to 5% for temperatures below 200 K and moderate magnetic fields of 1 T.