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Improved GaN Quantum Well Microcavities for Robust Room Temperature Polaritonics
Author(s) -
Amargianitakis Emmanouil A.,
Miziou Foteini,
Androulidaki Maria,
Tsagaraki Katerina,
Kostopoulos Athanasios,
Konstantinidis George,
Delamadeleine Eric,
Monroy Eva,
Pelekanos Nikos T.
Publication year - 2019
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.201800716
Subject(s) - quantum well , polariton , dielectric , materials science , wavelength , optoelectronics , transmittance , nitride , quantum , exciton , condensed matter physics , optics , physics , nanotechnology , laser , quantum mechanics , layer (electronics)
New experiments on state‐of‐the‐art nitride polariton microcavities are reported which consist of high‐quality 3λ/2‐membranes with 8, 10, or 38 GaN/Al 0.07 Ga 0.93 N quantum wells, embedded in all‐dielectric distributed Bragg reflectors (DBRs). The optical density of the membranes, extracted from transmittance measurements taking into account standing wave effects, is found proportional to the number of quantum wells. At room temperature, the optical density per quantum well at the exciton wavelength reaches values around 3.5%. It is demonstrated that a top DBR consisting of four alternating pairs of SiO 2 /Ta 2 O 5 is sufficient to obtain robust polariton features from these membranes at room temperature, with a Rabi splitting of 36 and 71 meV for the 10 and 38 quantum well microcavities, respectively.