Coexistence of weak and strong coupling in a photonic molecule through dissipative coupling to a quantum dot
Year: 2025
Type: article
Abstract: We study the emission from a molecular photonic cavity formed by two proximal photonic crystal defect cavities containing a small number of In(Ga)As quantum dots. Under strong excitation, we observe photoluminescence from the bonding and antibonding modes in agreement with ab initio numerical simulations. Power dependent measurements, however, reveal an unexpected peak, emerging at an energy between the bonding and antibonding modes of the molecule. Temperature‐dependent measurements indicate that this unexpected feature is photonic in origin. Time‐resolved measurements show the emergent peak exhibits a lifetime τ M = 0.75(10) ns, similar to both bonding and antibonding coupled modes. Comparisons of experimental results with quantum optical modeling suggest that this new feature arises from a coexistence of weak and strong coupling, due to the molecule emitting in an environment whose configuration permits or, on the contrary, impedes its strong coupling. This scenario is reproduced theoretically with a master equation reduced to the key ingredients of its dynamics and that roots the mechanism to a dissipative coupling between bare modes of the system. Excellent qualitative agreement is obtained between experiment and theory, showing how solid‐state cavity QED can reveal intriguing new regimes of light–matter interaction.
Source: Nanophotonics
Authors: Stefan Lichtmannecker, Santiago Echeverri‐Arteaga, Michael Kaniber, Isabel C. Andrade Martelo, Joaquín Ruiz‐Rivas, Thorsten Reichert, Günther Reithmaier, Per‐Lennart Ardelt, Max Bichler, Eduardo Zubizarreta Casalengua, Edgar A. Gómez, Herbert Vinck‐Posada, Elena del Valle, Kai Müller, Fabrice P. Laussy, Jonathan J. Finley
Institutions: Technical University of Munich, University of Quindío, Universidad de Antioquia, Universitat de València, Munich Center for Quantum Science and Technology, Universidad Nacional de Colombia, Universidad Autónoma de Madrid, Consejo Superior de Investigaciones Científicas, Instituto de Ciencia de Materiales de Madrid
Language: English
Subfield: Atomic and Molecular Physics, and Optics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $2,995
OpenAlex ID: W4416716957