Atomically precise graphene quantum dots synthesized by bottom-up chemistry are promising versatile single emitters with potential applications for quantum photonic technologies. Toward a better understanding and control of graphene quantum dot (GQD) optical properties, we report on single-molecule spectroscopy at cryogenic temperature. We investigate the effect of temperature on the GQDs’ spectral linewidth and vibronic replica, which we interpret building on density functional theory calculations. Finally, we highlight that the vibronic signatures are specific to the GQD geometry and can be used as a fingerprint for identification purposes.
Vibronic fingerprints in the luminescence of graphene quantum dots at cryogenic temperature
Note: This paper is part of the JCP Special Topic on The Ever-Expanding Optics of Single-Molecules and Nanoparticles.
Thomas Liu, Baptiste Carles, Christine Elias, Claire Tonnelé, Daniel Medina-Lopez, Akimitsu Narita, Yannick Chassagneux, Christophe Voisin, David Beljonne, Stéphane Campidelli, Loïc Rondin, Jean-Sébastien Lauret; Vibronic fingerprints in the luminescence of graphene quantum dots at cryogenic temperature. J. Chem. Phys. 14 March 2022; 156 (10): 104302. https://doi.org/10.1063/5.0083282
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