The effect of periodic spatial perturbations on the emission rates of quantum dots near graphene platforms

Abstract

Quenching of fluorescence (FL) at the vicinity of conductive surfaces, and in particular, near a 2-D graphene layer has become an important biochemical sensing tool. The quenching is attributed to fast non-radiative energy transfer between a chromophore and the lossy conductor. Increased emission rate is also observed when the chromophore is coupled to a resonator. Here we combine the two effects in order to control the emission lifetime of the chromophore. In our case, the resonator was defined by an array of nano-holes in the oxide substrate underneath a graphene surface guide. We demonstrated an emission rate change by more than 50% as the sample was azimuthally rotated with respect to the polarization of the excitation laser. Such control over the emission life-time could be used to control resonance energy transfer (RET) between two chromophores.

arXiv comment29 pages; 14 figures

References in corpus (6)

• Graphene Plasmonics for Terahertz to Mid-Infrared Applications
• Definition and measurement of the local density of electromagnetic states close to an interface
• The local density of optical states of a metasurface
• Transfer of Graphene with Protective Oxide Layers
• Graphene channels interfaced with an array of individual quantum dots
• Nonlinear behavior of vibrating molecules on suspended graphene waveguides