Emission redistribution from a quantum dot-bowtie nanoantenna

Abstract

Abstract. We present a combined experimental and simulation study of a single self-assembled InGaAs quantum dot coupled to a nearby (∼ 25 ) plasmonic antenna. Micro-photoluminescence spectroscopy shows a ∼ 2.4× increase of intensity, which is attributed to spatial far-field redistribution of the emission from the quantum dot-antenna system. Power-dependent studies show similar saturation powers of 2.5for both coupled and uncoupled quantum dot emission in polarization-resolved measurements. Moreover, time-resolved spectroscopy reveals the absence of Purcell-enhancement of the quantum dot coupled to the antenna as compared to an uncoupled dot, yielding comparable exciton lifetimes of ∼ 0.5 . This observation is supported by numerical simulations, suggesting only minor Purcelleffects of < 2× for emitter-antenna separations > 25 . The observed increased emission from a coupled quantum dot-plasmonic antenna system is found to be in good qualitative agreement with numerical simulations and will lead to a better understanding of light-matter-coupling in such novel semiconductor-plasmonic hybrid systems

Molecular Optomechanics in the Anharmonic Cavity-QED Regime Using Hybrid Metal–Dielectric Cavity Modes

“…The SERS process can be viewed as an effective enhancement of the optomechanical coupling between the localized surface plasmon resonance and the vibrational mode of the molecule, which has inspired recent ideas of molecular optomechanics 11,12 . There has also been intense interest in using MNPs to explore regimes of quantum optical plasmonics [13][14][15][16][17][18] , including recent work on pulsed molecular optomechanics 19 that observed a superlinear Stokes emission spectrum. However, sufficiently strong optomechanical coupling at the few photon regime, which facilitates nonlinear quantum optical effects such as the single photon blockade 20,21 , remains largely unexplored in the context of SERS.…”

“…Carefully fabricated MNPs allow extreme enhancement of electromagnetic fields, in the form of localized hot-spots, which has enabled SERS to emerge as a powerful tool in identifying the structural fingerprint of different molecules and proteins, down to the single-molecule level. − MNPs have also been used in hybrid metal–dielectric platforms to optically observe single atomic ions . The SERS process can be viewed as an effective enhancement of the optomechanical coupling between the localized surface plasmon resonance and the vibrational mode of the molecule, which has inspired recent ideas of molecular optomechanics. , There has also been intense interest in using MNPs to explore regimes of quantum optical plasmonics, − including recent work on pulsed molecular optomechanics that observed a superlinear Stokes emission spectrum. However, sufficiently strong optomechanical coupling at the few-photon regime, which facilitates nonlinear quantum optical effects such as the single-photon blockade, , remains largely unexplored in the context of SERS.…”

Control of the emission of elementary quantum systems using metamaterials and nanometaparticles

“…In [127,128], the influence of a gold bow-tie nanoantenna on the emission of a single InGaAs quantum dot located at a distance of 25 nm from it was studied (Fig. 16a).…”

High speed video recording system on a chip for detonation jet engine testing

“…During RTL synthesis behavioral RTL code was transformed into structural RTL code according to technological cell libraries. In result behavioral Verilog file was converted into logic level Verilog implementation [8][9][10][11].…”