Enhanced Single-Photon Emission from Single Quantum Dots Interacting with a One-Dimensional Plasmonic Chip

Abstract

Modification of the photoluminescence (PL) behavior of a single colloidal quantum dot (QD) using plasmonic nanostructures has attracted considerable attention. Here, we attempted to control the PL behavior of a single CdSe/ZnS QD by using a one-dimensional plasmonic chip (1D-PC) with the simplest Ag grating pattern. By optimizing the distance between the single QD and 1D-PC, the PL intensity of the single QD was successfully enhanced 5 times with maintaining single-photon emission via enhancement of the excitation rate due to the electric field of the surface plasmon on the 1D-PC. On the other hand, control of the emission photon statistics, that is, single-photon emission and multiphoton emission, from the single QD was difficult because enhancement of the radiative rate of the single QD was not achieved by the 1D-PC. These results indicate that the 1D-PC is an attractive plasmonic nanostructure to obtain efficient single-photon emission which is indispensable for next-generation quantum information technologies.

Correlation between Single-Photon Emission and Size of Cesium Lead Bromide Perovskite Nanocrystals

“…Lead halide perovskite nanocrystals (PNCs) are gaining attention owing to their outstanding optical properties such as narrow photoluminescence (PL) spectra, high PL quantum yield (PLQY), high defect tolerance, and tunable PL spectra via size and composition. − Thus, PNCs have been used in optoelectronic devices including light-emitting diodes, − lasers, , and photodetectors. , As with typical II–VI, III–V, and IV–VI semiconductor nanocrystals known as quantum dots (QDs), single-photon emission from an isolated single PNC is an interesting optical property. − The observation of single-photon emission is essential for determining whether the object is a single emitter. Additionally, single-photon emission is important for practical quantum information technologies.…”

Quantum Dot Transfer from the Organic Phase to Acrylic Monomers for the Controlled Integration of Single-Photon Sources by Photopolymerization

“…In this context, the spatially controlled integration of single QDs with nanometer precision into optical and plasmonic devices is crucial for the development of on-chip single-photon sources. − In the past few years, scientists have tried to achieve this result by employing different technologies using molecular beam epitaxy , or in situ electron beam lithography. − A different and successful approach consists in the incorporation of QDs into photopolymerizable resins, allowing for the precise location of QDs and the integration of single nanoemitters into optical and plasmonic devices, by using two-photon lithography. ,, This is a faster and use-friendly single-step process, as it does not require an electron-collimated beam or vacuum technology while managing to precisely locate QDs in a three-dimensional volume, on whichever kind of substrate.…”

Physical Chemistry of Quantum Information Science

“…Plasmonic nanostructures decorated with quantum dots have been explored as a platform to control their photoluminescence behavior, as in the work by H. Takase et al By optimizing the distance between the quantum dots, the photoluminescence intensity of a single quantum dot was enhanced due to plasmons. Y. Huang and G. Yang placed quantum dots in a resonant nanocavity to demonstrate enhanced light–matter interactions, which can promote the development of quantum optics and quantum information processing.…”