Ultra-narrow and widely tunable Mn^(2+) Emission from Single Nanocrystals of ZnS-CdS alloy

Abstract

Extensively studied Mn-doped semiconductor nanocrystals have invariably exhibited photoluminescence (PL) over a narrow energy window of width <= 149 meV in the orange-red region and a surprisingly large spectral width (>= 180 meV), contrary to its presumed atomic-like origin. Carrying out emission measurements on individual single nanocrystals and supported by ab initio calculations, we show that Mn PL emission, in fact, can (i) vary over a much wider range (~ 370 meV) covering the deep green-deep red region and (ii) exhibit widths substantially lower (~ 60-75 meV) than reported so far, opening newer application possibilities and requiring a fundamental shift in our perception of the emission from Mn-doped semiconductor nanocrystals.

arXiv comment5 pages, 5 figures

References in corpus (5)

• Optical manipulation of a single Mn spin in a CdTe-based quantum dot
• Geometrical effects on the optical properties of quantum dots doped with a single magnetic atom
• Spin-polarized Mn${}^{2+}$ emission from Manganese-doped colloidal nanocrystals
• Optical Stark Effect and Dressed Excitonic States in a Mn-doped Quantum Dot
• Brightening of dark excitons in a single quantum dot containing a single magnetic ion

Cited by in corpus (1)

• Insights on heterogeneity in blinking mechanisms and non-ergodicity using sub-ensemble statistical analysis of single quantum-dots