Direct probe of spectral inhomogeneity reveals synthetic tunability of single-nanocrystal spectral linewidths.

ABSTRACT: The spectral linewidth of an ensemble of fluorescent emitters is dictated by the combination of single-emitter linewidths and sample inhomogeneity. For semiconductor nanocrystals, efforts to tune ensemble linewidths for optical applications have focused primarily on eliminating sample inhomogeneities, because conventional single-molecule methods cannot reliably build accurate ensemble-level statistics for single-particle linewidths. Photon-correlation Fourier spectroscopy in solution (S-PCFS) offers a unique approach to investigating single-nanocrystal spectra with large sample statistics and high signal-to-noise ratios, without user selection bias and at fast timescales. With S-PCFS, we directly and quantitatively deconstruct the ensemble linewidth into contributions from the average sing

SUBMITTER: Cui J 

PROVIDER: S-EPMC3843964 | biostudies-literature | 2013 Jul

REPOSITORIES: biostudies-literature