Spectral measurement of a single semiconductor nanoplatelets cluster in radio-frequency trap

In this work, we study the optical response of microclusters of CdSe nanoplates localized in an radio-frequency trap. The luminescence spectra of the stock solution of nanoplates, its microclusters on a glass substrate, and in an radio-frequency trap are compared. The redshift and broadening of the exciton luminescence band, as well as the formation of additional luminescence bands in the long-wavelength region of the spectrum as a result of the aggregation of nanoplates, is shown. The spectra of microclusters localized in an radio-frequency trap are characterized by a greater redshift and broadening of the main band, as well as an increase in the relative contribution of long-wavelength luminescence bands to the spectral response. The possible mechanisms leading to the modification of the luminescence spectra of nanoplate microclusters are discussed.