HYPERSPECTRAL IMAGING FOR SPECTRAL AND SPATIAL CHARACTERIZATION OF QUANTUM DOTS

摘要

A method for characterizing an ensemble of single photon emitters on a substrate with respect to their location and a characteristic single photon emission wavelength comprises exciting said single photon emitters to emit a luminescence signal comprising a plurality of single photon emissions of said single photon emitters, imaging said luminescence signal of the ensemble of single photon emitters with a collection lens assembly for forming a sample image, said sample image comprising said luminescence signal of the ensemble of single photon emitters, projecting the sample image to overlay a slit, the slit being oriented along a slit direction to select a one-dimensional slice of the sample image, said one-dimensional slice forming a slit image, projecting said slit image onto a wavelength dependent light beam splitter to generate a hyperspectral slit image of said slit image, and collecting said hyperspectral slit image on a two-dimensional sensor array for obtaining wavelength information of the slit image along a first direction of the sensor array and for obtaining location information of single photon emitters selected in the slit image along a second direction of the sensor array.