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Don't Blink! NIST Studies Why Quantum Dots Suffer from 'Fluorescence Intermittency'
    
  Experimental apparatus used to investigate quantum dot blinking. A quantum dot is optically excited using a laser and its fluorescence is collected and split into two paths, each equipped with a single photon avalanche diode (SPAD). A time correlator is used to record the arrival times of the photons on each SPAD, from which the photon autocorrelation function is determined. SEM images of the quantum dot devices studied include a circular grating 'bullseye' optical cavity (b) and a microdisk optical cavity (c).

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May 23, 2014

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