Colloidal quantum dots (CQDs) are attractive material for single-photon sources (SPSs) that can be utilized at room temperature. In this work, we performed simultaneous measurements of photoluminescence (PL) decay curve and second-order photon correlation, g(2), on single CQDs to study the purity of their single photons, which is determined by the value of g(2)at the time origin. We demonstrate that the single-photon purity can be improved through time-gated g(2) analysis, where a part of the PL signal is excluded by applying a temporal filter to the PL decay curve. We show that by using a superconducting nanowire single-photon detector, it is possible to observe highly-purified single photons that exhibited g(2) at the time origin ranging from 0.01 to 0.02.
Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks.
You are receiving this notice because your organization may not have SPIE eBooks access.*
*Shibboleth/Open Athens users─please
sign in
to access your institution's subscriptions.
To obtain this item, you may purchase the complete book in print or electronic format on
SPIE.org.
INSTITUTIONAL Select your institution to access the SPIE Digital Library.
PERSONAL Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.