Abstract
Dibenzoterrylene (DBT) molecules within a crystalline anthracene matrix show promise as quantum emitters for controlled, single photon production. We present the design and construction of a chamber in which we reproducibly grow doped anthracene crystals of optical quality that are several mm across and a few μm thick. We demonstrate control of the DBT concentration over the range 6-300 parts per trillion and show that these DBT molecules are stable single-photon emitters. We interpret our data with a simple model that provides some information on the vapour pressure of DBT.
Highlights
Individual photons provide an excellent way to encode quantum information,1 and interference between photons offers a practical way to process that information.2 For this purpose, one would like a source of photons that are available on demand at short notice and are indistinguishable so that they will interfere with each other
We present the design and construction of a chamber in which we reproducibly grow doped anthracene crystals of optical quality that are several mm across and a few μm thick
We demonstrate control of the DBT concentration over the range 6–300 parts per trillion and show that these DBT molecules are stable single-photon emitters
Summary
Individual photons provide an excellent way to encode quantum information, and interference between photons offers a practical way to process that information. For this purpose, one would like a source of photons that are available on demand at short notice and are indistinguishable so that they will interfere with each other. Single crystals have been made with high purity, and with a low density of defects, using the physical vapour growth method.. With the uncontrolled side walls far away and small, this method reproducibly grows many crystals of the same shape and size, but the convective coupling between the closely spaced top and bottom only permits a small temperature difference, and the growth runs typically last for days. It is important to control the concentration of DBT molecules within the crystal, and this is not achieved with the methods outlined above because the concentration is mainly sensitive to the temperatures of individual crucibles. Crucibles for the anthracene and DBT are separately heated to achieve the desired DBT concentration and fast growth rate
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
