Diamond in tellurite glass: a new medium for quantum information

Quantum mechanics has defi ned twentieth century technology and quantum information science has been identifi ed as potentially one of the most disruptive technologies of the twentyfi rst century. [ 1 ] A major challenge for the development of this fi eld is the requirement to create a quantum-classical interface to effi ciently allow quantum information to be integrated with a photonic backbone. As such, componentry needs to be developed that places quantum emitters in the bound modes of photonic structures. In recent years, diamond color centers have become one of the most important platforms to exhibit room-temperature quantum effects. [ 2 ] Here we demonstrate a new medium suitable for quantum information consisting of diamond nanocrystals embedded in a tellurite glass, and have taken this material through an optical fi ber drawing process. Single photon emission was demonstrated from the drawn material. By including diamond color centers within a soft glass we open the possibility of leveraging all of the designs of microstructured optical fi bers [ 3 ] and optical cavities to integrate quantum emitters with bound optical modes.