Room‐Temperature Solid‐State Quantum Emitters in the Telecom Range

Abstract

Building a quantum network is the ultimate goal of quantum information science. Among the candidates to realize quantum node, quantum repeater, and quantum channel, the solid-state emitters are particularly outstanding because of the presence of the spin-photon interface. Some of the solid-state emitters such as carbon nanotubes, color centers, transition metal ions, and rare earth ions can give telecom wavelength emission at room temperature. These emitters have different origins of single-photon emission. Here, the basic properties of each kind of emitter and their progress towards applications are reviewed. This review also introduces the current efforts to improve the emitters' brightness by integrating them into nanostructures.

Perspective on Solid‐State Single‐Photon Sources in the Infrared for Quantum Technology

“…In quantum information science and technology, IR singlephoton sources are essential for the implementation of various quantum protocols, such as quantum key distribution, [7] quantum teleportation, [8] and quantum computing. [9][10][11] These protocols require the production of pure, indistinguishable single photons, which solid-state single-photon sources can provide. Solid-state single-photon sources in the IR offer even more advantages in sensing and metrology.…”