Active demultiplexing of single photons from a solid‐state source
Francesco Lenzini, Ben Haylock, Juan C. Loredo, Raphael A. Abrahão, Nor A. Zakaria, Sachin Kasture, Isabelle Sagnes, Aristide Lemaitre, Hoang‐Phuong Phan, Dzung Viet Dao, Pascale Senellart, Marcelo P. Almeida, Andrew G. White, Mirko Lobino · Laser & Photonics Review · 2017
Abstract A scheme for active temporal‐to‐spatial demultiplexing of single photons generated by a solid‐state source is introduced. The scheme scales quasi‐polynomially with photon number, providing a viable technological path for routingnphotons in the one temporal stream from a single emitter tondifferent spatial modes. Active demultiplexing is demonstrated using a state‐of‐the‐art photon source—a quantum‐dot deterministically coupled to a micropillar cavity—and a custom‐built demultiplexer—a network of electro‐optically reconfigurable waveguides monolithically integrated in a lithium niobate chip. The measured demultiplexer performance can enable a six‐photon rate three orders of magnitude higher than the equivalent heralded SPDC source, providing a platform for intermediate quantum computation protocols. image