Quantum Transduction of Telecommunications-band Single Photons from a Quantum Dot by Frequency Upconversion

High efficiency frequency upconversion of photons carrying orbital angular momentum for a quantum information interface

“…However, OAM qubits at optical fiber [18] telecommunication wavelengths around 1550 nm could not match the quantum information storage and processing devices based on atoms, ions or NV color centers that absorb and emit photons at visible wavelengths around 600~700 nm. Single-photon frequency upconversion is thereupon considered to be utilized as a quantum information interface that enables qubits to transfer from infrared to visible regime, while preserving the quantum state information [19,20]. In the last decade, those single-photon upconversion systems have featured the near unit quantum conversion efficiency, low background noise, and quantum state maintaining [20][21][22][23][24][25][26] by using a period poled lithium niobate (PPLN) media, providing a possible solution for the quantum information interface for the OAM photons.…”

Controlling the correlations in frequency upconversion in PPLN and PPKTP waveguides

“…By up-converting coherent pulses, which were attenuated to the single photon level, overall efficiencies superior to the detection efficiencies of common NIR APDs have been demonstrated [1][2][3]. Moreover the successful upconversion of single photons from a real single photon source (a semiconductor quantum dot) has recently been accomplished [4]. In the course of these experiments it has been verified that conversion processes are coherent [5,6] and thus suitable for use in quantum networks.…”

Optical quantum memory based on electromagnetically induced transparency

“…In 2010, Rakher et al demonstrated an up-conversion quantum interface [119] as shown in figure 9. Input single photons near the telecom wavelength of 1310 nm were generated by the recombination of excitons in a single epitaxially-grown indium arsenide (InAs) quantum dot.…”

“…(PL, photoluminescence; Si SPAD, silicon single photon avalanche photodiode; FTW, fiber taper waveguide; SMF, single-mode fiber; VOA, variable optical attenuator; FPC, fiber polarization controller; WDM, wavelength division multiplexer; EDFA, erbium-doped fiber amplifier; TBF, tunable bandpass filter; EF, edge-pass filter; BF, bandpass filter; BS, non-polarizing beamsplitter; PPLN WG, periodically poled LiNbO 3 waveguide). Reprinted by permission from Macmillan Publishers Ltd: Nature Photonics [119], copyright (2010).…”