THE SPARROW SINGLE-PHOTON CHIP

The new SPARROW single-photon source is is based on self-assembled InAs quantum dots coupled to a slow-light photonic-crystal waveguide made using a unique processing technology. The slow-light sections feature a low group velocity in order to increase light-matter interaction while the weak-dispersion sections enable more efficient chip out-coupling.

Each end of the waveguide structure is coupled to carefully engineered suspended nano-beam waveguides and out-coupling gratings. The increased coupling efficiency from the quantum dot to the waveguide relies on the strong suppression of radiation modes together with an enhanced coupling into the waveguide mode. This makes it very robust to spatial and spectral dispersity meaning that the quantum dots are efficiently coupled.

The new SPARROW single-photon source is is based on self-assembled InAs quantum dots coupled to a slow-light photonic-crystal waveguide made using a unique processing technology. The slow-light sections feature a low group velocity in order to increase light-matter interaction while the weak-dispersion sections enable more efficient chip out-coupling.

Each end of the waveguide structure is coupled to carefully engineered suspended nano-beam waveguides and out-coupling gratings. The increased coupling efficiency from the quantum dot to the waveguide relies on the strong suppression of radiation modes together with an enhanced coupling into the waveguide mode. This makes it very robust to spatial and spectral dispersity meaning that the quantum dots are efficiently coupled.

HERE’S HOW IT WORKS

HERE’S HOW IT WORKS

Shoot a laser pulse at our SQT quantum-dot chip and it will deliver a stream of single photons. An optical cryostat equipped for confocal spectroscopy is required, but use is simple and straightforward.

The standard SQT-chip with gratings for vertical out-coupling

PROFESSIONAL QUANTUM DESIGN AND NANOPRODUCTION

PROFESSIONAL QUANTUM DESIGN AND NANOPRODUCTION

 

WHAT WE PROVIDE

 

  • Diced single-photon chip
  • Detailed characterization report
  • Extensive system integration support
  • Multiple customization options


 

Excitation mechanism Resonant
Single-photon purity (1-g(2)(0)) >98%
Single-photon coherence
indistinguishability
95-98%
Single-photon efficiency in fiber >100 MHz *
Emission wavelength 920-980 nm
Excitation wavelength Same as emission
wavelength
Operating temperature <6°K
Excitation power Typ. 1-10 μW
Excitation pulse width (recommended) 10-30ps
Single-photon pulse duration 100 ps – 1 ns

* For 0.5 GHz repetition rate pulsed operation of the source

APPLICATION NOTES

APPLICATION NOTES

HOW EXPENSIVE IS IT?

Amazingly enough our single-photon source is not nearly as expensive as one might imagine. 10 years of research. Multiple patents. All rolled into a very compact package that delivers a whopping 98% coupling efficiency can be yours for less than you think.

 

Contact us  for price quote.