Fibre-coupled, single photon detector based on NbN superconducting nanostructures for quantum communications

Słysz, W.; Węgrzecki, M.; Bar, Jan; Grabiec, P.; Górska, M.; Zwiller, Valéry; Latta, Christian; Böhi, Pascal; Pearlman, Aaron; Cross, A.; Pan, Dong; Kitaygorsky, J.; Komissarov, I.; Verevkin, A.; Milostnaya, I.; Korneev, A.; Minayeva, O.; Chulkova, G.; Smirnov, K.; Voronov, B.; Gol’tsman, G.; Sobolewski, Roman

doi:10.1080/09500340600779496

Cited by 15 publications

(12 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…based on NbN nanostripes [1,2] have already been demonstrated to be the fastest and most sensitive optical and near-infrared photon counters [3,4] and are expected to play a leading role in such applications as ber--based quantum communications [5], optical information processing [6], free-space satellite communications [6], or medical diagnostics [7]. In a typical design, an SSPD is a 10× 10 µm 2 meander consisting of an ultrathin (≈ 5 nm thick) and 100 ÷ 200 nm wide NbN nanostripe.…”

mentioning

confidence: 99%

Technology of Ultrathin NbN and NbTiN Films for Superconducting Photodetectors

et al. 2011

Self Cite

View full text Add to dashboard Cite

mentioning

confidence: 99%

Technology of Ultrathin NbN and NbTiN Films for Superconducting Photodetectors

et al. 2011

Self Cite

View full text Add to dashboard Cite

“…7) of a photoresponse of a 100-µm 2 -area SSPD, taking into account the true dimensions of the NbN SSPD: thickness d = 4 nm, stripe width w = 120 nm, and an 80-nm gap between the stripes [11]. In the same experimental setup, we also measured the timing jitter of our fiber-coupled detectors.…”

Section: Photoresponse Parametersmentioning

confidence: 96%

“…Recently, we have also used 10 × 20 µm 2 devices. The critical current density J c of the completed nanostructures varied from 2 to 6 MA/cm 2 at 4.2 K, with T c ≈10 K. The basic idea of the fiber-coupled SSPD working immersed and operated in a standard liquid-helium transport Dewar has been presented in our previous works [11,12]. The photon delivery to the NbN detector is provided by a single or multimode fiber, while the electrical output is connected to room-temperature electronics via an SMA connector directly integrated with the SSPDs coplanar waveguide output.…”

Section: Construction Of the Detectormentioning

confidence: 99%

“…As we have already stated, the NbN SSPDs are ultrafast, and efficiently count photons with wavelengths ranging from ultraviolet to infrared. They have already been successfully implemented for free-space (laboratory) detection at wavelengths 0.4 to 6.0 µm [2,16], as well as in optical fiber-based setup at wavelengths 0.9, 1.3, and 1.55 µm [11,12].…”

Section: Introductionmentioning

confidence: 99%

“…We used a 0.9-µm-wavelength femtosecond pulsed laser as a test source. The fiber-coupled NbN detectors work immersed in liquid helium, and since both their fiber and electrical interconnects are outside the Dewar, they can be regarded as a room-temperature-like devices [11,12].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Fiber-coupled NbN superconducting single-photon detectors for quantum correlation measurements

et al. 2007

Self Cite

View full text Add to dashboard Cite

We have fabricated fiber-coupled superconducting single-photon detectors (SSPDs), designed for quantum-correlationtype experiments. The SSPDs are nanostructured (~100-nm wide and 4-nm thick) NbN superconducting meandering stripes, operated in the 2 to 4.2 K temperature range, and known for ultrafast and efficient detection of visible to nearinfrared photons with almost negligible dark counts. Our latest devices are pigtailed structures with coupling between the SSPD structure and a single-mode optical fiber achieved using a micromechanical photoresist ring placed directly over the meander. The above arrangement withstands repetitive thermal cycling between liquid helium and room temperature, and we can reach the coupling efficiency of up to ~33%. The system quantum efficiency, measured as the ratio of the photons counted by SSPD to the total number of photons coupled into the fiber, in our early devices was found to be around 0.3 % and 1% for 1.55 µm and 0.9 µm photon wavelengths, respectively. The photon counting rate exceeded 250 MHz. The receiver with two SSPDs, each individually biased, was placed inside a transport, 60-liter liquid helium Dewar, assuring uninterrupted operation for over 2 months. Since the receiver's optical and electrical connections are at room temperature, the set-up is suitable for any applications, where single-photon counting capability and fast count rates are desired. In our case, it was implemented for photon correlation experiments. The receiver response time, measured as a second-order photon cross-correlation function, was found to be below 400 ps, with timing jitter of less than 40 ps.

show abstract