| | |
| | |
Stat |
Members: 3643 Articles: 2'487'895 Articles rated: 2609
28 March 2024 |
|
| | | |
|
Article overview
| |
|
Superconducting nanowire single-photon imager | Qing-Yuan Zhao
; Di Zhu
; Niccolò Calandri
; Andrew E. Dane
; Adam N. McCaughan
; Francesco Bellei
; Hao-Zhu Wang
; Daniel F. Santavicca
; Karl K. Berggren
; | Date: |
27 May 2016 | Abstract: | Detecting spatial and temporal information of individual photons is a crucial
technology in today’s quantum information science. Among the existing
single-photon detectors, superconducting nanowire single-photon detectors
(SNSPDs) have been demonstrated with a sub-50 ps timing jitter, near unity
detection efficiency1, wide response spectrum from visible to infrared and ~10
ns reset time. However, to gain spatial sensitivity, multiple SNSPDs have to be
integrated into an array, whose spatial and temporal resolutions are limited by
the multiplexing circuit. Here, we add spatial sensitivity to a single nanowire
while preserving the temporal resolution from an SNSPD, thereby turning an
SNSPD into a superconducting nanowire single-photon imager (SNSPI). To achieve
an SNSPI, we modify a nanowire’s electrical behavior from a lumped inductor to
a transmission line, where the signal velocity is slowed down to 0.02c (where c
is the speed of light). Consequently, we are able to simultaneously read out
the landing locations and arrival times of the photons from the output
electrical pulses using only two connections. We have demonstrated
single-photon imaging by using a 19.7 mm long SNSPI, which is meandered into an
imaging area of 286 {mu}m*193 {mu}m. The nanowire has a temporal resolution
of 50 ps for detecting 1.5 {mu}m photons. The 2D spatial resolution is 13.0
{mu}m in the vertical direction and 5.6 {mu}m in the horizontal direction.
The maximum number of resolvable locations (i.e., the effective number of
pixels) in such a long nanowire is calculated to be 590. Rather than operating
an individual detector in a scanning mode or using SPD arrays, this SNSPI gives
an alternative approach to taking large-scale single-photon images and
measuring temporal and spatial correlation. | Source: | arXiv, 1605.8693 | Services: | Forum | Review | PDF | Favorites |
|
|
No review found.
Did you like this article?
Note: answers to reviews or questions about the article must be posted in the forum section.
Authors are not allowed to review their own article. They can use the forum section.
browser claudebot
|
| |
|
|
|
| News, job offers and information for researchers and scientists:
| |