Cross strip microchannel plate imaging photon counters with high time resolution

Siegmund, Oswald H. W.; Vallerga, J. V.; Tremsin, Anton S.; Stonehill, L. C.; Shirey, Robert; Rabin, Michael W.; Thompson, David C.

doi:10.1117/12.846888

Cited by 7 publications

(3 citation statements)

References 13 publications

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“…9 Here, we have narrowed the correlation window by 30-fold by replacing the ICCD and optical delay line used in previous implementations of wide-field quantum ghost imaging with NCam (Nocturnal Camera). 10,11,12 NCam is a crossed-delay line detector that records the location as well as the arrival time of a detected photon with sub-nanosecond precision. Unlike a camera that integrates photon detections into frames before readout, NCam is an event-based sensor that records event streams.…”

Section: Resultsmentioning

confidence: 99%

Quantum ghost imaging of undisturbed live plants

Ryan,

Meier,

Sandoval

et al. 2024

Label-Free Biomedical Imaging and Sensing (LBIS) 2024

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The near infrared (NIR) and mid-infrared (MIR) spectral regions contain absorption features that can identify specific molecular bonds and chemical species in a sample. For example, lignan and proteins in plants have specific absorption signatures in the NIR. However, because detectors are inefficient in the NIR and MIR, infrared spectroscopy requires high light levels to overcome detector limitations. Cameras in particular do not perform well in this spectral range, and microscopy methods such as Fourier transform infrared spectroscopy (FT-IR) typically rely on scanning confocal arrangements with single-element detectors to spatially map chemical information. To overcome these limitations, we have developed and exploited a new quantum ghost imaging microscope for obtaining absorption measurements in the NIR without the need of scanning or high light intensities. We report on the use of a novel detector-NCam-in quantum ghost imaging using non-degenerate photon pairs generated by spontaneous parametric down conversion (SPDC). NCam records single-photon arrival events with ∼100 ps resolution, enhancing the correlation window of SPDC pairs over previous wide-field ghost imaging by 30-fold. This permits ghost imaging of living and intact plant samples at light levels lower than what the plants would experience from starlight. For photosynthesizing organisms, this low-light imaging method enables the study of plants without disturbing or eliciting responses from the plant due to the measurement itself.

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Section: Resultsmentioning

confidence: 99%

Quantum ghost imaging of undisturbed live plants

Ryan,

Meier,

Sandoval

et al. 2024

Label-Free Biomedical Imaging and Sensing (LBIS) 2024

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“…as the spatially-resolving detector for the signal photons. NCam (Nocturnal Camera) is a photocathode-based imaging device with sub-nanosecond timing resolution [17][18][19][20]. Unlike conventional frame-based cameras or SPAD arrays, NCam is a non-pixelated detector.…”

Section: Resultsmentioning

confidence: 99%

Infrared quantum ghost imaging of living and undisturbed plants

Ryan,

Meier,

Seitz

et al. 2024

Preprint

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Quantum ghost imaging (QGI) is a method that measures absorption images at extremely low light intensities. Non-degenerate QGI probes a sample at one wavelength while forming an image with correlated photons at a different wavelength. This relieves spectral sensitivity requirements on detectors for near-infrared (NIR) imaging and, as a result, less illumination intensity is required. Using NCam, a novel single-photon detector, we demonstrate non-degenerate QGI with unprecedented sensitivity and contrast, obtaining images of living plants with less than 1% light transmission. Plants experience 3 aW/cm2 of light during imaging, orders of magnitude below starlight. This realization of QGI expands the method to extremely low light bioimaging applications and imaging of light sensitive samples.

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“…The crossed-strip (XS) sensor [1][2][3] has been developed to address some of the limitations of the currentgeneration crossed delay line (XDL) sensor. [4][5][6] The operation of both sensors is based on similar principles.…”

Section: Introductionmentioning

confidence: 99%

A photon-counting camera system developed from a crossed-strip detector

et al. 2012

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A crossed-strip detector initially developed at UC Berkeley's Space Sciences Laboratory has been demonstrated as a laboratory benchtop instrument and is now in the process of being integrated by Los Alamos National Laboratory into a portable, real-time, single-photon-counting camera system. The crossed-strip detector consists of 32 anode strips along each of two axes sealed inside a vacuum tube behind a photocathode and a microchannelplate stack. A photon incident on the photocathode produces a cloud of charge from the microchannel plates that falls onto a portion of the 64 anode strips, producing a signal on a subset of channels along each axis and requiring that all anode channels continually be analyzed simultaneously. To maximize the photon flux that can be accepted by the sensor with minimal deadtime, the crossed-strip sensor has been combined with shortershaping-time amplifiers and higher-rate digitizers than previously used. With the ultimate goal of reaching 100 million events per second, FPGA-implementable algorithms have been developed for the identification of pulses on each anode channel and the determination of the pulses' time and amplitude. From the pulse times and amplitudes, a charge cloud can be reconstructed and the centroid determined to produce the time and position of each incident photon. The data-analysis procedure will be discussed, measurements detailing the performance of the camera system as it exists at this point will be presented, and the planned layout of the embedded camera system hardware will be detailed.

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Cross strip microchannel plate imaging photon counters with high time resolution

Cited by 7 publications

References 13 publications

Quantum ghost imaging of undisturbed live plants

Quantum ghost imaging of undisturbed live plants

Infrared quantum ghost imaging of living and undisturbed plants

A photon-counting camera system developed from a crossed-strip detector

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