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arXiv:1707.02666 · Physical Review A

Room-temperature photon-number-resolved detection using a two-mode squeezer

Elisha S. Matekole, Deepti Vaidyanathan, Kenji W. Arai, Ryan T. Glasser, Hwang Lee, Jonathan P. Dowling

Published Nov 7, 2017• 3 citations
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Abstract

We study the average intensity-intensity correlations signal at the output of a two-mode squeezing device with $|N\ensuremath{\rangle}\ensuremath{\bigotimes}|\ensuremath{\alpha}\ensuremath{\rangle}$ as the two input modes. We show that the input photon number can be resolved from the average intensity-intensity correlations. In particular, we show jumps in the average intensity-intensity correlations signal as a function of input photon number $N$. Therefore, we propose that such a device may be deployed as a photon-number-resolving detector at room temperature with high efficiency.

DOI
10.1103/physreva.96.053815

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We study the average intensity-intensity correlations signal at the output of a two-mode squeezing device with ∣N\ensuremath⟩\ensuremath⨂∣\ensuremathα\ensuremath⟩|N\ensuremath{\rangle}\ensuremath{\bigotimes}|\ensuremath{\alpha}\ensuremath{\rangle}∣N\ensuremath⟩\ensuremath⨂∣\ensuremathα\ensuremath⟩ as the two input modes. We show that the input photon number can be resolved from the average intensity-intensity correlations. In particular, we show jumps in the average intensity-intensity correlations signal as a function of input photon number NNN. Therefore, we propose that such a device may be deployed as a photon-number-resolving detector at room temperature with high efficiency.
We study the average intensity-intensity correlations signal at the output of a two-mode squeezing device with |𝑁⟩ ⊗ |𝛼⟩ as the two input modes. We show that the input photon-number can be resolved from the average intensity-intensity correlations. In particular, we show jumps in the average intensity-intensity correlations signal as a function of input photon-number N. Therefore, we propose that such a device may be deployed as photon-number-resolving detector at room temperature with high efficiency.
We study the average coincidence-count signal at the output of a two-mode squeezing device with ∣N⟩⊗∣α⟩|N\rangle\otimes|\alpha\rangle∣N⟩⊗∣α⟩ as the two input modes. We show that the input photon-number can be resolved from the average coincidence counts. In particular, we show jumps in the average coincidence-count signal as a function of input photon-number NNN. Therefore, we propose that such a device may be deployed as photon-number-resolving detector at room temperature with high efficiency.
This work is devoted to the development of novel photon-detector models at room temperature using quantum optics elements. This work comprises of two photon-number-resolving detector (PNRD) models, and the application of PNRD in LIDAR. The first model is based on using a two-mode squeezing device to resolve photon number at room temperature. In this model we study the average intensity-intensity correlations signal at the output of a two-mode squeezing device with |N> and |α> as the two input modes. We show that the input photon-number can be resolved from the average intensity-intensity correlations. In particular, we show jumps in the average intensity-intensity correlations signal as a function of input photon-number N. Therefore, we propose that such a device may be deployed as photon-number-resolving detector at room temperature with high efficiency. In the second model we study the atom-vapor based PNRD from first principles, including quantum mechanical treatment of the electromagnetic field. We analyze a photon detector model that combines coherently controlled absorption of light and resonance fluorescence to achieve photon counting at room temperature. In particular we identify the fundamental limits to this particular scheme of photon detection. We show that there exists a time-energy uncertainty between the incident pulse strength and the time period of the incident pulse. We verify the role of a large ensemble of atoms in boosting the efficiency of such a detector. Lastly, we show the application of PNRD technique to enhance laser range finding and light detection and ranging. We present a technique that improves the signal-to-noise-ratio (SNR) of range-finding, sensing, and other light-detection applications. The technique filters out low photon numbers using PNRD. This technique has no classical analog and cannot be achieved with classical detectors. We investigate the properties of our technique and show under what conditions the scheme surpasses the classical SNR. Finally, we simulate the operation of a rangefinder, showing improvement with a low number of signal samplings and confirming the theory with a high number of signal samplings.
We report the development of a photon-number-resolving detector based on a fiber-optical setup and a pair of standard avalanche photodiodes. The detector is capable of resolving individual photon numbers and operates on the well-known principle by which a single-mode input state is split into a large number (eight) of output modes. We reconstruct the photon statistics of weak coherent input light from experimental data and show that there is a high probability of inferring the input photon number from a measurement of the number of detection events on a single run.
High-dimensional encoding in time-frequency and photon-number degrees of freedom promises photon-efficient quantum communication, but requires detectors that are both temporal-mode selective and photon-number resolving. Here we demonstrate time-correlated single-photon detection combining both capabilities. A train of shaped pump pulses drives quantum frequency up-conversion to select a chosen temporal mode, and the converted photons are counted with a photon-number-resolving detector. Applying to a photon-pair source by spontaneous parametric downconversion into signal and idler bands, we demonstrate direct sampling of the high-dimensional correlated quantum states on compound time-frequency and photon number bases. Our measurements show that the up-converted photons in each band exhibit thermal photon-number statistics, indicating strong single-mode selection. We reconstruct joint temporal intensities conditioned on one and two photon pairs, revealing signal-idler correlations in both time-frequency and photon number. Together, these results establish a unified technology framework linking high-dimensional quantum correlations, mode-selective photon measurement, and photon-number resolved detection. This approach provides a route to characterizing multimode photon-pair sources and to larger time-frequency and photon-number alphabets for high-dimensional quantum communication and information processing.