Generation of optical signal and terahertz idler photons by spontaneous parametric down-conversion

Китаева, Г. Х.; Kornienko, V. V.; Leontyev, A. A.; Shepelev, A. V.

doi:10.1103/physreva.98.063844

Cited by 30 publications

(11 citation statements)

References 30 publications

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“…Parametric down-conversion in bulk 0.9 cm Mg:LiNbO 3 crystal was excited in type-0 geometry. According to phase-matching conditions, the photons of ~1 THz frequency were most effectively generated in this sample at polar angles

with respect to pump direction [ 4 , 10 ]. THz part of PDC radiation was extracted from the crystal through its side face in immediate proximity to the pump beam [ 5 ].…”

Section: Methodsmentioning

confidence: 99%

“…Nowadays, a new direction in terahertz science begins, aimed to extend quantum optical technologies to the terahertz frequency range (THz) [ 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 , 9 , 10 , 11 ]. Currently developed for the optical range, the methods of quantum field sensing [ 12 , 13 , 14 ], imaging [ 15 , 16 ], spectroscopy [ 17 , 18 ], and calibration [ 19 , 20 ] potentially can have great prospects in THz.…”

Section: Introductionmentioning

confidence: 99%

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Towards Measuring Terahertz Photon Statistics by a Superconducting Bolometer

Prudkovskii

Leontyev

Кузнецов

et al. 2021

Sensors

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Statistical distributions of the analog readings of an antenna-coupled THz superconducting bolometer were measured and analyzed under a special type of irradiation by low-energy fluxes of THz photons with Poisson photon statistics and controllable mean photon numbers. The photons were generated via low-gain parametric down-conversion in pulse-pumped Mg:LiNbO3 crystal placed to a cooled cryostat together with the bolometer NbN film. Results of theoretical approximation of experimental histograms reveal the discrete nature of THz detection by superconducting bolometers and open a way for studying their quantum characteristics. It is shown that bolometer readings per pulse consist of discrete counts (“single charges”), with the mean number linearly dependent on the number of input photons. Contributions of single counts to a total analog reading are statistically distributed according to the normal law, with average values slightly depending on the number of counts in each reading. A general formula is proposed to describe the relationship between continuous statistical distribution of the bolometer readings and discrete quantum statistics of the incident photons.

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with respect to pump direction [ 4 , 10 ]. THz part of PDC radiation was extracted from the crystal through its side face in immediate proximity to the pump beam [ 5 ].…”

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Towards Measuring Terahertz Photon Statistics by a Superconducting Bolometer

Prudkovskii

Leontyev

Кузнецов

et al. 2021

Sensors

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“…In the extreme light regime this method has been applied as well. Kitaeva et al [57,63] apply this method to the creation of photon pairs with the signal in the visible and the idler in the terahertz range. The effects of thermal photons and absorption in the terahertz range were included.…”

Section: Simulation Of Spdc Sourcesmentioning

confidence: 99%

Quantum Sensing with Extreme Light

et al. 2022

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Optical nonlinear conversion processes are ubiquitously applied to scientific as well as industrial tasks. In particular, nonlinear processes are employed to generate radiation in many frequency ranges. In plenty of these nonlinear processes, the generation of paired photons occurs -the so-called signal and idler photons. Although this type of generation has undergone a tremendous development over the last decades, either the generated signal or the idler radiation has been used experimentally. In contrast, novel quantum-based measurement principles enable the usage of both partners of the generated photon pairs based on their correlation. These measurement approaches have an enormous potential for future applications, as they allow to transfer information from one spectral range to another. In particular, spectral ranges where photon generation and detection is particularly challenging can benefit from this principle. Above all, these include the extreme frequency ranges, such as on the low-frequency side the mid to far infrared or even the terahertz spectral range, but also on the high-frequency side the ultraviolet or X-ray spectral range. In this review article, theoretical and experimental developments based on correlated biphotons are described specifically for the extreme spectral regions.

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“…In addition, proper spectral engineering of PDC sources allows the creation of correlated photons of different colours. During the last decade, the realisation of such non-degenerate PDC sources with specific spectral features has become widespread [30][31][32][33], while their application in interference systems such as Hong-Ou-Mandel [34] and nonlinear Mach-Zehnder interferometers [33] seems to be very promising.…”

Section: Introductionmentioning

confidence: 99%

Two-Colour Spectrally Multimode Integrated SU(1,1) Interferometer

Ferreri

Sharapova

2022

Symmetry

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Multimode integrated interferometers have great potential for both spectral engineering and metrological applications. However, the material dispersion of integrated platforms constitutes an obstacle that limits the performance and precision of such interferometers. At the same time, two-colour nonlinear interferometers present an important tool for metrological applications, when measurements in a certain frequency range are difficult. In this manuscript, we theoretically developed and investigated an integrated multimode two-colour SU(1,1) interferometer operating in a supersensitive mode. By ensuring the proper design of the integrated platform, we suppressed the dispersion, thereby significantly increasing the visibility of the interference pattern. The use of a continuous wave pump laser provided the symmetry between the spectral shapes of the signal and idler photons concerning half the pump frequency, despite different photon colours. We demonstrate that such an interferometer overcomes the classical phase sensitivity limit for wide parametric gain ranges, when up to 3×104 photons are generated.

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Generation of optical signal and terahertz idler photons by spontaneous parametric down-conversion

Cited by 30 publications

References 30 publications

Towards Measuring Terahertz Photon Statistics by a Superconducting Bolometer

Towards Measuring Terahertz Photon Statistics by a Superconducting Bolometer

Quantum Sensing with Extreme Light

Two-Colour Spectrally Multimode Integrated SU(1,1) Interferometer

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