Back action in quantum electro-optic sampling of electromagnetic vacuum fluctuations

Guedes, Thiago L. M.; Vakulchyk, I.; Seletskiy, Denis V.; Leitenstorfer, Alfred; Moskalenko, A. S.; Burkard, Guido

doi:10.1103/physrevresearch.5.013151

Cited by 4 publications

(2 citation statements)

References 36 publications

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“…In the above derivation, we have neglected the back‐action effect of the χ (3) interaction on the co‐propagating THz field

\hat{E}_\text{T}

. [ 36 ] That is appropriate if the first term on the right‐hand side of Equation () represents a small correction to the second term and is in accordance with our evaluation of the variance signals.…”

Section: Generation Of the Tfish And Lo Fieldsmentioning

confidence: 99%

Self‐Referenced Subcycle Metrology of Quantum Fields

Gündoğdu

Virally

Scaglia

et al. 2023

Laser & Photonics Reviews

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A new time‐domain method for subcycle metrology of quantum electric fields using a combination of a third order nonlinear optical process and homodyne detection with a local oscillator (LO) field is proposed and analyzed. The new method enables isolation of intrinsically weak quantum noise contribution by subtraction of the shot noise of the LO on a pulse‐by‐pulse basis. Together with the centro‐symmetric character of the nonlinearity, this method unlocks novel opportunities toward terahertz and mid‐infrared quantum field metrologies.

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“…In the above derivation, we have neglected the back‐action effect of the χ (3) interaction on the co‐propagating THz field

\hat{E}_\text{T}

Section: Generation Of the Tfish And Lo Fieldsmentioning

confidence: 99%

Self‐Referenced Subcycle Metrology of Quantum Fields

Gündoğdu

Virally

Scaglia

et al. 2023

Laser & Photonics Reviews

Self Cite

View full text Add to dashboard Cite

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“…In order to improve the accuracy of quantum metrology measurements based on electro-optic sampling, a strong confinement of the probing radiation in both space and time is needed. However, the presence of a strong local probing electric field will influence the measured electromagnetic state through quantum back-action [21] as well as lead to the appearance of competing higher-order nonlinear phenomena. In fact, in a recent theoretical work [22], the higher order nonlinear mixing of the electromagnetic radiation studied with the local probing laser field has been proposed in combination with homodyne detection as an alternative method for quantum noise distribution measurements with efficient background suppression.…”

Section: Introductionmentioning

confidence: 99%

Third order nonlinear correlation of the electromagnetic vacuum at near-infrared frequencies

Settembrini,

Herter,

Faist

2024

New J. Phys.

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In recent years, electro-optic sampling, which is based on Pockel’s effect between an electromagnetic mode and a copropagating, phase-matched ultrashort probe, has been largely used for the investigation of broadband quantum states of light, especially in the mid-infrared and terahertz frequency range. The use of two mutually delayed femtosecond pulses at near-infrared frequencies allows the measurement of quantum electromagnetic radiation in different space-time points. Their correlation allows therefore direct access to the spectral content of a broadband quantum state at THz frequencies after Fourier transformation. In this work, we will prove experimentally and theoretically that when using strongly focused coherent ultrashort probes, the electro-optic sampling technique can be affected by the presence of a third-order nonlinear mixing of the probes' electric field at near-infrared frequencies. Moreover, we will show that these third-order nonlinear phenomena can also influence correlation measurements of the quantum electromagnetic radiation. We will prove that the four-wave mixing of the coherent probes' electric field with their own electromagnetic vacuum at near-infrared frequencies results in the generation of a higher-order nonlinear correlation term. The latter will be characterized experimentally, proving its local nature requiring the physical overlap of the two probes. The parameters regime where higher order nonlinear correlation results predominant with respect to electro-optic correlation of terahertz radiation is provided.

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