Two Photon Absorption and Coherent Control with Broadband Down-Converted Light

Dayan, Barak; Pe'er, Avi; Friesem, Asher A.; Silberberg, Yaron

doi:10.1103/physrevlett.93.023005

Cited by 238 publications

(264 citation statements)

References 26 publications

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“…In section III.C.1, we will further show that for off-resonant intermediate state(s) e -as is the case in most experimental studies to date (Dayan et al, 2004Guzman et al, 2010;Harpham et al, 2009;Lee and Goodson, 2006;Upton et al, 2013) -the two signals carry the same information.…”

Section: Two-photon Absorption Vs Two-photon-induced Fluorescencementioning

confidence: 74%

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Nonlinear optical signals and spectroscopy with quantum light

2016

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Conventional nonlinear spectroscopy uses classical light to detect matter properties through the variation of its response with frequencies or time delays. Quantum light opens up new avenues for spectroscopy by utilizing parameters of the quantum state of light as novel control knobs and through the variation of photon statistics by coupling to matter. We present an intuitive diagrammatic approach for calculating ultrafast spectroscopy signals induced by quantum light, focusing on applications involving entangled photons with nonclassical bandwidth properties -known as "time-energy entanglement". Nonlinear optical signals induced by quantized light fields are expressed using time ordered multipoint correlation functions of superoperators in the joint field plus matter phase space. These are distinct from Glauber's photon counting formalism which use normally ordered products of ordinary operators in the field space. One notable advantage for spectroscopy applications is that entangled photon pairs are not subjected to the classical Fourier limitations on the joint temporal and spectral resolution. After a brief survey of properties of entangled photon pairs relevant to their spectroscopic applications, different optical signals, and photon counting setups are discussed and illustrated for simple multi-level model systems.

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Section: Two-photon Absorption Vs Two-photon-induced Fluorescencementioning

confidence: 74%

“…With entangled photons, such signals scale linearly (Dayan et al, 2004Friberg et al, 1985;Georgiades et al, 1995;Javanainen and Gould, 1990). This allows to carry out microscopy and lithography (Boto et al, 2000) applications at much lower photon fluxes.…”

Section: Introductionmentioning

confidence: 99%

Nonlinear optical signals and spectroscopy with quantum light

2016

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“…Studies in this direction are important, first of all, from the viewpoint of the fundamental question: how well can we localize a photon of a correlated pair if its twin is registered at a certain time? Furthermore, two-photon wavepackets with small correlation times are required for quantum technology applications involving interactions between matter and nonclassical light [1][2][3][4][5], as well as for quantum metrology applications [6]. Several ideas have been suggested for generating twophoton states with broad spectra, all based on Spontaneous Parametric Down Conversion (SPDC).…”

Section: Introductionmentioning

confidence: 99%

Biphoton compression in a standard optical fiber: Exact numerical calculation

et al. 2010

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Generation of two-photon wavepackets, produced by spontaneous parametric down conversion in crystals with linearly chirped quasi-phase matching grating, is analyzed. Although being spectrally broad, two-photon wavepackets produced this way are not Fourier transform limited. In the paper we discuss the temporal compression of the wavepackets, exploiting the insertion of a standard optical fiber in the path of one of the two photons. The effect is analyzed by means of full numerical calculation and the exact dispersion dependencies in both the crystal and the fiber are considered. The study opens the way to the practical realization of this idea.

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“…Consequently, homodyne detection of the SFG phase against the original pump measures the inter-mode phase correlation regardless of their separation. The detection bandwidth with SFG is therefore only limited by phase matching, which can be very broad for type-I phase matching [7,8,15], as shown in figure 2.…”

mentioning

confidence: 99%

“…The signal and the idler are driven by classical pumps E = |E|e −iφ and E * that are complex conjugates to reflect the classical correlation between them [6,7,9].…”

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confidence: 99%

Sum-frequency generation as a detector of high-power two-mode squeezing

Shikerman

Pe'er

2013

Phys. Rev. A

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We introduce sum-frequency generation (SFG) as an effective physical two-photon detector for high power two-mode squeezed coherent states with arbitrary frequency separation, as produced by parametric oscillators well above the threshold. Using a formalism of "collective modes", we describe both two-mode squeezing and degenerate squeezing on equal footing and derive simple relations between the input degree of squeezing and the measured SFG quadrature noise. We compare the proposed SFG detection to standard homodyne measurement, and show advantages in robustness to detection inefficiency (loss of SFG photons) and acceptance bandwidth.PACS numbers: 42.50. Dv, 42.50.St, 42.65.Lm, 42.65.Ky Quantum mechanical squeezing -the reduction of fluctuations of an observable below the standard quantum limit (SQL -1/ √ N , N the total number of photons detected) at the expense of increased fluctuations of the conjugate observable -is a major resource in quantum information and quantum measurement. In optics, squeezed states of light are key to methods of phase measurement with precision beyond SQL, approaching the ultimate Heisenberg limit 1/N [1, 2]. Due to the potential for a dramatic improvement in precision, sub-SQL methods are appealing for metrology applications, such as detection of gravitational waves [3], precision spectroscopy [4] and next generation atomic clocks [5].Two major limitations exist for measurement of squeezing by standard homodyne detection. The first is sensitivity to photo-detection inefficiency, which reduces the usable squeezing. Since squeezing is very sensitive to photon loss, and since detection inefficiency in standard homodyne is indistinguishable from loss, near unity detection efficiency is crucial to exploit the squeezing resource [11,12]. Another limitation of homodyne detection is detection bandwidth -while parametric downconversion (PDC) can produce two-mode squeezed states with arbitrary frequency separation, the photo detectors bandwidth is restricted to several GHz at most. Consequently, standard homodyne detection is effective only for narrowband degenerate squeezing and cannot be used for two-mode or broadband squeezing, especially above the oscillation threshold. Detection of the phase correlation in two-mode squeezing requires a stable reference for the phase-sum, which is not easy to obtain for spectrallyseparated mode pairs. Reports so far relied on delicate referencing to optical cavities and were limited to few nanometer separation between the modes [10].We suggest a simple method to detect high-power twomode squeezing, as produced by parametric oscillators above threshold [10,13,14]. The method, shown in Fig. 1, utilizes sum-frequency generation (SFG) as a detector of quantum correlation that is robust to detection inefficiency and accepts arbitrary frequency separation between the two modes. Previously, SFG was explored as an ultra-broadband two-photon detector in the FIG. 1: (Color online) (a) The proposed SFG scheme for measurement of squeezing: a narrowband pump local ...

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Two Photon Absorption and Coherent Control with Broadband Down-Converted Light

Cited by 238 publications

References 26 publications

Nonlinear optical signals and spectroscopy with quantum light

Nonlinear optical signals and spectroscopy with quantum light

Biphoton compression in a standard optical fiber: Exact numerical calculation

Sum-frequency generation as a detector of high-power two-mode squeezing

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