Cancellation of dispersion and temporal modulation with nonentangled frequency-correlated photons

Torres-Company, Víctor; Valencia, Alejandra; Hendrych, Martin; Torres, Juan P.

doi:10.1103/physreva.83.023824

Cited by 10 publications

(9 citation statements)

References 26 publications

(50 reference statements)

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“…This is closely related to the demonstration of the possibility of using thermal (or pseudothermal), and thus nonentangled, radiation for two-photon imaging experiments [41]. As was demonstrated in [15], entangled and non-entangled sources can show strikingly similar behaviors when traversing the same optical system, characterized by a particular transfer function, provided that certain properties of the frequency correlations between photons are the same for both sources.…”

Section: Discussionmentioning

confidence: 52%

“…In dispersion cancelation, an effect that is observed in the temporal domain, namely the broadening of the second-order correlation function of paired photons propagating in two different optical fibers, it was shown that it can be suppressed, provided that the group velocity dispersion parameters of both fibers are identical but opposite in sign, and the photons are entangled [12][13][14]. However, it has recently been demonstrated that such effects could also be produced by frequency-correlated photons, which nonetheless might be non-entangled [15,16].…”

Section: Introductionmentioning

confidence: 99%

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Role of the spectral shape of quantum correlations in two-photon virtual-state spectroscopy

et al. 2013

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The true role of entanglement in two-photon virtual-state spectroscopy (Saleh et al 1998 Phys. Rev. Lett. 80 3483), a two-photon absorption spectroscopic technique that can retrieve information about the energy level structure of an atom or a molecule, is controversial. The consideration of closely related techniques, such as multidimensional pump-probe spectroscopy (Roslyak et al 2009 Phys. Rev. A 79, 063409), suggests that spectroscopic information might also be retrieved by using uncorrelated pairs of photons. Here we show that this is not the case. In the two-photon absorption process, the ability to obtain information about the energy level structure of a medium depends on the spectral shape of existing temporal (frequency) correlations between the absorbed photons. In fact, it is a combination of both the presence of frequency correlations (entanglement) and their specific spectral shape that makes the

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Section: Discussionmentioning

confidence: 52%

Section: Introductionmentioning

confidence: 99%

Role of the spectral shape of quantum correlations in two-photon virtual-state spectroscopy

et al. 2013

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“…This is the case, for instance, of two-photon lithography [26,27] and remote dispersion and temporal modulation cancellation [18,22,28,29]. In all these cases, classical and quantum sources share the same enabling characteristics (certain frequency correlations) that allow us the sought-after observation.…”

Section: Fig 1 (Color Online) (A)mentioning

confidence: 99%

“…Alternatively, a full quantum formalism might be used instead [18]. Let us consider the scheme of Fig.…”

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confidence: 99%

Shaping the Ultrafast Temporal Correlations of Thermal-Like Photons

2012

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We show that the temporal correlations between two light beams arising from a broadband thermal-like source can be controlled in the femtosecond regime. Specifically, by introducing spectral phase-only masks in the path of one of the beams, we show that the timing and strength of the photon correlations can be programmed on demand. This example demonstrates that the interbeam second-order coherence function propagates as a phase-sensitive ultrafast wave packet in the path towards the detectors, and is thus, susceptible to be modified by acting on just one of the beams. For quite some time, it has been thought that this could only happen with sources showing time-energy entanglement. Our work shows that such a property is due to the existence of a certain type of correlation, but not necessarily the entanglement. Introduction.-The statistical properties of broadband light sources play a key role in understanding the physics behind their emission mechanisms. The theory of optical coherence provides a convenient mathematical framework to account for these stochastic effects by means of a hierarchy of correlation (or coherence) functions [1,2]. The first-order coherence function quantifies the electric field correlations of the source and is used to describe the field superposition effects that appear in the most common interferometers. In the temporal domain, the interference effects of broadband light sources can easily be controlled on demand, thanks to the availability of programmable pulse shapers [3]. Conversely, the measurement of the first-order correlation function yields invaluable information about the interaction of light with matter, and it lies at the heart of some of the most popular bioimaging tools such as optical coherence tomography [4] or spectral endoscopy [5], just to name a few.The second-order correlation function [1,2] provides a unique fingerprint of the fundamental properties of any radiation source. For example, for thermal-like light sources, this quantity explains why it is twice more probable to detect two photons in coincidence when single-photon detectors are located equidistantly from the source than in any other situation. This effect was first observed in the spatial domain by the groundbreaking experiments of Hanbury Brown and Twiss (HBT) [6]. They showed that the coherence area was related to the angular size of the radiation source [7]. Interestingly, a similar effect also appears in the temporal domain [8], i.e., for thermal-like sources, the photons appear correlated for time instants shorter than the inverse of the bandwidth of the source. On the contrary, for

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“…One approach that has proven fruitful for developing classical analogs of quantum technologies [24][25][26][27][28] is that of time reversal [12,[29][30][31]. Under this transformation, downconversion, which is exclusively quantum mechanical, can be replaced by second-harmonic generation, which is a classical process.…”

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confidence: 99%

Classical analog for dispersion cancellation of entangled photons with local detection

et al. 2011

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Energy-time entangled photon pairs remain tightly correlated in time when the photons are passed through equal magnitude, but opposite in sign, dispersion. A recent experimental demonstration has observed this effect on ultrafast time scales using second-harmonic generation of the photon pairs. However, the experimental signature of this effect does not require energy-time entanglement. Here, we demonstrate a direct analogue to this effect in narrow-band second-harmonic generation of a pair of classical laser pulses under similar conditions. Perfect cancellation is observed for fs pulses with dispersion as large as 850 fs 2 , comparable to the quantum result, but with an 10 13 -fold improvement in signal brightness.

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Cancellation of dispersion and temporal modulation with nonentangled frequency-correlated photons

Cited by 10 publications

References 26 publications

Role of the spectral shape of quantum correlations in two-photon virtual-state spectroscopy

Role of the spectral shape of quantum correlations in two-photon virtual-state spectroscopy

Shaping the Ultrafast Temporal Correlations of Thermal-Like Photons

Classical analog for dispersion cancellation of entangled photons with local detection

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