Electromagnetically-induced-transparency-based paired photon generation

Kolchin, Pavel

doi:10.1103/physreva.75.033814

Cited by 88 publications

(86 citation statements)

References 23 publications

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“…The generation rate of paired photons is about 2 × 10 5 pairs per second, with a ratio of paired to anti-Stokes photons of about 75%. These results are in agreement with theory [17,18] and no longer exhibit the discrepancy reported in [17,20,23]. With τ as the relative delay between Stokes and antiStokes detection times t 1 and t 2 respectively, and T b as the bin width, the Glauber correlation function is related to the coincidence rate, R c (τ ) by G (2) …”

Section: Eo Light Modulatorsupporting

confidence: 80%

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Electro-Optic Modulation of Single Photons

et al. 2008

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We use the Stokes photon of a biphoton pair to set the time origin for electro-optic modulation of the wave function of the anti-Stokes photon thereby allowing arbitrary phase and amplitude modulation. We demonstrate conditional single-photon wave functions composed of several pulses, or instead, having gaussian or exponential shapes.PACS numbers: 42.50. Gy, 32.80.Qk, 42.50.Ex, 42.65.Lm This letter demonstrates how single photons may be modulated so as to produce photon wave functions whose amplitude and phase are functions of time. The essential feature of this work is the use of one photon of a biphoton pair that is generated by spontaneous parametric down-conversion to establish the time origin for the modulation of the second photon. This is done by using electromagnetically induced transparency and slow light to produce time-energy entangled biphotons with pulse lengths of several hundred ns, and therefore, very long as compared to the temporal resolution of single photon counting modules (about 40 ps). Once the time origin is established, the photon waveform may be modulated in the same manner as one modulates a classical pulse of light. For example, the single-photon waveform may be phase, frequency, amplitude, or even digitally modulated, with the maximum modulation frequency limited by the resolution of the detection of the first photon.As shown in Fig. 1, we use cw pump and coupling lasers to generate time-energy entangled pairs of Stokes and anti-Stokes photons that propagate in opposite directions and are collected in single mode fibers. The detection of a Stokes photon at D 1 sets the time origin for firing the function generator that drives the electro-optic modulator (EOM) that modulates the wave function of the anti-Stokes photon. This latter photon is incident on the beam splitter where it is detected by D 2 or D 3 . As shown in the following, we generate single photons whose modulated waveform is two rectangular pulses, is Gaussian or is a time reversed exponential.The method demonstrated in this letter might be used to optimally load a single photon into an optical cavity [1], or instead, to study the transient response of atoms to different single photon waveforms. In the context of light-matter interfaces, it may improve the efficiency of storage and retrieval of single photons in atomic ensembles [2]. For quantum information applications, both amplitude and phase modulators could be used to allow full control over the single photon waveforms. For example, one could a construct a single photon waveform that is a train of identical pulses with information encoded into the relative phase difference between consecutive pulses [3].The generation of single photons with controlled wave- forms has been demonstrated earlier by using the techniques of cavity-QED, i.e., by coupling a single trapped ion to a high Q cavity and using an acousto-optic modulator to shape a pumping laser that is tuned close to the resonant transition [4]. In related work Rempe and colleagues use a single Rb atom, again i...

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Section: Eo Light Modulatorsupporting

confidence: 80%

“…In this work we use the technique of Balic et al [17,18,19] to generate biphotons in a backward wave geometry where the length of the biphoton is determined by the slow group velocity associated with EIT. We first summarize the properties of this type of biphoton light source as recently developed by Du and colleagues [20].…”

Section: Eo Light Modulatormentioning

confidence: 99%

Electro-Optic Modulation of Single Photons

et al. 2008

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“…This requires a detailed study of the impact of such excitation schemes on the phases in the collective excitation. EIT effects during the read pulse may also play a role in such a scenario [11]. EIT in inhomogeneous systems has been studied e.g.…”

Section: Discussionmentioning

confidence: 99%

“…[10], and propagation effects for the Anti-Stokes photon in Ref. [11]. This paper is organized as follows.…”

Section: Introductionmentioning

confidence: 99%

Creating single collective atomic excitations via spontaneous Raman emission in inhomogeneously broadened systems: Beyond the adiabatic approximation

et al. 2009

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The creation of single collective excitations in atomic ensembles via spontaneous Raman emission plays a key role in several quantum communication protocols, starting with the seminal DLCZ protocol [L.-M.Duan, M.D. Lukin, J.I. Cirac, and P. Zoller, Nature 414, 413 (2001).] This process is usually analyzed theoretically under the assumptions that the write laser pulse inducing the Raman transition is far off-resonance, and that the atomic ensemble is only homogeneously broadened. Here we study the impact of near-resonance excitation for inhomogeneously broadened ensembles on the collective character of the created atomic excitation. Our results are particularly relevant for experiments with hot atomic gases and for potential future solid-state implementations.

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“…The frequency domain field operators are governed by the following HeisenbergLangevin coupled equations [34]:…”

Section: General Formulism: Free Spacementioning

confidence: 99%

Narrowband Biphotons: Generation, Manipulation, and Applications

Chuu

2015

Engineering the Atom-Photon Interaction

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In this chapter, we review recent advances in generating narrowband biphotons with long coherence time using spontaneous parametric interaction in monolithic cavity with cluster effect as well as in cold atoms with electromagnetically induced transparency. Engineering and manipulating the temporal waveforms of these long biphotons provide efficient means for controlling light-matter quantum interaction at the single-photon level. We also review recent experiments using temporally long biphotons and single photons.

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Electromagnetically-induced-transparency-based paired photon generation

Cited by 88 publications

References 23 publications

Electro-Optic Modulation of Single Photons

Electro-Optic Modulation of Single Photons

Creating single collective atomic excitations via spontaneous Raman emission in inhomogeneously broadened systems: Beyond the adiabatic approximation

Narrowband Biphotons: Generation, Manipulation, and Applications

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