Experimental study of photon-echo size in optically thick media

Wang, Tsaipei; Greiner, C.; Bochinski, Jason; Mossberg, T. W.

doi:10.1103/physreva.60.r757

Cited by 23 publications

(27 citation statements)

References 31 publications

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“…Yb satisfies ideally this condition (no superfine structure due to zero nuclear spin); in addition, it is in resonance with Rhodamine 110 dye laser radiation at 555.56 nm, and a number of modern research is made in ytterbium vapor [5,6].…”

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confidence: 91%

Polarization rotation of photon echo at J = 0 ↔ 1 transition in magnetic field

et al. 2003

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Detailed experimental analysis of photon echo polarization in a longitudinal magnetic field is performed for the first time at the simplest quantum transition J = 1 ↔ J = 0 for which the non-Faraday rotation of photon echo polarization plane was predicted. The echo was generated at the intercombination transition (6s6p) 3 P1 → (6s 2 ) 1 S0 of 174 Yb by two resonant laser pulses of linear (parallel or mutually orthogonal) polarization, and the angled echo optical scheme was applied for the detection. At the magnetic field strength B ≤ 5 G the photon echo has polarization very close to linear one; its polarization plane rotates around magnetic field vector, and photon echo polarization components and integral echo power oscillate versus B from its maximum value to zero, in agreement with theory. At a stronger magnetic field B ∼ 40 G photon echo power oscillations disappear, no preferable orientation of polarization vector is observed; the fluctuations of exciting radiation spectrum are supposed to be responsible for this "non-polarized" echo. Photon echo and its numerous modifications are known for their capabilities to store and to reproduce the optical information [1,2] in the analogous or in the digital form. The present growing interest to this phenomenon is due to the principal ability of photon echo to reproduce a quantum state of light, in particular a single-photon wavepacket [3], which is very important for the quantum computer modelling on the base of entangled states of photons polarizations. In this respect, the research of photon echo polarization acquires new sounding.Present work is performed in the search of nonFaraday rotation of photon echo polarization in the presence of a longitudinal magnetic field. The simplest type of optical transition for which this effect exists (and for which it was predicted firstly [4]) corresponds to the angular mo-Yb satisfies ideally this condition (no superfine structure due to zero nuclear spin); in addition, it is in resonance with Rhodamine 110 dye laser radiation at 555.56 nm, and a number of modern research is made in ytterbium vapor [5,6].Theoretical analysis of photon echo polarization rotation in magnetic field [7,8] predicts the oscillations of the integral echo power versus field strength for any angular momenta and for any type of spectral transition. However, the total photon echo power oscillations of highest contrast, from maximum to zero, are predicted for J = 1 ↔ J = 0 transition exclusively. According to analytical calculations [8], which were performed for an arbitrary area of exciting pulses (this is very important because of possi-

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confidence: 91%

Polarization rotation of photon echo at J = 0 ↔ 1 transition in magnetic field

et al. 2003

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“…On the other hand, if the absorption is high the data sequence will be efficiently absorbed, but an efficient rephasing sequence using a % pulse will invert the atomic medium and render it amplifying. It is then possible to generate echoes that are more intense than the data pulse [88][89][90]. However, the unavoidable amplified spontaneous emission generated in such a medium would add noise to the output echo field, making this approach inappropriate for quantum state storage.…”

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confidence: 99%

Photon‐echo quantum memory in solid state systems

Tittel¹,

Afzelius

Chanelière

et al. 2010

Laser & Photonics Reviews

432

418

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Many applications of quantum communication crucially depend on reversible transfer of quantum states between light and matter. Motivated by rapid recent developments in theory and experiment, we review research related to quantum memory based on a photon-echo approach in solid state material with emphasis on use in a quantum repeater. After introducing quantum communication, the quantum repeater concept, and properties of a quantum memory required to be useful in a quantum repeater, we describe the historical development from spin echoes, discovered in 1950, to photon-echo quantum memory. We present a simple theoretical description of the ideal protocol, and comment on the impact of a non-ideal realization on its quantum nature. We extensively discuss rare-earth-ion doped crystals and glasses as material candidates, elaborate on traditional photon-echo experiments as a test-bed for quantum state storage, and describe the current state-of-the-art of photon-echo quantum memory. Finally, we give a brief outlook on current research.The picture shows a Europium doped Y2SiO5 crystal surrounded by electrodes in the setup used for the first proof-of-principle demonstration of the novel, photon-echo based quantum memory protocol.

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“…However, in the conventional two-level photon echo scheme [5] the reconstructed field is absorbed as it propagates in the sample, and although the state could be correctly mapped onto the atomic ensemble if the sample has a high optical density, it can be only partly extracted. In fact, the output signal intensity in a conventional photon echo experiment is typically only a few percent of the input field intensity (however, the experiment can be configured such that the sample coherently amplifies the output signal such that it becomes stronger than the input signal [11]). In comparison with quantum state mapping using slow light and EIT [2] we use the same energy level diagram configuration, but instead of causing the sample to be transparent through EIT we just time reverse the absorption process.…”

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confidence: 99%