Excitation of coherent Raman beats in rare earth solids with a bichromatic laser field

Blasberg, Tilo; Suter, Dieter

doi:10.1016/0030-4018(94)90750-1

Cited by 10 publications

(6 citation statements)

References 24 publications

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“…A Λ-system also represents a basic device where, in a simple way, the transition to be excited by the quantum field can be triggered for storage or restitution by an external control field. In the prospect of quantum storage, electromagnetically induced transparency (EIT) protocols involving Λ-type have been studied in praseodymium-doped materials [6,7].It is noteworthy that the essence of Λ-system operation, namely the optical excitation of nuclear spin coherence, has been practised in REIC for almost 30 years [11,12,13,14,15,16], but always in praseodymium-or europium-doped crystals. However, quantum storage demonstration in Pr-or Eudoped compounds is limited by the smallness of their hyperfine structure, not really matching the bandwidth of existing quantum sources.…”

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confidence: 99%

“…It is noteworthy that the essence of Λ-system operation, namely the optical excitation of nuclear spin coherence, has been practised in REIC for almost 30 years [11,12,13,14,15,16], but always in praseodymium-or europium-doped crystals. However, quantum storage demonstration in Pr-or Eudoped compounds is limited by the smallness of their hyperfine structure, not really matching the bandwidth of existing quantum sources.…”

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confidence: 99%

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Optical excitation of nuclear spin coherence in aTm3+:YAGcrystal

Louchet

Bretenaker

et al. 2008

Phys. Rev. B

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A thulium-doped crystal is experimentally shown to be an excellent candidate for broadband quantum storage in a solid-state medium. For the first time, nuclear spin coherence is optically excited, detected and characterized in such a crystal. The lifetime of the spin coherence -the potential storage entity -is measured by means of Raman echo to be about 300 µs over a wide range of ground state splittings. This flexibility, attractive for broadband operation, and well fitted to existing quantum sources, results from the simple hyperfine structure, contrasting with Pr-and Eu-doped crystals.So far, the mapping of a quantum state of light onto an atomic ensemble has been implemented in atomic vapors [1] and cold atom clouds [2]. Because of their long optical coherence lifetimes at low temperature, rare-earth ion-doped crystals (REIC) have been extensively investigated for optical data storage [3] and data processing [4,5]. There has recently been renewed interest in these materials, stimulated by proposals to explore their adequacy to quantum memories [6,7,8,9,10]. To some extent, REIC at low impurity concentration are similar to atomic vapors with the advantage of no atomic diffusion.Most optical quantum memory protocols rely on the transfer of a quantum state of light into a long-lived atomic spin coherence that is free from decoherence via spontaneous emission. This can be achieved in a Λ-type three-level system where two hyperfine or spin sublevels are optically connected to a common upper level. The presence of a Λ-system ensures efficient coupling between light and matter together with long storage times. A Λ-system also represents a basic device where, in a simple way, the transition to be excited by the quantum field can be triggered for storage or restitution by an external control field. In the prospect of quantum storage, electromagnetically induced transparency (EIT) protocols involving Λ-type have been studied in praseodymium-doped materials [6,7].It is noteworthy that the essence of Λ-system operation, namely the optical excitation of nuclear spin coherence, has been practised in REIC for almost 30 years [11,12,13,14,15,16], but always in praseodymium-or europium-doped crystals. However, quantum storage demonstration in Pr-or Eudoped compounds is limited by the smallness of their hyperfine structure, not really matching the bandwidth of existing quantum sources. We recently demonstrated the existence of a Λ-system with adjustable ground state splitting in thuliumdoped YAG [17]. Widely adjustable splitting might help to match the bandwidth of existing quantum sources. In this Letter, for the first time to the best of our knowledge, we optically excite, characterize and detect the nuclear spin coherence in the electronic ground state of a Tm-doped crystal.In crystals doped with Pr 3+ or Eu 3+ , Λ-systems are built on the hyperfine structure of the ground level with a sublevel splitting up to a few tens of MHz. This spacing represents the memory bandwidth. Indeed, the two transitions of the Λ cannot be po...

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confidence: 99%

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Optical excitation of nuclear spin coherence in aTm3+:YAGcrystal

Louchet

Bretenaker

et al. 2008

Phys. Rev. B

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“…The nuclear spin coherence was measured using two-pulse spin echoes. Coherent manipulation on the nuclear spin state was performed with both direct microwave excitation and all-optical excitation with bichromatic Raman pulses [34][35][36][37]. The ions were first initialized into the |1 g state via optical pumping on the |2 g → |1 e transition.…”

Section: Experimental Methodsmentioning

confidence: 99%

Characterization ofYb3+171:YVO4for photonic quantum technologies

et al. 2018

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Rare-earth ions in crystals are a proven solid-state platform for quantum technologies in the ensemble regime and attractive for new opportunities at the single ion level. Among the trivalent rare earths, 171 Yb 3+ is unique in that it possesses a single 4f excited-state manifold and is the only paramagnetic isotope with a nuclear spin of 1/2. In this work, we present measurements of the optical and spin properties of 171 Yb 3+ :YVO 4 to assess whether this distinct energy level structure can be harnessed for quantum interfaces. The material was found to possess large optical absorption compared to other rare-earth-doped crystals owing to the combination of narrow inhomogeneous broadening and a large transition oscillator strength. In moderate magnetic fields, we measure optical linewidths less than 3 kHz and nuclear spin linewidths less than 50 Hz. We characterize the excited-state hyperfine and Zeeman interactions in this system, which enables the engineering of a Λ-system and demonstration of all-optical coherent control over the nuclear spin ensemble. Given these properties, 171 Yb 3+ :YVO 4 has significant potential for building quantum interfaces such as ensemble-based memories, microwave-to-optical transducers, and optically addressable single rareearth-ion spin qubits.

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“…The result is a complete microwave resonance spectrum for each laser wavelength. The projections on the axes represent the conventional EPR and absorption spectra field can be replaced by optical fields, applied to the two electronic transitions, that can excite the spin coherence by another Raman process [41,42,43].…”

Section: Coherent Raman Scatteringmentioning

confidence: 99%

Laser‐Assisted Magnetic Resonance: Principles and Applications

Suter

Gutschank

2007

ChemInform

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Abstract. Laser radiation can be used in various magnetic resonance experiments. This chapter discusses a number of cases, where laser light either improves the information content of conventional experiments or makes new types of experiments possible, which could not be performed with conventional means. Sensitivity is often the main reason for using light, but it also allows one to become more selective, e.g. by selecting signals only from small parts of the sample. Examples are given for NMR, NQR, and EPR spectra that use were taken with the help of coherent optical radiation.

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Excitation of coherent Raman beats in rare earth solids with a bichromatic laser field

Cited by 10 publications

References 24 publications

Optical excitation of nuclear spin coherence in aTm3+:YAGcrystal

Optical excitation of nuclear spin coherence in aTm3+:YAGcrystal

Characterization ofYb3+171:YVO4for photonic quantum technologies

Laser‐Assisted Magnetic Resonance: Principles and Applications

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