Optogalvanic detection of velocity-selective optical pumping in an open, cascade atomic medium

Araujo, Luı́s E. E. de; Carvalho, Silvânia A.; Cruz, Luciano S.; Soares, Antonio Augusto; Mirage, A.; Pereira, D.; Cruz, Flávio C.

doi:10.1016/j.optcom.2007.10.041

Cited by 4 publications

(3 citation statements)

References 24 publications

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“…5 (right frame)]. First, for the simulation of the AFC preparation we use the density matrix equations and parameters for a Ba vapor (see transition properties in, e.g., [35]) at 800 o C (typical in hollow cathode lamps [34,36,37]) and a density of = 2.5 × 10 20 at/m 3 . The decay rates from the excited state to the ground and metastable states are γ 21 = 1.19 × 10 8 s −1 and γ 23 = 0.25 × 10 6 s −1 (the decay to state |4 is γ 24 γ 23 /100 so we can safely neglect it), respectively, while the transition frequencies are ω 32 = 2π · 200 THz and ω 12 = 2π · 540 THz, so ω 13 = 2π · 340 THz.…”

Section: Numerical Example Of a Pap-based Afc-qmmentioning

confidence: 99%

“…For this reason, to implement the QM (once the VC has been created), one could consider a single telecom photon coupling the |2 ↔ |3 transition. However, in order to circumvent the spontaneous emission from the excited state |2 , the photon will be stored in the atomic coherence between state |3 and the long-lived state |4 = 6s5d First, for the simulation of the AFC preparation we use the density matrix equations and parameters for a Ba vapor (see transition properties in, e.g., [35]) at 800 o C (typical in hollow cathode lamps [34,36,37]) and a density of = 2.5 × 10 20 at/m 3 . The decay rates from the excited state to the ground and metastable states are .…”

Section: Numerical Example Of a Pap-based Afc-qmmentioning

confidence: 99%

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Atomic-frequency-comb quantum memory via piecewise adiabatic passage

et al. 2018

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In this work, we propose a method to create an atomic frequency comb (AFC) in hot atomic vapors using the piecewise adiabatic passage (PAP) technique. Due to the Doppler effect, the trains of pulses used for PAP give rise to a velocity-dependent transfer of the atomic population from the initial state to the target one, thus forming a velocity comb whose periodicity depends not only on the repetition rate of the applied pulses but also on the specific atomic transitions considered. We highlight the advantages of using this transfer technique with respect to standard methods and discuss, in particular, its application to store a single telecom photon in an AFC quantum memory using a high density Ba atomic vapor.

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Section: Numerical Example Of a Pap-based Afc-qmmentioning

confidence: 99%

Section: Numerical Example Of a Pap-based Afc-qmmentioning

confidence: 99%

Atomic-frequency-comb quantum memory via piecewise adiabatic passage

et al. 2018

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“…Este é um dos motivos que fez com que surgissem diversos sistemas de laser nesta região do espectro, além da importância destes lasers para estudos de resfriamento e aprisionamento, assim como espectroscopia, em átomos como o de cálcio ( 40 Ca) e o de itérbio (Yb) [87]. A motivação deste trabalho foi a possibilidade de utilizar esta fonte de luz em 423 nm para aprisionar e resfriar átomos de 40 Ca, elemento este que vem sendo investigado pelo grupo nos últimos anos [105][106][107][108]. Fringe) para gerar um sinal de erro [112] e fazer a sintonia fina do laser, por meio do posicionamento preciso de um dos espelhos planos da cavidade (tweeter) sobre um PZT.…”

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Grades de difração induzidas eletromagneticamente em vapores atômicos

Carvalho¹

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Agradeço primeiramente a Deus e aos meus pais, Ivo Sabino de Carvalho e Zélia Maria Alves de Carvalho, por estarem ao meu lado a todo momento, nunca deixando que eu desanimasse.Ao meu orientador prof. Dr. Luís Eduardo Evangelista de Araujo pela paciência, pela atenção e, em especial, pela excelente orientação. Obrigada por ter me ensinado a ser paciente e persistente, nunca desanimando perante os obstáculos.À minha irmã Ivone Alves de Carvalho.Aos meus parentes e familiares que mesmo de longe sempre estiveram rezando por mim, em especial,

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Deep optical trap for cold alkaline-Earth atoms

Cruz¹,

Sereno²,

Cruz³

2008

Opt. Express

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We describe a setup for a deep optical dipole trap or lattice designed for holding atoms at temperatures of a few mK, such as alkaline-Earth atoms which have undergone only regular Doppler cooling. We use an external optical cavity to amplify 3.2 W from a commercial single-frequency laser at 532 nm to 523 W. Powers of a few kW, attainable with low-loss optics or higher input powers, allow larger trap volumes for improved atom transfer from magneto-optical traps. We analyze possibilities for cooling inside the deep trap, the induced Stark shifts for calcium, and a cancellation scheme for the intercombination clock transition using an auxiliary laser.

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Optogalvanic detection of velocity-selective optical pumping in an open, cascade atomic medium

Cited by 4 publications

References 24 publications

Atomic-frequency-comb quantum memory via piecewise adiabatic passage

Atomic-frequency-comb quantum memory via piecewise adiabatic passage

Grades de difração induzidas eletromagneticamente em vapores atômicos

Deep optical trap for cold alkaline-Earth atoms

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