Electromagnetically induced transparency and retrieval of light pulses in a Λ-type and a V-type level scheme in Pr³⁺:Y₂SiO₅

Abstract

We examine electromagnetically induced transparency (EIT), the optical preparation of persistent nuclear spin coherences and the retrieval of light pulses both in a Λ-type and a V-type coupling scheme in a Pr3+:Y2SiO5 crystal, cooled to cryogenic temperatures. The medium is prepared by optical pumping and spectral hole burning, creating a spectrally isolated Λ-type and a V-type system within the inhomogeneous bandwidth of the 3H4 ↔ 1D2 transition of the Pr3+ ions. By EIT, in the Λ-type scheme we drive a nuclear spin coherence between the ground-state hyperfine levels, while in the V-type scheme we drive a coherence between the excited-state hyperfine levels. We observe the cancellation of absorption due to EIT and the retrieval of light pulses in both level schemes. This also permits the determination of dephasing times of the nuclear spin coherence, either in the ground state or the optically excited state.

Lifetime Autler-Townes Splitting of Dressed Multi-Order Fluorescence in Pr3+:YSO

“…We can see that by changing detuning from −200 GHz to resonant point (0 GHz) of E b , we can see that the right peak shifts toward right from bottom to top (shown by dashed line in Figure 3B). Here, level |1 is already split into |G a± by E a and when E b detuning approaches to resonant point then |G a− will further split into |G b−± with dressing effect of (|G b | 2 /Ŵ bb refer to (1). Figure 3C shows theoretical predications of time domain FL signals corresponding to Figure 3B.…”

“…Where ρ aa is probability of diagonal density matrix element at |0>. When E a and E b are open simultaneously, E b excitation from |0> to |2> in ket site, represented by off-diagonal density matrix (ρ (1) ca ) in perturbation chain, is also called coherence. In perturbation chain (E a ) * and (E b ) * are complex conjugate of E a and E b , respectively.…”

“…The recent research progresses related to atomic coherence in solid-state materials include electromagnetically induced transparency in solid materials [1], optical velocity reduction [2], all-optical routing based on optical storage [3], coherent storage of light pulses [4], and controllable erasing of optically stored information [5]. The EIT processes can be controlled by selecting different transitions among Zeeman sublevels via the polarization states of the laser beams [6].…”

Light storage in a doped solid enhanced by feedback-controlled pulse shaping

“…Thus, experiments on coherent interactions in a welldefined three-level scheme require optical preparation of the 053801-3 inhomogeneously broadened manifold. Preparation of the doped crystal usually relies on long pulse sequences, including pulse trains and/or combinations of frequency chirps, driving optical pumping processes [3,15,16]. Optical preparation is a major issue in all experiments, dealing with coherent interactions in doped solids.…”

“…In particular, the ideas of electromagnetically induced transparency (EIT) and light storage [1][2][3] are prominent examples for such versatile coherent interactions. In light storage, a three-level quantum system interacts with two radiation pulses (the coupling and the probe pulse).…”