Temporal interaction of hybrid signals in various phases of Eu³⁺: BiPO₄ through photon–phonon dressing

Abstract

Laser interaction with doped crystals exhibiting photon-photon and photon-phonon coupling has been focused on recently. In pretext, here we report the spectral and temporal profile interaction of two lasers excitation through various phases of Eu3+: BiPO4 crystals. We reveal that spectral-temporal profile interaction of hybrid signals (coexisting fluorescence and spontaneous four-wave mixing) are dressed by nested and cascade processes of two-photons (two-phonon). Such interaction comes from thermal phonon constructive and phase transition phonon destructive dressing. The spectral and temporal (profile) interactions are interrelated and reduced by about 2-times due to two-photon nested dressing in contrast to the interaction through the sum of each laser excitation. In contrast to a single laser, spectral (Fano)-dip interaction reduces by 2-times due to two-photon destructive dressing coupling. Moreover, thermal phonon dressing at 300K exhibits 3-times more extensive temporal interaction than that at 77K. The phase transition phonon dressing for a half hexagonal and half low-temperature monoclinic phase is about 1.5-times longer than that of the pure hexagonal phase of Eu3+: BiPO4. These results may help to understand the spectral-temporal relationship in the fields of nonlinear and quantum optics.

Spectral non-hermitian quantization line shape controlled by phonon dressing in various phases of Eu3+:BiPO4

“…4(a and b), which was attributed to the strongest phonon dressing in the (0.5 : 1) sample (pure-H phase) in contrast with the other two samples (mixed phases). 23 The SFWM profile quantization (half EP control) ratio L SF was about 23.2, as obtained from Fig. 4(c1) to (c5).…”

“…It is worth mentioning that the number of phonons in each sample was different, depending on each phase's concentration. Pure HP had more phonons and pure LTMP had less phonon, 23 hence by using various combinations and concentrations of HP and LTMP, we could control the sample phonon dressing. Two dye lasers (narrow scan with a 0.04 cm −1 line shape) pumped by an injection-locked single-mode Nd:YAG laser (Continuum Powerlite DLS 9010, 10 Hz repetition rate, 5ns pulse width) were used to generate the two pumping fields E 1 ( ω 1 , Δ 1 ) and E 2 ( ω 2 , Δ 2 ) with the frequency detuning Δ i = Ω mn − ω i .…”

“…22 Later research on crystals in powder form grown through hydrothermal methods, such as Eu 3+ /Pr 3+ :YPO 4 and Eu 3+ :BiPO 4 , revealed strong photon–photon dressing coupling in atomic-like media. 23 Recently, a narrow band and hybrid filter using different line-shape evolution by changing the time gate in different atomic media was proposed. 24 However, in this work, we propose a spectral notch filter, which can be controlled by temperature-dependent phonon dressing.…”

Photon–Phonon Atomic Coherence Interaction of Nonlinear Signals in Various Phase Transitions Eu3+: BiPO4

“…Recently, the photon–phonon dressing coupling in Eu 3+ ions doped BiPO 4 has been studied [ 8 , 9 ], as Eu 3+ /Pr 3+ ions are very sensitive to the site symmetry and its surrounding crystal field of the host material compared to other crystal ions [ 10 , 11 , 12 ]. Therefore, it can be achievable to obtain such a potential application in BiPO 4 crystal.…”

Photon-phonon Atomic Coherence Interaction of Non-linear Signals in Various Phase Transitions Eu3+: BiPO4

“…Recently, the photon-phonon dressing coupling in Eu 3+ ions doped BiPO4 has been studied [8][9], as Eu 3+ / Pr 3+ ions are very sensitive to the site symmetry and its surrounding crystal field of the host material than other crystal ions [10][11][12]. Therefore, it can be achievable to get such kind of potential application in BiPO4 crystal.…”