We report the multi-Fano interference obtained through simultaneous acquisition of bright and dark states in different phase transitions Eu3+: BiPO4 (7:1, 6:1, 1:1, 0.5:1) NaYF4 (1:1/4) crystals. employ multi-dressed spontaneous four-wave mixing fluorescence (multi-order) to optimize strong photon-phonon nested dressing effect resulting more obvious interference. Firstly, is produced continuous multi-bound states. Secondly, five dips originate from dressings (one photon four phonons) under...

We compare the atomic coherence time of doped ion crystals, i.e., BiPO4: Eu3+, YPO4: Pr3+, and Y2SiO5: Pr3 + crystals. Such is controlled by crystal field splitting (CF-splitting) optical (photon phonon) dressing. Compared with other Eu3+ exhibits longest time. By controlling thermal phonon, phase-transition broadband or narrowband excitation, fluorescence (FL) spontaneous four-wave-mixing ratio (S-FWM), a superior up to 10 ± 0.6 ms achieved in pure hexagonal (0.5:1) phase Eu3+. Furthermore,...

We report atomic-like Autler–Townes splitting controlled by destructive and constructive natural non-Hermitian quantization in Eu3+: BiPO4. For the first time, we explored AT different regions. Fluorescence (FL), spontaneous four-wave mixing (SFWM), shot noise signals exhibit kinds of splitting. FL signal exhibits three level dip through quantization, SFWM peak multi-dip a two-level These originate single photon dressing double photon–phonon dressing, which can be adjusting experimental...

Abstract We study the Fano interference from different phase transitions of Eu 3+ :YPO 4 and Pr crystals through simultaneous detection bright dark states. For this study, we employed tetragonal (T), hexahedral (H), (H + T)-phases YPO crystals. The interfering states are classified based on dressed spontaneous parametric four-wave mixing, multi-order fluorescence, hybrid signal regimes. Further, between conti-nuous discrete can be controlled partly-(constructive–destructive)-interference a...

We report photon-phonon atomic coherence (cascade- and nested-dressing) interaction from the various phase transitions of Eu3+: BiPO4 crystal. Such spectral evolves out-of-phase fluorescence to in-phase spontaneous four-wave mixing (SFWM) by changing time gate. The dressing dip switch three dips SFWM result strong destructive cross- self-interaction for hexagonal phase, respectively. More phonon results in interaction, while less constructive coherences. experimental measurements agree with...

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Abstract For the first time, Autler Townes‐splitting dependency on parity‐time symmetry breaking is investigated. The first‐, second‐, and third‐order splitting in spectral domain outputs obtained through different phase transitions of Eu 3+ : BiPO 4 are explored. First‐order corresponds to pure crystal field attributed shifting energy levels inherent effect field. Second/third‐order results from coexistence non‐Hermitian Townes (SAT)‐splitting caused by single‐photon dressing coupled with...

In this paper, we explore the asymmetry observed between effects of photon–phonon coupling (nested-dressing) and a crystal field (CF) on fine structure fluorescence (FL) spontaneous four-wave mixing (SFWM) in Eu3+: BiPO4 NaYF4. The competition CF strong dressing leads to dynamic splitting two directions. static one direction under weak phonon dressing. evolution from results spectral asymmetry. This includes out-of-phase FL in-phase SFWM. Further, large ratio Rabi frequency de-phase rate...

We propose a multi-channel optical hybrid filter which can regulate into single-channel narrowband (SCNBF), band (HBF), and the dual-channel narrow (DCNBF) when input is broad signal. The results from multiple evolutions of spectral linewidth fluorescence (FL) signal Stokes generated by spontaneous four-wave mixing. These be controlled changing extrinsic parameters (i.e., gate position, width, laser power, detuning) in various phases europium-doped BPO (Eu3+:BiPO4) as manipulate ratio FL...

In this paper, we study double cascade dressed optical metal oxide semiconductor field-effect transistor (MOSFET) by exploiting enhancement and suppression for mixed-phase (hexagonal + tetragonal) of Eu3+:YPO4 different phases tetragonal pure Pr3+:YPO4 crystals. We report variation fine structure energy levels in doped ions (Eu3+ Pr3+) the host YPO crystal. compared multi-level transition from a single dressing laser with level lasers. Gate delay facilitates multi-energy is modeled through...

Abstract We investigate the parametrically amplified four-wave mixing, spontaneous parametric four-wave-mixing, second- and fourth-order fluorescence signals coming from four-level double-Λ electromagnetically induced transparency system of a hot 85 Rb atomic vapor. The biphoton temporal correlation is obtained four-wave-mixing processes. Meanwhile, we first observed Rabi oscillation with background linear Rayleigh scattering uncorrelated second-order fluorescence. outcomes investigation may...

We study the hybrid bound states in continuum (BIC) time and spectral domain obtained from Eu3+/Pr3+ doped YPO4 BiPO4 crystals. The BIC originates interference between broadband fluorescence (FL) narrowband super-florescence (SP-FWM) due to dressing effect crystal phase transition. present a relationship correlation investigate two-mode three-mode noise correlation/squeezing when wavelength of applied field is fixed at bright state dark state. In contrast peak, we observe switch...

We report photon–phonon dressing quantization dependency on polarization. Destructive polarization is exhibited in fluorescence (FL) for narrowband signals, while constructive dominant broadband signals due to phase perturbation. Furthermore, results coexistence of generation and effects strong competitive Rabi frequency. Low power also contributes more quantization, the same as FL region (large de-phase rate). linear circular with shows inverse direct relationships spontaneous...

We report super broad non-Hermitian line shape from out-of-phase and in-phase photon-phonon dressing (quantization) in Eu3+: NaYF4 BiPO4 nanocrystals. The is controlled by changing time gate position, width, power, temperature, sample, photomultiplier tubes, laser. observed that the fluorescence (FL) line-shape contrasts are 69.23% for 43.75% NaYF4, owing to stronger (destructive quantization). Moreover, we spontaneous four-wave mixing (SFWM) was approximately three times wider at 300 K than...

We investigate the coexisting of two-mode and three-mode bunching in intensity noise correlation by generating multi-order fluorescence from pseudo-thermal light source at low temperature using Nitrogen-vacancy center diamond. The mechanism suggests that is overlapped with via path indistinguishability, which can be further decomposed into multiple lower order through distinguishable offset. Moreover, contribution third function twice respect to bunching. demonstrate interference among two-...

We report photon-phonon atomic coherence (cascade- and nested-dressing) interaction from various phase transitions of Eu3+: BiPO4 crystal. Such spectral evolves out fluorescence to in-phase spontaneous four-wave mixing (SFWM) by changing the time gate. The dressing dip switch three dips SFWM result strong destructive cross- self-interaction for hexagonal phase, respectively. more phonon in interaction, while less constructive coherences. experimental measurements agree with theoretical...