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RSC Advances

Double cascade dressed MOSFET from doped Eu 3+ and Pr 3+ in a host YPO 4

Huanrong Fan, Al Imran, Faizan Raza, Irfan Ahmed, Kamran Amjad, Peng Li, Yanpeng Zhang

Published Jan 1, 2019• 8 citations
Publisher

Abstract

By changing different parameters of single and double lasers, we observed the dressed energy level transition from single to multi-level with a single laser. Each sample responded based on their ions' structure and phase symmetry in the host YPO crystal.
DOI
10.1039/c9ra08550e

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ion in the host material of YPO. Furthermore, we observed that the ratio of primary and secondary TAT-splitting can be controlled by the single and double dressing effect using the power and detuning of employed laser fields. In our experiment, we observed that secondary splitting from secondary dressed levels can only be observed at the resonance wavelength in the three-level system. Based on the results, we proposed a model for a multi-channel optical router and logic NAND gate. The routing action results from primary and secondary TAT-splitting, while the NAND gate was realized by the primary dressed states.

RSC Advances•Jan 1, 2020•2 citations
We report the spectral and temporal nature of different phases of europium-doped YPO (Eu 3+ : YPO 4 ) and praseodymium-doped YPO (Pr 3+ : YPO 4 ) crystals. We investigate the change in the dressing effect by shifting the energy levels causing change in line-shape and resolution of the output spectral signal when we employ the hexagonal (H), tetragonal (T), and mixed phase of H and T with different proportions. Further, we propose a tunable spectral filter (narrow bandpass notch filter and bandstop filter) by controlling the dressed phases of Eu 3+ : YPO 4 . The high-resolution dressing peak suggests the realization of the tunable spectral filter with bandwidth contrast of about 93%.
Abstract We investigated the evolution of spectral intensity of the composite signal (Stokes ( E S ) + fluorescence (FL)) by varying time delay in different phases (tetragonal (T), hexagonal (H), (T + H) and (H + T)) of Eu 3+ :YPO 4 and Pr 3+ :YPO 4 . In a composite signal, there exists a competition between FL and E S that can be modulated through dressing effect. We observed that dressing effect has strong dependence on dipole moment, transition probability and phase symmetry of atomic like media. The dressing suppression dip in H- and T-phase YPO 4 is relatively weaker than mixed (H + T)-phase YPO, while the dressing effect is weaker in Eu 3+ :YPO 4 as compared to Pr 3+ :YPO 4 . By adjusting the time delay, FL signal can be switched from suppression dip to enhancement peak and vice versa. Further, we explored intensity-difference squeezing and intensity-noise correlation between composite signal (FL + E S ) and anti-Stokes under nonlinear phase modulated by time delay. Based on our spectral intensity results, we realized the model of dressing based switch.
ion in the host material of YPO. Furthermore, we observed that the ratio of primary and secondary TAT-splitting can be controlled by the single and double dressing effect using the power and detuning of employed laser fields. In our experiment, we observed that secondary splitting from secondary dressed levels can only be observed at the resonance wavelength in the three-level system. Based on the results, we proposed a model for a multi-channel optical router and logic NAND gate. The routing action results from primary and secondary TAT-splitting, while the NAND gate was realized by the primary dressed states.