Multi-channel router and logic NAND gate from multiple Autler-Townes splitting controlled by phase transition.

Faizan Raza,Yanpeng Zhang,Hammad-ul Wahab,Habib Ullah,Irfan Ahmed,Ubaid Khan

doi:10.1039/d0ra01379j

Abstract

For the first time, we investigated the electric-dipole transition dependent primary and secondary temporal Autler–Townes (TAT)-splitting of a hybrid signal (fluorescence and Stokes) in Pr3+:YPO4. We compared the TAT-splitting in different phases (pure tetragonal (T), pure hexahedral (H), (T + H)-phase, and (H + T)-phase) of the Pr3+:YPO4 crystal. The TAT-splitting in the (H + T)-phase was observed to be stronger than that in other phases, while the Pr3+ ion had stronger dressing than the Eu3+ 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.

Highlights

Physicists have achieved incredible progress in understanding and controlling the quantum coherence excitation and coherence transfer in atomic gases
We have demonstrated the primary and secondary temporal Autler–Townes (TAT)-splitting from different phases of the Pr3+:YPO4 crystal
Paper observed that the site symmetry-dependent TAT-splitting from mixed phases (H + T) had a strong dressing effect than that from the pure T-phase or H-phase

Summary

Introduction

Physicists have achieved incredible progress in understanding and controlling the quantum coherence excitation and coherence transfer in atomic gases. We observed that the secondary TAT-splitting is very sensitive to the electric dipole transitions, which can be controlled through the wavelength and power of laser beams.

Results

Conclusion