2024/12/05 by Jiun‐Shiuan Shiu, Shiu, Jiun-Shiuan, Changwei Lin +12 · 2 citations
Physics and Astronomy · Computer Science · #Laser-Matter Interactions and Applications #Quantum optics and atomic interactions #Quantum Information and Cryptography
paper · pdf · doi:10.48550/arxiv.2412.04127
We present experimental results on tuning biphoton frequency by introducing a detuned coupling field in spontaneous four-wave mixing (SFWM), and examine its impact on the pairing ratio. This tunability is achieved by manipulating the inherent electromagnetically induced transparency (EIT) effect in the double-Λ scheme. Introducing a detuned coupling field degrades the efficiency of EIT-based stimulated four-wave mixing, which in turn reduces the biphoton pairing ratio. However, this reduction can be mitigated by increasing the optical power of the coupling field. Additionally, we observe that blue- and red-detuning the biphoton frequency results in distinct temporal profiles of biphoton wavepackets due to phase mismatch. These findings provide insights into the mechanisms of frequency-tunable biphoton generation via SFWM, and suggest potential optimizations for applications in quantum communication and information processing.