Holographic Storage of Ultrafast Photonic Qubit in Molecules

IF 3.7 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY Advanced Photonics Research Pub Date : 2024-02-09 DOI:10.1002/adpr.202400008
Alexis Voisine, F. Billard, O. Faucher, P. Béjot, É. Hertz
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Abstract

Herein, it is demonstrated that ultrashort spatially structured beams can sculpt a sample of gas‐phase molecules like a 4D material to produce a spatial pattern of aligned molecules whose shape and temporal evolution allow to restore the spatial light information on a time‐delayed reading pulse. To do so, the spatial phase and amplitude information of ultrashort light beams are encoded into rotational coherences of molecules by exploiting the interplay between spin angular momentum and orbital angular momentum. The field‐free molecular alignment resulting from the interaction leads to an inhomogeneous spatial structuring of the sample allowing to transfer the encoded information into a time‐delayed probe beam. The demonstration is conducted in molecules. Besides applications in terms of THz bandwidth buffer memory, the strategy features interesting prospects for establishing versatile optical processing of orbital angular momentum (OAM) fields, for studying various molecular processes, or for designing new photonic devices enabling to impart superpositions of OAM modes to light beams.
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全息存储分子中的超快光子丘比特
本文证明,超短空间结构光束可以像四维材料一样雕刻气相分子样品,产生排列整齐的分子空间图案,其形状和时间演变允许在延时读取脉冲上还原空间光信息。为此,利用自旋角动量和轨道角动量之间的相互作用,将超短光束的空间相位和振幅信息编码为分子的旋转一致性。相互作用产生的无场分子排列会导致样品的非均质空间结构,从而将编码信息传输到延时探针光束中。演示在分子中进行。除了在太赫兹带宽缓冲存储器方面的应用外,该策略还具有建立轨道角动量(OAM)场的多功能光学处理、研究各种分子过程或设计新型光子设备的有趣前景,这些设备能够将 OAM 模式叠加到光束中。
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