异质光学检测自旋-声学共振在固态分子薄膜中
Heterogeneous Optically-Detected Spin-Acoustic Resonance in Solid-State Molecular Thin-film
AI总结：
本研究在固态分子薄膜中实现了异质光学检测自旋-声学共振，通过声学驱动实现无磁场下的相干自旋操控，为室温机械可寻址自旋控制提供了新方法。
摘要：
我们报道了在锂铌酸盐基底上集成高Q因子（高Q）表面声波（SAW）谐振器的五联苯薄膜中实现自旋-声学共振的实现。异质光学检测自旋-声学共振（HODSAR）是一种光学检测自旋共振测量，其中共振驱动通过机械方式由表面声波（SAW）提供。通过利用室温下五联苯的光激发三重态，我们展示了在无外部施加磁场的情况下，通过声学驱动实现相干自旋操控。该异质集成器件，称为HODSAR，利用自旋-声子耦合来实现机械驱动的无场自旋共振，为室温机械可寻址自旋控制和器件集成开辟了新途径。我们显示，SAW谐振器的高Q多模响应能够实现对接近105 MHz三重态的光谱选择性声学寻址。相干控制通过Rabi振荡得到证明，Rabi频率随着所施加的射频输入功率的平方根成正比增加，在测量的驱动范围内，这与在声学激发下的驱动两能级动力学一致。这些结果在异质集成分子薄膜平台上建立了自旋-声学共振，并提供了定量基准以评估机械介导的自旋控制。
英文摘要：
We report an implementation of spin-acoustic resonance in pentacene thin films integrated on a high-quality-factor (high-Q) surface acoustic wave (SAW) resonator on a lithium niobate substrate. Heterogeneous optically detected spin-acoustic resonance (HODSAR) is an optically detected spin-resonance measurement in which the resonant drive is delivered mechanically by a surface acoustic wave (SAW). By leveraging the photo-excited triplet state of pentacene at room temperature, we demonstrate coherent spin manipulation via acoustic driving under zero externally applied magnetic field. The heterogeneously integrated device, referred to as HODSAR, utilizes spin-phonon coupling to achieve mechanically driven, zero-field spin resonance, opening avenues for room-temperature mechanically addressable spin control and device integration. We show that the high-Q multimode response of the SAW resonator enables spectrally selective acoustic addressing of triplet transitions near 105 MHz. Coherent control is evidenced by Rabi oscillations, with a Rabi frequency that increases linearly with the square root of the applied RF input power over the measured drive range, consistent with driven two-level dynamics under acoustic excitation. These results establish spin-acoustic resonance in a heterogeneously integrated molecular thin-film platform and provide a quantitative basis for benchmarking mechanically mediated spin control.
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