论文标题
随机颞激光斑点，用于稳健测量亚微秒光致发光衰变
Random temporal laser speckles for robust measurement of sub-microsecond photoluminescence decay
论文作者
论文摘要
时间分辨的光致发光（PL）通常用于跟踪各种材料中的动力学。因此，寻求简化PL动力学的获取会引起不断的关注。本文为PL衰减的测量提供了一种新的强大而直接的方法，该方法基于随机波动的激发强度。通过使用在旋转扩散器上产生的激光斑点来实现随机激发波形。因此，提出的技术能够利用任何一致的激发源，而无需生成短脉冲或可控制的光。可以从PL痕迹的傅立叶图像中重建PL衰减。该论文证明了该方法的性能，随着脉冲响应函数达到300 ns，该方法能够获取子微秒动力学。将重建的PL衰变与条纹摄像头测量进行比较，以验证该方法。最后，讨论了该技术的潜在局限性和应用。
Time-resolved photoluminescence (PL) is commonly used to track dynamics in a broad range of materials. Thus, the search for simplification of the acquisition of PL kinetics attracts continuous attention. This paper presents a new robust and straightforward approach to the measurement of PL decay, which is based on randomly fluctuating excitation intensity. The random excitation waveform is attained by using laser speckles generated on a rotating diffuser. Owing to this, the presented technique is able to utilize any coherent excitation source without the necessity to generate short pulses or to controllably modulate the light. PL decay can be computationally reconstructed from the Fourier image of the PL trace. The paper demonstrates the performance of the method, which is able to acquire sub-microsecond dynamics as the impulse response function reaches 300 ns. The reconstructed PL decays were compared to streak camera measurements to verify the method. Finally, potential limitations and applications of the technique are discussed.
