Decay-Associated Fourier Spectroscopy: Visible to Shortwave Infrared Time-Resolved Photoluminescence Spectra
Decay-Associated Fourier Spectroscopy: Visible to Shortwave Infrared Time-Resolved Photoluminescence Spectra
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DOI：
10.1021/acs.jpca.9b04924
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发表时间：
2019-08-08
影响因子：
2.9
通讯作者：
Caram, Justin R.
中科院分区：
文献类型：
--
作者：
Atallah, Timothy L.;Sica, Anthony, V;Caram, Justin R.
我们描述并实现了衰变相关光致发光光谱的干涉测量方法，我们将其称为衰变相关傅立叶光谱（DAFS）。在 DAFS 中，从基底发射的光子流在检测和计时之前先通过可变路径长度的马赫-曾德尔干涉仪。干涉仪将每个探测器测量的强度中的光谱信息编码，从而实现同步光谱和时间分辨率。我们详细介绍了 DAFS 的几个优点，包括波长范围不敏感性、漂移噪声消除和光学模式保持。 DAFS 允许我们将光子流引导到光纤中，从而实现超导纳米线单光子探测器，用于短波红外光谱窗口（λ = 1-2 μm）中的能量分辨光谱。我们使用两个福斯特共振能量转移对展示了 DAFS 在可见光和短波红外领域的广泛适用性：一对在传统可见波长下工作，一对在可见光和短波红外区域同时采集。
We describe and implement an interferometric approach to decay-associated photoluminescence spectroscopy, which we term decay-associated Fourier spectroscopy (DAFS). In DAFS, the emitted photon stream from a substrate passes through a variable path length Mach-Zehnder interferometer prior to detection and timing. The interferometer encodes spectral information in the intensity measured at each detector enabling simultaneous spectral and temporal resolution. We detail several advantages of DAFS, including wavelength-range insensitivity, drift-noise cancellation, and optical mode retention. DAFS allows us to direct the photon stream into an optical fiber, enabling the implementation of superconducting nanowire single photon detectors for energy-resolved spectroscopy in the shortwave infrared spectral window (lambda = 1-2 mu m). We demonstrate the broad applicability of DAFS, in both the visible and shortwave infrared, using two Forster resonance energy transfer pairs: a pair operating with conventional visible wavelengths and a pair showing concurrent acquisition in the visible and the shortwave infrared regime.