论文标题
可见的泵 - 中红外泵 - 宽带探测：用于单发超快光谱的三脉冲设置的开发和表征50 kHz
Visible pump -- mid infrared pump -- broadband probe: development and characterization of a three-pulse setup for single-shot ultrafast spectroscopy at 50 kHz
论文作者
论文摘要
我们在这里报告了一个实验设置，以在广泛的波长和温度范围内执行三脉冲泵探针测量。 By combining two pump pulses in the visible (650-900 nm) and mid-IR (5-20 $μ$m) range, with a broadband supercontinuum white-light probe, our apparatus enables both the combined selective excitation of different material degrees of freedom and a full time-dependent reconstruction of the non-equilibrium dielectric function of the sample.我们在这里描述了光学设置，低温样本环境和能够以50 kHz的最大重复速率引用的宽带光谱的单脉冲检测的定制采集电子，从而在1 s的集成时间内达到了10 $^{ - 4} $的顺序。我们通过在单级泵，光学推动和宽带探针上报告Bi $ $ _2 $ _2 $ _2 $ sr $ _2 $ y $ y $ _ $ _ {0.08} $ ca $ _ {0.92} $ cu $ _2 $ _2 $ _ {8+δ} $ clone ph.
We report here an experimental setup to perform three-pulse pump-probe measurements over a wide wavelength and temperature range. By combining two pump pulses in the visible (650-900 nm) and mid-IR (5-20 $μ$m) range, with a broadband supercontinuum white-light probe, our apparatus enables both the combined selective excitation of different material degrees of freedom and a full time-dependent reconstruction of the non-equilibrium dielectric function of the sample. We describe here the optical setup, the cryogenic sample environment and the custom-made acquisition electronics capable of referenced single-pulse detection of broadband spectra at the maximum repetition rate of 50 kHz, achieving a sensitivity of the order of 10$^{-4}$ over an integration time of 1 s. We demonstrate the performance of the setup by reporting data on mid-IR pump, optical push and broadband probe in a single-crystal of Bi$_2$Sr$_2$Y$_{0.08}$Ca$_{0.92}$Cu$_2$O$_{8+δ}$ across the superconducting and pseudogap phases.
