scholarly journals Transient absorption spectroscopy on spiropyran monolayers using nanosecond pump–probe Brewster angle reflectometry

2013 ◽  
Vol 12 (5) ◽  
pp. 848 ◽  
Author(s):  
Bernhard Siebenhofer ◽  
Sergey Gorelik ◽  
Martin J. Lear ◽  
Hong Yan Song ◽  
Christoph Nowak ◽  
...  
Keyword(s):  
Absorption Spectroscopy ◽  
Transient Absorption ◽  
Brewster Angle ◽  
Transient Absorption Spectroscopy ◽  
Pump Probe

scholarly journals All-XUV Pump-Probe Transient Absorption Spectroscopy of the Structural Molecular Dynamics of Di-iodomethane

2021 ◽  
Vol 11 (3) ◽  
Author(s):  
Marc Rebholz ◽  
Thomas Ding ◽  
Victor Despré ◽  
Lennart Aufleger ◽  
Maximilian Hartmann ◽  
...  
Keyword(s):  
Molecular Dynamics ◽  
Absorption Spectroscopy ◽  
Transient Absorption ◽  
Transient Absorption Spectroscopy ◽  
Pump Probe

scholarly journals Single 3.3 fs multiple plate compression light source in ultrafast transient absorption spectroscopy

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Ronnie R. Tamming ◽  
Chao-Yang Lin ◽  
Justin M. Hodgkiss ◽  
Shang-Da Yang ◽  
Kai Chen ◽  
...  
Keyword(s):  
Spectral Density ◽  
Light Source ◽  
Absorption Spectroscopy ◽  
Transient Absorption ◽  
Transient Absorption Spectroscopy ◽  
Parametric Amplifiers ◽  
Pump Probe ◽  
Optical Parametric ◽  
Optical Parametric Amplifiers ◽  
Ultrafast Transient Absorption

AbstractUltrafast transient absorption spectroscopy is a powerful tool to reveal excited state dynamics in various materials. Conventionally, probe pulses are generated via bulk supercontinuum generation or (noncollinear) optical parametric amplifiers whilst pump pulses are generated separately using (noncollinear) optical parametric amplifiers. These systems are limited by either their spectral density, stability, spectral range, and/or temporal compressibility. Recently, a new intense broadband light source is being developed, the multi-plate compression, which promises to overcome these limitations. In this paper, we analyze the supercontinuum generated by a single Multiple Plate Compression system to set a benchmark for its use in the field of ultrafast pump-probe spectroscopy. We have compressed the supercontinuum to 3.3 fs using chirp mirrors alone, making it an excellent candidate for pump-probe experiments requiring high temporal resolution. Furthermore, the single light source can be used to generate both probe and pump pulses due to its high spectral density (>14.5 nJ/nm) between 490 and 890 nm. The intensity has an average shot-to-shot relative standard deviation of 4.6 % over 490 to 890 nm, calculated over 2,000 sequential shots. By using only 1,000 shot pairs, a $$\Delta T/T$$ Δ T / T noise level of $$2.6\times 10^{-4}$$ 2.6 × 10 - 4 RMS is achieved. Finally, as a proof of concept, the transient absorption spectrum of a methylammonium lead iodide perovskite film is taken, showing great signal to noise with only 1,000 shot pairs. These results show great potential for the employment of this technique in other spectroscopic techniques such as coherent multidimensional spectroscopy.

scholarly journals Single 3.3-fs Multiple-Plate Compression Light Source in Ultrafast Transient Absorption Spectroscopy

2021 ◽  
Author(s):  
Kai Chen ◽  
Ronnie Tamming ◽  
Justin Hodgkiss ◽  
Chih-Hsuan Lu ◽  
Shang-Da Yang ◽  
...  
Keyword(s):  
Spectral Density ◽  
Light Source ◽  
Absorption Spectroscopy ◽  
Transient Absorption ◽  
Transient Absorption Spectroscopy ◽  
Parametric Amplifiers ◽  
Pump Probe ◽  
Optical Parametric ◽  
Optical Parametric Amplifiers ◽  
Ultrafast Transient Absorption

Abstract Ultrafast transient absorption spectroscopy is a powerful tool to reveal excited state dynamics in various materials. Conventionally, probe pulses are generated via bulk supercontinuum generation or (noncollinear) optical parametric amplifiers whilst pump pulses are generated separately from (noncollinear) optical parametric amplifiers. These systems are limited by either their spectral density, stability, spectral range, and/or temporal compressibility. Recently, a new intense broadband light source is being developed, the multi plate compression, which promises to overcome these limitations. In this paper, we analyze the supercontinuum generated by a single multiple-plate compression system to set a benchmark for its use in the field of ultrafast pump-probe spectroscopy. We have compressed the supercontinuum to 3.3 fs using chirp mirrors alone, making it an excellent candidate for pump-probe experiments requiring high temporal resolution. Furthermore, the single light source can be used to generate both pump and probe pulses due to its high spectral density (>14.5 nJ/nm) between 490 and 890 nm. The intensity has an average shot-to-shot relative standard deviation of 4.6% over 490 to 890 nm, calculated over 2,000 sequential shots. By using only 1,000 shot pairs, a ΔT/T noise level of 2.6 × 10−4 RMS is achieved. Finally, as a proof of concept, the transient absorption spectrum of a methylammonium lead iodide perovskite film has been taken, showing great signal to noise with only 1,000 shot pairs. These results show great potential for the employment of this technique in other spectroscopic techniques such as coherent multidimensional spectroscopy.

Charge-Transfer Dynamics at Ag/Ni-MOF/Cu2O heterostructure in Photoelectrochemical NH3 production

2021 ◽  
Author(s):  
Ying Liu ◽  
Jianmin Lu ◽  
Qianxiao Zhang ◽  
Yajie Bai ◽  
Xuliang Pang ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Absorption Spectroscopy ◽  
Transient Absorption ◽  
Transient Absorption Spectroscopy ◽  
Yield Rate ◽  
Ultrafast Transient Absorption ◽  
Charge Transfer Dynamics ◽  
Ultrafast Transient Absorption Spectroscopy

Decoration of Ag-ultrathin Ni-MOF onside Cu2O was firstly fabricated. The charge-transfer dynamics at heterostructure was in-depth revealed by ultrafast transient absorption spectroscopy. NH3 yield rate (4.63 μg h-1 cm-2) with...

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