Heterodyne-detected and ultrafast time-resolved second-harmonic generation for sensitive measurements of charge transfer

Wilcox, Daniel E.; Sykes, Matthew E.; Niedringhaus, Andrew; Shtein, Max; Ogilvie, Jennifer P.

doi:10.1364/ol.39.004274

Cited by 11 publications

(18 citation statements)

References 19 publications

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“…To probe only the water/air interface, we employ phase-sensitive SHG. Phase-sensitive SHG has been used both nonspectroscopically − and spectroscopically, , and recently, a number of groups have combined this into time-resolved and phase-sensitive SHG, − primarily for use at semiconductor interfaces. We have developed a variant of these techniques that is not spectroscopic but benefits from a lock-in measurement and excellent phase stability, which is crucial to the current measurements .…”

mentioning

confidence: 99%

Charge Transfer to Solvent Dynamics at the Ambient Water/Air Interface

Nowakowski

Woods

Verlet

2016

J. Phys. Chem. Lett.

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confidence: 99%

Charge Transfer to Solvent Dynamics at the Ambient Water/Air Interface

Nowakowski

Woods

Verlet

2016

J. Phys. Chem. Lett.

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“…Simple experimental corrections, such as using larger spot sizes or shorter pulse durations, can be used to preserve the same sample fluence (and avoid sample damage) while yielding more SHG photons per laser shot. For small samples and systems employing high numerical aperture objective optics, this solution may not be practical, meaning schemes employing heterodyne detection 21,22 or stimulated SHG 23 should be investigated. Such optical signal amplification techniques will allow for measurement of additional signal components that are buried in the noise and difficult to resolve, with the primary limitations being the number of demodulators that simultaneously analyze the signal.…”

Section: Discussionmentioning

confidence: 99%

Fourier domain rotational anisotropy-second harmonic generation

Lu¹,

Torchinsky²

2018

Opt. Express

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We describe a novel scheme of detecting rotational anisotropy second harmonic generation (RA-SHG) signals using a lock-in amplifier referenced to a fast scanning RA-SHG apparatus. The method directly measures the n th harmonics of the scanning frequency corresponding to SHG signal components of C n symmetry that appear in a Fourier series expansion of a general RA-SHG signal. GaAs was used as a test sample allowing comparison of point-bypoint averaging with the lock-in based method. When divided by the C ∞ signal component, the lock-in detected data allowed for both self-referenced determination of ratios of C n components of up to 1 part in 10 4 and significantly more sensitive measurement of the relative amount of different C n components when compared with conventional methods.

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“…The pump and probe pulse durations estimated from the SPEAR [113] and MIIPS [114] pulse compression algorithms were 12.8fs and 10.0fs, respectively.…”

Section: Brc 2des Experimentsmentioning

confidence: 99%

Probing Ultrafast Dynamics of Bacterial Reaction Centers Using Two-Dimensional Electronic Spectroscopy

Niedringhaus

Policht

Ogilvie

2016

International Conference on Ultrafast Phenomena

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out my time here at U of M. She has provided interesting, challenging, and important research problems which have pushed me to grow as a scientist. Whenever I felt stuck on a problem, her insight and optimism would always put things in perspective. Thank you to the past group members-Frank, Daniel, Seckin, Jeff, Kristin-for doing most of the legwork in developing the versatile 2D setup I inherited. I would like to thank Veronica for her hard work doing all the sample preps for the experiments presented here, and for all the late nights and early mornings she spent running experiments. To the 2015 TRVS group-Anton, Veronica, Seckin, Libby, Yassel-thank you for going along with my ill-conceived plan to traverse 20 miles through the Porcupine Mountains in one day. It didn't look that far on the map. Thank you to Professors Christine Kirmaier and Dewey Holten at Washington University for providing the BRC samples, and for patiently answering our many questions. Finally, I want to thank my wife Ellen for her love, support, and encouragement, and for her patience and understanding through the many late nights and weekends I have spent working on this project. ii

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Heterodyne-detected and ultrafast time-resolved second-harmonic generation for sensitive measurements of charge transfer

Cited by 11 publications

References 19 publications

Charge Transfer to Solvent Dynamics at the Ambient Water/Air Interface

Charge Transfer to Solvent Dynamics at the Ambient Water/Air Interface

Fourier domain rotational anisotropy-second harmonic generation

Probing Ultrafast Dynamics of Bacterial Reaction Centers Using Two-Dimensional Electronic Spectroscopy

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