Determination and correction of spectral phase from principal component analysis of coherent phonons

Allan S. Johnson; Emmanuel B. Amuah; Khalid M. Siddiqui; Maurizio Monti; Simon E. Wall

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Determination and correction of spectral phase from principal component analysis of coherent phonons

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arxiv 2311.14853 v1 pith:CISL7ZHE submitted 2023-11-24 physics.optics

Emmanuel B. Amuah , Khalid M. Siddiqui , Maurizio Monti , Allan S. Johnson , Simon E. Wall This is my paper · ORCID

classification physics.optics

keywords phasespectralcoherentmeasurementsphononspulseaccuracyaccurate

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Measuring the spectral phase of a pulse is key for performing wavelength resolved ultrafast measurements in the few femtosecond regime. However, accurate measurements in real experimental conditions can be challenging. We show that the reflectivity change induced by coherent phonons in a quantum material can be used to infer the spectral phase of an optical probe pulse with few-femtosecond accuracy.

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