Sub-10 fs Time-Resolved Vibronic Optical Microscopy

Christoph Schnedermann; Jong Min Lim; Torsten Wende; Alex S. Duarte; Limeng Ni; Qifei Gu; Aditya Sadhanala; Akshay Rao; Philipp Kukura

doi:10.1021/acs.jpclett.6b02387

Sub-10 fs Time-Resolved Vibronic Optical Microscopy

Christoph Schnedermann, Jong Min Lim, Torsten Wende, Alex S. Duarte, Limeng Ni, Qifei Gu, Aditya Sadhanala, Akshay Rao, Philipp Kukura

Research output: Contribution to journal › Article › peer-review

45 Scopus citations

Abstract

We introduce femtosecond wide-field transient absorption microscopy combining sub-10 fs pump and probe pulses covering the complete visible (500-650 nm) and near-infrared (650-950 nm) spectrum with diffraction-limited optical resolution. We demonstrate the capabilities of our system by reporting the spatially- and spectrally-resolved transient electronic response of MAPbI_3-xCl_x perovskite films and reveal significant quenching of the transient bleach signal at grain boundaries. The unprecedented temporal resolution enables us to directly observe the formation of band-gap renormalization, completed in 25 fs after photoexcitation. In addition, we acquire hyperspectral Raman maps of TIPS pentacene films with sub-400 nm spatial and sub-15 cm^-1 spectral resolution covering the 100-2000 cm^-1 window. Our approach opens up the possibility of studying ultrafast dynamics on nanometer length and femtosecond time scales in a variety of two-dimensional and nanoscopic systems.

Original language	English
Pages (from-to)	4854-4859
Number of pages	6
Journal	Journal of Physical Chemistry Letters
Volume	7
Issue number	23
DOIs	https://doi.org/10.1021/acs.jpclett.6b02387
State	Published - 1 Dec 2016

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title = "Sub-10 fs Time-Resolved Vibronic Optical Microscopy",

abstract = "We introduce femtosecond wide-field transient absorption microscopy combining sub-10 fs pump and probe pulses covering the complete visible (500-650 nm) and near-infrared (650-950 nm) spectrum with diffraction-limited optical resolution. We demonstrate the capabilities of our system by reporting the spatially- and spectrally-resolved transient electronic response of MAPbI3-xClx perovskite films and reveal significant quenching of the transient bleach signal at grain boundaries. The unprecedented temporal resolution enables us to directly observe the formation of band-gap renormalization, completed in 25 fs after photoexcitation. In addition, we acquire hyperspectral Raman maps of TIPS pentacene films with sub-400 nm spatial and sub-15 cm-1 spectral resolution covering the 100-2000 cm-1 window. Our approach opens up the possibility of studying ultrafast dynamics on nanometer length and femtosecond time scales in a variety of two-dimensional and nanoscopic systems.",

author = "Christoph Schnedermann and Lim, {Jong Min} and Torsten Wende and Duarte, {Alex S.} and Limeng Ni and Qifei Gu and Aditya Sadhanala and Akshay Rao and Philipp Kukura",

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AU - Schnedermann, Christoph

AU - Lim, Jong Min

AU - Wende, Torsten

AU - Duarte, Alex S.

AU - Ni, Limeng

AU - Gu, Qifei

AU - Sadhanala, Aditya

AU - Rao, Akshay

AU - Kukura, Philipp

PY - 2016/12/1

Y1 - 2016/12/1

N2 - We introduce femtosecond wide-field transient absorption microscopy combining sub-10 fs pump and probe pulses covering the complete visible (500-650 nm) and near-infrared (650-950 nm) spectrum with diffraction-limited optical resolution. We demonstrate the capabilities of our system by reporting the spatially- and spectrally-resolved transient electronic response of MAPbI3-xClx perovskite films and reveal significant quenching of the transient bleach signal at grain boundaries. The unprecedented temporal resolution enables us to directly observe the formation of band-gap renormalization, completed in 25 fs after photoexcitation. In addition, we acquire hyperspectral Raman maps of TIPS pentacene films with sub-400 nm spatial and sub-15 cm-1 spectral resolution covering the 100-2000 cm-1 window. Our approach opens up the possibility of studying ultrafast dynamics on nanometer length and femtosecond time scales in a variety of two-dimensional and nanoscopic systems.

AB - We introduce femtosecond wide-field transient absorption microscopy combining sub-10 fs pump and probe pulses covering the complete visible (500-650 nm) and near-infrared (650-950 nm) spectrum with diffraction-limited optical resolution. We demonstrate the capabilities of our system by reporting the spatially- and spectrally-resolved transient electronic response of MAPbI3-xClx perovskite films and reveal significant quenching of the transient bleach signal at grain boundaries. The unprecedented temporal resolution enables us to directly observe the formation of band-gap renormalization, completed in 25 fs after photoexcitation. In addition, we acquire hyperspectral Raman maps of TIPS pentacene films with sub-400 nm spatial and sub-15 cm-1 spectral resolution covering the 100-2000 cm-1 window. Our approach opens up the possibility of studying ultrafast dynamics on nanometer length and femtosecond time scales in a variety of two-dimensional and nanoscopic systems.

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JO - Journal of Physical Chemistry Letters

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ER -

Sub-10 fs Time-Resolved Vibronic Optical Microscopy

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