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Title: High sensitivity pump–probe measurements of magnetic, thermal, and acoustic phenomena with a spectrally tunable oscillator

Abstract

We describe an optical pump/probe system for sensitive measurements of time-resolved optical measurements of material dynamics. The instrument design is optimized for time-resolved magneto-optic Kerr effect (TR-MOKE) measurements of dynamics in magnetic materials. The system also allows for time-domain thermoreflectance (TDTR) measurements of thermal transport properties and picosecond acoustic measurements of film thickness and/or elastic constants. The system has several advantages over the conventional designs for TR-MOKE and/or TDTR systems. Measurements of pump-induced changes to the probe beam intensity are shot-noise limited. The system’s design allows for MOKE and/or thermoreflectance measurements of both sides of a sample. Pumping and probing the sample on opposite sides allows nanoscale flash diffusivity measurements of transport properties. The wavelengths of the pump and probe beams are straightforward to tune between 350–525 nm and 690–1050 nm. A tunable wavelength allows for optical resonances in a wide array of materials to be excited and/or probed. Finally, the setup is calibrated to allow for the real and imaginary components of Kerr signals to be separately quantified.

Authors:
 [1]; ORCiD logo [1];  [1]; ORCiD logo [1]
  1. Univ. of California, Riverside, CA (United States)
Publication Date:
Research Org.:
Univ. of California, Riverside, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES); US Army Research Office (ARO)
OSTI Identifier:
1802450
Alternate Identifier(s):
OSTI ID: 1598915
Grant/Contract Number:  
SC0012670; W911NF-18-1-0364
Resource Type:
Accepted Manuscript
Journal Name:
Review of Scientific Instruments
Additional Journal Information:
Journal Volume: 91; Journal Issue: 2; Journal ID: ISSN 0034-6748
Publisher:
American Institute of Physics (AIP)
Country of Publication:
United States
Language:
English
Subject:
47 OTHER INSTRUMENTATION; Instruments & Instrumentation; Physics

Citation Formats

Gomez, Michael J., Liu, Kexin, Lee, Jonathan G., and Wilson, Richard B. High sensitivity pump–probe measurements of magnetic, thermal, and acoustic phenomena with a spectrally tunable oscillator. United States: N. p., 2020. Web. doi:10.1063/1.5126121.
Gomez, Michael J., Liu, Kexin, Lee, Jonathan G., & Wilson, Richard B. High sensitivity pump–probe measurements of magnetic, thermal, and acoustic phenomena with a spectrally tunable oscillator. United States. https://doi.org/10.1063/1.5126121
Gomez, Michael J., Liu, Kexin, Lee, Jonathan G., and Wilson, Richard B. Tue . "High sensitivity pump–probe measurements of magnetic, thermal, and acoustic phenomena with a spectrally tunable oscillator". United States. https://doi.org/10.1063/1.5126121. https://www.osti.gov/servlets/purl/1802450.
@article{osti_1802450,
title = {High sensitivity pump–probe measurements of magnetic, thermal, and acoustic phenomena with a spectrally tunable oscillator},
author = {Gomez, Michael J. and Liu, Kexin and Lee, Jonathan G. and Wilson, Richard B.},
abstractNote = {We describe an optical pump/probe system for sensitive measurements of time-resolved optical measurements of material dynamics. The instrument design is optimized for time-resolved magneto-optic Kerr effect (TR-MOKE) measurements of dynamics in magnetic materials. The system also allows for time-domain thermoreflectance (TDTR) measurements of thermal transport properties and picosecond acoustic measurements of film thickness and/or elastic constants. The system has several advantages over the conventional designs for TR-MOKE and/or TDTR systems. Measurements of pump-induced changes to the probe beam intensity are shot-noise limited. The system’s design allows for MOKE and/or thermoreflectance measurements of both sides of a sample. Pumping and probing the sample on opposite sides allows nanoscale flash diffusivity measurements of transport properties. The wavelengths of the pump and probe beams are straightforward to tune between 350–525 nm and 690–1050 nm. A tunable wavelength allows for optical resonances in a wide array of materials to be excited and/or probed. Finally, the setup is calibrated to allow for the real and imaginary components of Kerr signals to be separately quantified.},
doi = {10.1063/1.5126121},
journal = {Review of Scientific Instruments},
number = 2,
volume = 91,
place = {United States},
year = {Tue Feb 11 00:00:00 EST 2020},
month = {Tue Feb 11 00:00:00 EST 2020}
}

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