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Title: Laser heating of scanning probe tips for thermal near-field spectroscopy and imaging

Abstract

Spectroscopy and microscopy of the thermal near-field yield valuable insight into the mechanisms of resonant near-field heat transfer and Casimir and Casimir-Polder forces, as well as providing nanoscale spatial resolution for infrared vibrational spectroscopy. A heated scanning probe tip brought close to a sample surface can excite and probe the thermal near-field. Typically, tip temperature control is provided by resistive heating of the tip cantilever. However, this requires specialized tips with limited temperature range and temporal response. By focusing laser radiation onto AFM cantilevers, we achieve heating up to ~1800 K, with millisecond thermal response time. We demonstrate application to thermal infrared near-field spectroscopy (TINS) by acquiring near-field spectra of the vibrational resonances of silicon carbide, hexagonal boron nitride, and polytetrafluoroethylene. In this study, we discuss the thermal response as a function of the incident excitation laser power and model the dominant cooling contributions. Our results provide a basis for laser heating as a viable approach for TINS, nanoscale thermal transport measurements, and thermal desorption nano-spectroscopy.

Authors:
 [1];  [1]
  1. Department of Physics, Department of Chemistry, and JILA, University of Colorado at Boulder, Boulder, Colorado 80309, USA
Publication Date:
Research Org.:
Univ. of Colorado, Boulder, CO (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1337588
Alternate Identifier(s):
OSTI ID: 1421261; OSTI ID: 1535293
Grant/Contract Number:  
SC0008807
Resource Type:
Published Article
Journal Name:
APL Photonics
Additional Journal Information:
Journal Name: APL Photonics Journal Volume: 2 Journal Issue: 2; Journal ID: ISSN 2378-0967
Publisher:
American Institute of Physics
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; optics; physics

Citation Formats

O’Callahan, Brian T., and Raschke, Markus B. Laser heating of scanning probe tips for thermal near-field spectroscopy and imaging. United States: N. p., 2016. Web. doi:10.1063/1.4972048.
O’Callahan, Brian T., & Raschke, Markus B. Laser heating of scanning probe tips for thermal near-field spectroscopy and imaging. United States. doi:10.1063/1.4972048.
O’Callahan, Brian T., and Raschke, Markus B. Tue . "Laser heating of scanning probe tips for thermal near-field spectroscopy and imaging". United States. doi:10.1063/1.4972048.
@article{osti_1337588,
title = {Laser heating of scanning probe tips for thermal near-field spectroscopy and imaging},
author = {O’Callahan, Brian T. and Raschke, Markus B.},
abstractNote = {Spectroscopy and microscopy of the thermal near-field yield valuable insight into the mechanisms of resonant near-field heat transfer and Casimir and Casimir-Polder forces, as well as providing nanoscale spatial resolution for infrared vibrational spectroscopy. A heated scanning probe tip brought close to a sample surface can excite and probe the thermal near-field. Typically, tip temperature control is provided by resistive heating of the tip cantilever. However, this requires specialized tips with limited temperature range and temporal response. By focusing laser radiation onto AFM cantilevers, we achieve heating up to ~1800 K, with millisecond thermal response time. We demonstrate application to thermal infrared near-field spectroscopy (TINS) by acquiring near-field spectra of the vibrational resonances of silicon carbide, hexagonal boron nitride, and polytetrafluoroethylene. In this study, we discuss the thermal response as a function of the incident excitation laser power and model the dominant cooling contributions. Our results provide a basis for laser heating as a viable approach for TINS, nanoscale thermal transport measurements, and thermal desorption nano-spectroscopy.},
doi = {10.1063/1.4972048},
journal = {APL Photonics},
number = 2,
volume = 2,
place = {United States},
year = {2016},
month = {12}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
DOI: 10.1063/1.4972048

Citation Metrics:
Cited by: 7 works
Citation information provided by
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