Tip-Enhanced Stokes–Anti-Stokes Scattering from Carbyne

Carbyne, a linear chain of carbon atoms, is the truly one-dimensional allotrope of carbon and the strongest known Raman scatterer. Here, we use tip-enhanced Raman scattering (TERS) to further enhance the Raman response of a single carbyne chain confined inside a double-walled carbon nanotube. We obs...

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Bibliographic Details
Published inNano letters Vol. 22; no. 8; pp. 3260 - 3265
Main Authors Tschannen, Cla Duri, Frimmer, Martin, Vasconcelos, Thiago L, Shi, Lei, Pichler, Thomas, Novotny, Lukas
Format Journal Article
LanguageEnglish
Published United States American Chemical Society 27.04.2022
Subjects
Carbamates
Lasers
Letter
Light
Spectrum Analysis, Raman - methods
Vibration
carbyne
anti-Stokes
Raman scattering
TERS
carbon chain
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ISSN1530-6984
1530-6992
1530-6992
DOI10.1021/acs.nanolett.2c00154

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Summary:Carbyne, a linear chain of carbon atoms, is the truly one-dimensional allotrope of carbon and the strongest known Raman scatterer. Here, we use tip-enhanced Raman scattering (TERS) to further enhance the Raman response of a single carbyne chain confined inside a double-walled carbon nanotube. We observe an increase of the anti-Stokes scattering by a factor of 3290 and a 22-fold enhancement of the anti-Stokes/Stokes ratio relative to far-field measurements. The power dependence of the anti-Stokes/Stokes ratio under TERS conditions is indicative of coherent Stokes–anti-Stokes scattering mediated by an excited phonon. The role of resonance effects and laser-induced heating are discussed and potential opportunities are outlined.
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ISSN:1530-6984
1530-6992
1530-6992
DOI:10.1021/acs.nanolett.2c00154