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Multidimensional Triple Sum-Frequency Spectroscopy of MoS2 and Comparisons with Absorption and Second Harmonic Generation Spectroscopies

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Darien J. Morrow, Daniel D. Kohler, Kyle J. Czech, John C. Wright

Optics · Submitted 17 May 2018

abstract compiled · 2026-09-23 · no language-model review

The authors' main claim Our results validate previous assignments of the C feature to a large joint density of states created by band nesting.

how it is stated · asserted 1.00 read the record →

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arXiv ID1805.06985 (version 3)
Pith IDXDYNVLH7, Pith's permanent record of this paper and its review
CitationDaniel D. Kohler, Darien J. Morrow, John C. Wright, Kyle J. Czech. "Multidimensional Triple Sum-Frequency Spectroscopy of MoS2 and Comparisons with Absorption and Second Harmonic Generation Spectroscopies." arXiv:1805.06985 (2018). https://pith.science/paper/XDYNVLH7
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The paper's own sentences, arranged. Each label is drawn from a closed vocabulary; the number beside it is the probability the classifier gave that label. Numbers in the tables are the authors', checked by code. No sentence in this record was written by a model.

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Compiled by classifier-1.13.0 via TypeSafe API, question bank abstract-p1-20260923, 2026-09-23: 1 request, 5,488 input tokens.

What the abstract itself states, as probabilities: claims first 0.93 · states limitation 0.09 · human participants 0.01 · controlled comparison 0.17 · randomized assignment 0.01 · states quantitative result 0.06 · compares with prior results 0.96 · mentions code or data availability 0.02.

The abstract, sentence by sentence

arXiv listing abstract v3. Results and the main claim are underlined; .

Triple sum-frequency (TSF) spectroscopy is a recently-developed methodology that enables collection of multidimensional spectra by resonantly exciting multiple quantum coherences of vibrational and electronic states. This work reports the first application of TSF to the electronic states of semiconductors. Two independently tunable ultrafast pulses excite the A, B, and C features of a MoS2 thin film. The measured TSF spectrum differs markedly from absorption and second harmonic generation spectra. The differences arise because of the relative importance of transition moments and the joint density of states. We develop a simple model and globally fit the absorption and harmonic generation spectra to extract the joint density of states and the transition moments from these spectra. Our results validate previous assignments of the C feature to a large joint density of states created by band nesting.

background contribution method result interpretation main claim

What the classifier reports for each sentence. The number is the probability it gave the label.
#sentencerolethe authors' own workstates the main conclusionstrength
s0 Triple sum-frequency (TSF) spectroscopy is a recently-developed methodology that enables collection of multidimensional spectra by resonantly exciting multiple quantum coherences of vibrational and electronic states. background 0.99 0.07 0.04 asserted 1.00
s1 This work reports the first application of TSF to the electronic states of semiconductors. contribution 0.98 0.89 0.14 asserted 1.00
s2 Two independently tunable ultrafast pulses excite the A, B, and C features of a MoS2 thin film. method 0.93 0.90 0.04 asserted 1.00
s3 The measured TSF spectrum differs markedly from absorption and second harmonic generation spectra. result 1.00 0.92 0.24 asserted 1.00
s4 The differences arise because of the relative importance of transition moments and the joint density of states. interpretation 0.99 0.76 0.28 asserted 1.00
s5 We develop a simple model and globally fit the absorption and harmonic generation spectra to extract the joint density of states and the transition moments from these spectra. method 0.94 0.96 0.09 asserted 1.00
s6 Our results validate previous assignments of the C feature to a large joint density of states created by band nesting. interpretation 0.72 0.75 0.37 asserted 1.00

What kind of paper the classifier reports this is: empirical study 0.97 · evidence from observation or experiment 1.00.

What was examined, and what was not

sources read
  • arXiv listing abstract v3
not examined
  • full text
  • figures and tables
  • references and citing sentences
  • relations to other papers
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  • P abstract
not run
  • S sections
  • T body sentences
  • C citations
  • R cross-paper relations

Every quoted sentence on this record is the authors'. Every label is from Pith's closed vocabulary, with the probability shown beside it. Every number in the measurements table is the authors', checked by code. Record as JSON

The paper
Original abstract

Triple sum-frequency (TSF) spectroscopy is a recently-developed methodology that enables collection of multidimensional spectra by resonantly exciting multiple quantum coherences of vibrational and electronic states. This work reports the first application of TSF to the electronic states of semiconductors. Two independently tunable ultrafast pulses excite the A, B, and C features of a MoS2 thin film. The measured TSF spectrum differs markedly from absorption and second harmonic generation spectra. The differences arise because of the relative importance of transition moments and the joint density of states. We develop a simple model and globally fit the absorption and harmonic generation spectra to extract the joint density of states and the transition moments from these spectra. Our results validate previous assignments of the C feature to a large joint density of states created by band nesting.

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