Ultra-Sensitive Extinction Measurements of Optically Active Defects in Monolayer MoS2

Florian Sigger; Ines Amersdorffer; Alexander Hötger; Manuel Nutz; Jonas Kiemle; Takashi Taniguchi; Kenji Watanabe; Michael Förg; Jonathan Noe; Jonathan J. Finley; Alexander Högele; Alexander W. Holleitner; Thomas Hümmer; David Hunger; Christoph Kastl

doi:10.1021/acs.jpclett.2c02386

Ultra-Sensitive Extinction Measurements of Optically Active Defects in Monolayer MoS₂

Florian Sigger, Ines Amersdorffer, Alexander Hötger, Manuel Nutz, Jonas Kiemle, Takashi Taniguchi, Kenji Watanabe, Michael Förg, Jonathan Noe, Jonathan J. Finley, Alexander Högele, Alexander W. Holleitner, Thomas Hümmer, David Hunger, Christoph Kastl

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4 Scopus citations

Abstract

We utilize cavity-enhanced extinction spectroscopy to directly quantify the optical absorption of defects in MoS₂generated by helium ion bombardment. We achieve hyperspectral imaging of specific defect patterns with a detection limit below 0.01% extinction, corresponding to a detectable defect density below 1 × 10¹¹cm^-2. The corresponding spectra reveal a broad subgap absorption, being consistent with theoretical predictions related to sulfur vacancy-bound excitons in MoS₂. Our results highlight cavity-enhanced extinction spectroscopy as efficient means for the detection of optical transitions in nanoscale thin films with weak absorption, applicable to a broad range of materials.

Original language	English
Pages (from-to)	10291-10296
Number of pages	6
Journal	Journal of Physical Chemistry Letters
Volume	13
Issue number	44
DOIs	https://doi.org/10.1021/acs.jpclett.2c02386
State	Published - 10 Nov 2022

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Sigger, F., Amersdorffer, I., Hötger, A., Nutz, M., Kiemle, J., Taniguchi, T., Watanabe, K., Förg, M., Noe, J., Finley, J. J., Högele, A., Holleitner, A. W., Hümmer, T., Hunger, D., & Kastl, C. (2022). Ultra-Sensitive Extinction Measurements of Optically Active Defects in Monolayer MoS₂. Journal of Physical Chemistry Letters, 13(44), 10291-10296. https://doi.org/10.1021/acs.jpclett.2c02386

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title = "Ultra-Sensitive Extinction Measurements of Optically Active Defects in Monolayer MoS2",

abstract = "We utilize cavity-enhanced extinction spectroscopy to directly quantify the optical absorption of defects in MoS2generated by helium ion bombardment. We achieve hyperspectral imaging of specific defect patterns with a detection limit below 0.01% extinction, corresponding to a detectable defect density below 1 × 1011cm-2. The corresponding spectra reveal a broad subgap absorption, being consistent with theoretical predictions related to sulfur vacancy-bound excitons in MoS2. Our results highlight cavity-enhanced extinction spectroscopy as efficient means for the detection of optical transitions in nanoscale thin films with weak absorption, applicable to a broad range of materials.",

author = "Florian Sigger and Ines Amersdorffer and Alexander H{\"o}tger and Manuel Nutz and Jonas Kiemle and Takashi Taniguchi and Kenji Watanabe and Michael F{\"o}rg and Jonathan Noe and Finley, {Jonathan J.} and Alexander H{\"o}gele and Holleitner, {Alexander W.} and Thomas H{\"u}mmer and David Hunger and Christoph Kastl",

year = "2022",

month = nov,

day = "10",

doi = "10.1021/acs.jpclett.2c02386",

language = "English",

volume = "13",

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journal = "Journal of Physical Chemistry Letters",

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Sigger, F, Amersdorffer, I, Hötger, A, Nutz, M, Kiemle, J, Taniguchi, T, Watanabe, K, Förg, M, Noe, J, Finley, JJ, Högele, A, Holleitner, AW, Hümmer, T, Hunger, D & Kastl, C 2022, 'Ultra-Sensitive Extinction Measurements of Optically Active Defects in Monolayer MoS₂', Journal of Physical Chemistry Letters, vol. 13, no. 44, pp. 10291-10296. https://doi.org/10.1021/acs.jpclett.2c02386

TY - JOUR

T1 - Ultra-Sensitive Extinction Measurements of Optically Active Defects in Monolayer MoS2

AU - Sigger, Florian

AU - Amersdorffer, Ines

AU - Hötger, Alexander

AU - Nutz, Manuel

AU - Kiemle, Jonas

AU - Taniguchi, Takashi

AU - Watanabe, Kenji

AU - Förg, Michael

AU - Noe, Jonathan

AU - Finley, Jonathan J.

AU - Högele, Alexander

AU - Holleitner, Alexander W.

AU - Hümmer, Thomas

AU - Hunger, David

AU - Kastl, Christoph

PY - 2022/11/10

Y1 - 2022/11/10

N2 - We utilize cavity-enhanced extinction spectroscopy to directly quantify the optical absorption of defects in MoS2generated by helium ion bombardment. We achieve hyperspectral imaging of specific defect patterns with a detection limit below 0.01% extinction, corresponding to a detectable defect density below 1 × 1011cm-2. The corresponding spectra reveal a broad subgap absorption, being consistent with theoretical predictions related to sulfur vacancy-bound excitons in MoS2. Our results highlight cavity-enhanced extinction spectroscopy as efficient means for the detection of optical transitions in nanoscale thin films with weak absorption, applicable to a broad range of materials.

AB - We utilize cavity-enhanced extinction spectroscopy to directly quantify the optical absorption of defects in MoS2generated by helium ion bombardment. We achieve hyperspectral imaging of specific defect patterns with a detection limit below 0.01% extinction, corresponding to a detectable defect density below 1 × 1011cm-2. The corresponding spectra reveal a broad subgap absorption, being consistent with theoretical predictions related to sulfur vacancy-bound excitons in MoS2. Our results highlight cavity-enhanced extinction spectroscopy as efficient means for the detection of optical transitions in nanoscale thin films with weak absorption, applicable to a broad range of materials.

UR - http://www.scopus.com/inward/record.url?scp=85141476906&partnerID=8YFLogxK

U2 - 10.1021/acs.jpclett.2c02386

DO - 10.1021/acs.jpclett.2c02386

M3 - Article

C2 - 36305703

AN - SCOPUS:85141476906

SN - 1948-7185

VL - 13

SP - 10291

EP - 10296

JO - Journal of Physical Chemistry Letters

JF - Journal of Physical Chemistry Letters

IS - 44

ER -

Ultra-Sensitive Extinction Measurements of Optically Active Defects in Monolayer MoS₂

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