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dc.contributor.author
Hermans, Rodolfo I.
dc.contributor.author
Seddon, James
dc.contributor.author
Shams, Haymen
dc.contributor.author
Ponnampalam, Lalitha
dc.contributor.author
Seeds, Alwyn J.
dc.contributor.author
Aeppli, Gabriel
dc.date.accessioned
2020-11-20T10:59:26Z
dc.date.available
2020-11-20T05:50:09Z
dc.date.available
2020-11-20T10:25:59Z
dc.date.available
2020-11-20T10:59:26Z
dc.date.issued
2020-10-20
dc.identifier.issn
2334-2536
dc.identifier.other
10.1364/OPTICA.397506
en_US
dc.identifier.uri
http://hdl.handle.net/20.500.11850/452107
dc.identifier.doi
10.3929/ethz-b-000452107
dc.description.abstract
A novel technique for high-resolution 1.5 µm photonics-enabled terahertz (THz) spectroscopy using software control of the illumination spectral line shape (SLS) is presented. The technique enhances the performance of a continuous-wave THz spectrometer to reveal previously inaccessible details of closely spaced spectral peaks. We demonstrate the technique by performing spectroscopy on LiYF4:Ho3+, a material of interest for quantum science and technology, where we discriminate between inhomogeneous Gaussian and homogeneous Lorentzian contributions to absorption lines near 0.2 THz. Ultra-high-resolution (<100 Hz full-width at half maximum) frequency-domain spectroscopy with quality factor Q > 2 × 109 is achieved using an exact frequency spacing comb source in the optical communications band, with a custom uni-traveling-carrier photodiode mixer and coherent down-conversion detection. Software-defined time-domain modulation of one of the comb lines is demonstrated and used to resolve the sample SLS and to obtain a magnetic field-free readout of the electronuclear spectrum for the Ho3+ ions in LiYF4:Ho3+. In particular, homogeneous and inhomogeneous contributions to the spectrum are readily separated. The experiment reveals previously unmeasured information regarding the hyperfine structure of the first excited state in the 5 I8 manifold complementing the results reported in Phys. Rev. B 94, 205132 (2016).
en_US
dc.format
application/pdf
en_US
dc.language.iso
en
en_US
dc.publisher
Optical Society of America
en_US
dc.rights.uri
http://creativecommons.org/licenses/by/4.0/
dc.title
Ultra-high-resolution software-defined photonic terahertz spectroscopy
en_US
dc.type
Journal Article
dc.rights.license
Creative Commons Attribution 4.0 International
dc.date.published
2020-10-16
ethz.journal.title
Optica
ethz.journal.volume
7
en_US
ethz.journal.issue
10
en_US
ethz.pages.start
1445
en_US
ethz.pages.end
1455
en_US
ethz.version.deposit
publishedVersion
en_US
ethz.grant
Hidden, entangled and resonating orders/HERO
en_US
ethz.identifier.wos
ethz.identifier.scopus
ethz.publication.place
Washington, DC
en_US
ethz.publication.status
published
en_US
ethz.grant.agreementno
810451
ethz.grant.fundername
EC
ethz.grant.funderDoi
10.13039/501100000780
ethz.grant.program
H2020
ethz.date.deposited
2020-11-20T05:50:14Z
ethz.source
SCOPUS
ethz.eth
yes
en_US
ethz.availability
Open access
en_US
ethz.rosetta.installDate
2020-11-20T10:26:14Z
ethz.rosetta.lastUpdated
2021-02-15T20:51:44Z
ethz.rosetta.versionExported
true
ethz.COinS
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