Cited by 2,239Terahertz technology and applicationsLaser-Matter Interactions and ApplicationsSpectroscopy and Laser Applications

Far-infrared time-domain spectroscopy with terahertz beams of dielectrics and semiconductors

Open access
Grischkowsky, D., Keiding, Søren, van Exter, Martin, Fattinger, Ch.·1990·Journal of the Optical Society of America B

Abstract

Using the method of time-domain spectroscopy, we measure the far-infrared absorption and dispersion from 0.2 to 2 THz of the crystalline dielectrics sapphire and quartz, fused silica, and the semiconductors silicon, gallium arsenide, and germanium. For sapphire and quartz, the measured absorptions are consistent with the earlier work below 0.5 THz. Above 1 THz we measure significantly more absorption for sapphire, while for quartz our values are in reasonable agreement with those of the previous work. Our results on high-purity fused silica are consistent with those on the most transparent fused silica measured to date. For the semiconductors, we show that many of the previous measurements on silicon were dominated by the effects of carriers due to impurities. For high-resistivity, 10-kΩ cm silicon, we measure a remarkable transparency together with an exceptionally nondispersive index of refraction. For GaAs our measurements extend the precision of the previous work, and we resolve two weak absorption features at 0.4 and 0.7 THz. Our measurements on germanium demonstrate the dominant role of intrinsic carriers; the measured absorption and dispersion are well fitted by the simple Drude theory.

Integrity signals

Registry

Crossref · 10.1364/josab.7.002006

Cites

43 of 43 references verified0 citation errors · 0 not checkable

Statistics

Recomputing p-values needs the paper’s full text.

Claims the paper makes

We couldn’t retrieve this paper’s full text, so its claims and self-check weren’t run. The registry and citation checks still apply.

Claims other papers make about this one

Each is checked against this paper’s own text: does it say what the citing paper says it does?

  • High-resistivity silicon is a typical reference material for THz-TDS and a good starting point to test the method.

    “High-resistivity silicon is a typical reference material for THzTDS. Several historical studies have been published since the emergence of the THz-TDS field [4, 41, 16, 42], hence this type of sample is a good starting point to test our method.”
  • Terahertz time-domain spectroscopy systems based on femtosecond lasers measure the electric field by sampling the terahertz pulse versus delay.

    “This can be done using THz time-domain spectroscopy ͑THz-TDS͒ systems based on femtosecond lasers.7 The electric field is measured by sampling the THz pulse as a function of delay, typically using a mechanical delay line.”

Cites

Flagged first, then by citations

Cited by

Sorted by citations

Authors
Grischkowsky, D., Keiding, S., van Exter, M., & Fattinger, C.
Affiliations
IBM Research - Thomas J. Watson Research Center (US)
Venue
Journal of the Optical Society of America B
Published
1990-10-01
Volume
7
Issue
10
Pages
2006
ISSN
  • 0740-3224 (ISSN-L)
  • 1520-8540
OpenAlex
W2126442445
Cited by
2,239
References
43
Citations by year
2026: 50 · 2025: 67 · 2024: 74 · 2023: 69 · 2022: 73 · 2021: 87 · 2020: 89 · 2019: 91 · 2018: 98 · 2017: 94 · 2016: 96 · 2015: 103 · 2014: 94 · 2013: 105 · 2012: 105
FWCI
15.31
Type
journal article
Language
en
Open access
Locations
  • Journal of the Optical Society of America B (publishedVersion)
  • SHAREOK (University of Oklahoma; Oklahoma State University; Central Oklahoma University) (acceptedVersion, other-oa)
  • SHAREOK (University of Oklahoma; Oklahoma State University; Central Oklahoma University) (submittedVersion, other-oa)
Topics
  • Physical Sciences › Engineering › Electrical and Electronic Engineering › Terahertz technology and applications
  • Physical Sciences › Physics and Astronomy › Atomic and Molecular Physics, and Optics › Laser-Matter Interactions and Applications
  • Physical Sciences › Chemistry › Spectroscopy › Spectroscopy and Laser Applications
Keywords
far-infrared absorption, terahertz spectroscopy, time-domain spectroscopy, dielectric materials, semiconductors, sapphire, quartz, fused silica, silicon, GaAs, germanium, refractive index dispersion, Drude model, high-purity silicon

About these checks

Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.

Statistics and arithmetic are recomputed, not judged.

Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.

What counts as a claim ›How we measure confidence ›How we check this ›

Are you an author, or do you see a problem with this page? Request a review