A measurement method of the intrinsic optical absorption spectrum of 1D nanomaterials and its application to erbium chloride silicate nanowires

Leijun Yin, Hao Sun, Cun-Zheng Ning

Research output: Contribution to journalArticle

Abstract

Measurement of the absolute absorption coefficient of various nanomaterials over a wide spectral range is important for a variety of photonic applications but is very challenging due to strong scatterings from the intrinsically granular features of nanomaterials. We report in this paper a two-step method to determine the absorption spectrum on the absolute scale for an ensemble of nanowires: first, the relative absorption spectrum over a wide spectral range is measured from the nanowire ensemble in a carefully designed experiment using integrating sphere. Second, the absorption coefficient at a single wavelength is measured on a single nanowire to serve as the calibration of the relative spectrum. The combination of the two measurements allows the determination of the absolute absorption spectrum over a wide range. We then apply this measurement strategy to a relatively new class of nanowire materials, the erbium compound (erbium chloride silicate (ECS)) nanowires to determine its absorption spectrum. The absorption coefficient in a wide spectral range from near infrared to visible was determined for the first time for this unique erbium compound material. The measurement strategy is generally applicable to other 1D nanomaterials. The precise determination of the ECS absorption spectrum in such a wide spectral range is of vital importance to various applications of ECS nanowires including nanolasers, solar cells, and nanoscale amplifiers.

Original languageEnglish (US)
Article number454003
JournalNanotechnology
Volume29
Issue number45
DOIs
StatePublished - Sep 14 2018

Fingerprint

Silicates
Erbium
Nanostructured materials
Light absorption
Nanowires
Absorption spectra
Erbium compounds
Photonics
erbium chloride
Solar cells
Calibration
Scattering
Infrared radiation
Wavelength

Keywords

  • erbium
  • nanomaterials
  • optical absorption

ASJC Scopus subject areas

  • Bioengineering
  • Chemistry(all)
  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering
  • Electrical and Electronic Engineering

Cite this

A measurement method of the intrinsic optical absorption spectrum of 1D nanomaterials and its application to erbium chloride silicate nanowires. / Yin, Leijun; Sun, Hao; Ning, Cun-Zheng.

In: Nanotechnology, Vol. 29, No. 45, 454003, 14.09.2018.

Research output: Contribution to journalArticle

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