Measurements of Light Extinction by Single Aerosol Particles

Jim S. Walker; Antonia E. Carruthers; Andrew J. Orr-Ewing; Jonathan P. Reid

doi:10.1021/jz4008068

Measurements of Light Extinction by Single Aerosol Particles

Jim S. Walker, Antonia E. Carruthers, Andrew J. Orr-Ewing^*, Jonathan P. Reid

^*Corresponding author for this work

Research output: Contribution to journal › Article (Academic Journal) › peer-review

40 Citations (Scopus)

694 Downloads (Pure)

Abstract

A Bessel beam optical trap is combined with continuous wave cavity ringdown spectroscopy to measure the extinction cross section of individual aerosol particles. Particles, similar to 1 mu m in size, can be captured indefinitely and processes that transform size or refractive index studied. The measured light extinction induced by the particle is shown to depend on the position of the particle in the cavity, allowing accurate measurements of the mode structure of a high finesse optical cavity without significant perturbation. The variation in extinction efficiency of a sodium chloride droplet with relative humidity is shown to agree well with predictions from Mie scattering theory.

Original language	English
Pages (from-to)	1748-1752
Number of pages	5
Journal	Journal of Physical Chemistry Letters
Volume	4
Issue number	10
DOIs	https://doi.org/10.1021/jz4008068
Publication status	Published - 16 May 2013

Keywords

CAVITY RING-DOWN
OPTICAL-PROPERTIES
REFRACTIVE-INDEX
SALT AEROSOLS
SCATTERING
SPECTROSCOPY
SPECTROMETER

Access to Document

10.1021/jz4008068

Single aerosol CRDS JPCLett 2013
This document is the Accepted Manuscript version of a Published Work that appeared in final form in J. Phys. Chem. Lett., 2013, 4 (10), pp 1748–1752, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see http://pubs.acs.org/page/policy/articlesonrequest/index.html
Accepted author manuscript, 518 KB

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40 Citations
1 Article (Academic Journal)

Deviations from plane-wave mie scattering and precise retrieval of refractive index for a single spherical particle in an optical cavity
Mason, B. J., Walker, J. S., Reid, J. P. & Orr-Ewing, A. J., 20 Mar 2014, In: Journal of Physical Chemistry A. 118, 11, p. 2083-2088 6 p.
Research output: Contribution to journal › Article (Academic Journal) › peer-review

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21 Citations (Scopus)

549 Downloads (Pure)

2 Finished

A Novel Instrument for Characterising the Properties and Processes of Single Accumulation Mode Aerosol Particles
Reid, J. P. (Principal Investigator) & Orr-Ewing, A. J. (Researcher)
1/03/10 → 1/03/12
Project: Research
NEW STRATEGIES FOR SAMPLING, ANALYSING AND UNDERSTANDING AEROSOLS
Reid, J. P. (Principal Investigator)
1/03/09 → 1/09/14
Project: Research

Cite this

@article{ec5f576e6a6f4149824a45a691c2e157,

title = "Measurements of Light Extinction by Single Aerosol Particles",

abstract = "A Bessel beam optical trap is combined with continuous wave cavity ringdown spectroscopy to measure the extinction cross section of individual aerosol particles. Particles, similar to 1 mu m in size, can be captured indefinitely and processes that transform size or refractive index studied. The measured light extinction induced by the particle is shown to depend on the position of the particle in the cavity, allowing accurate measurements of the mode structure of a high finesse optical cavity without significant perturbation. The variation in extinction efficiency of a sodium chloride droplet with relative humidity is shown to agree well with predictions from Mie scattering theory.",

keywords = "CAVITY RING-DOWN, OPTICAL-PROPERTIES, REFRACTIVE-INDEX, SALT AEROSOLS, SCATTERING, SPECTROSCOPY, SPECTROMETER",

author = "Walker, {Jim S.} and Carruthers, {Antonia E.} and Orr-Ewing, {Andrew J.} and Reid, {Jonathan P.}",

year = "2013",

month = may,

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doi = "10.1021/jz4008068",

language = "English",

volume = "4",

pages = "1748--1752",

journal = "Journal of Physical Chemistry Letters",

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T1 - Measurements of Light Extinction by Single Aerosol Particles

AU - Walker, Jim S.

AU - Carruthers, Antonia E.

AU - Orr-Ewing, Andrew J.

AU - Reid, Jonathan P.

PY - 2013/5/16

Y1 - 2013/5/16

N2 - A Bessel beam optical trap is combined with continuous wave cavity ringdown spectroscopy to measure the extinction cross section of individual aerosol particles. Particles, similar to 1 mu m in size, can be captured indefinitely and processes that transform size or refractive index studied. The measured light extinction induced by the particle is shown to depend on the position of the particle in the cavity, allowing accurate measurements of the mode structure of a high finesse optical cavity without significant perturbation. The variation in extinction efficiency of a sodium chloride droplet with relative humidity is shown to agree well with predictions from Mie scattering theory.

AB - A Bessel beam optical trap is combined with continuous wave cavity ringdown spectroscopy to measure the extinction cross section of individual aerosol particles. Particles, similar to 1 mu m in size, can be captured indefinitely and processes that transform size or refractive index studied. The measured light extinction induced by the particle is shown to depend on the position of the particle in the cavity, allowing accurate measurements of the mode structure of a high finesse optical cavity without significant perturbation. The variation in extinction efficiency of a sodium chloride droplet with relative humidity is shown to agree well with predictions from Mie scattering theory.

KW - CAVITY RING-DOWN

KW - OPTICAL-PROPERTIES

KW - REFRACTIVE-INDEX

KW - SALT AEROSOLS

KW - SCATTERING

KW - SPECTROSCOPY

KW - SPECTROMETER

U2 - 10.1021/jz4008068

DO - 10.1021/jz4008068

M3 - Article (Academic Journal)

C2 - 26282989

SN - 1948-7185

VL - 4

SP - 1748

EP - 1752

JO - Journal of Physical Chemistry Letters

JF - Journal of Physical Chemistry Letters

IS - 10

ER -

Measurements of Light Extinction by Single Aerosol Particles

Abstract

Keywords

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Research output

Deviations from plane-wave mie scattering and precise retrieval of refractive index for a single spherical particle in an optical cavity

Projects

A Novel Instrument for Characterising the Properties and Processes of Single Accumulation Mode Aerosol Particles

NEW STRATEGIES FOR SAMPLING, ANALYSING AND UNDERSTANDING AEROSOLS

Cite this