Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group

Geometrical renormalization approach to calculating optical properties of fractal carbonaceous soot

Not Accessible

Your library or personal account may give you access

Abstract

We develop a theoretical approach to calculating optical properties of carbonaceous soot in the long-wavelength limit. Our method is based on geometrical renormalization of clusters; it avoids both the inaccuracy of the dipole approximation in its pure form and the numerical complexity of rigorous direct methods of solving the EM boundary problem. The results are verified by comparison with the experimental measurements for specific extinction of diesel soot in the spectral region from 0.488 µm to 0.857 cm that were performed by Bruce et al. [Appl. Opt. 30, 1537 (1991)]. The theory leads to analytical expressions that are applicable to different soots, with various geometrical properties and optical constants. We show that the functional form of the long-wavelength asymptote of the specific extinction can depend critically on a parameter characterizing the sample geometry, and we identify the critical value of this parameter.

© 2001 Optical Society of America

Full Article  |  PDF Article
More Like This
Internal fields of soot fractal aggregates

Matthew J. Berg and Christopher M. Sorensen
J. Opt. Soc. Am. A 30(10) 1947-1955 (2013)

Empirical relationships between optical properties and equivalent diameters of fractal soot aggregates at 550 nm wavelength

Apoorva Pandey, Rajan K. Chakrabarty, Li Liu, and Michael I. Mishchenko
Opt. Express 23(24) A1354-A1362 (2015)

Wavelength-dependent optical extinction of carbonaceous particles in atmospheric aerosols and interstellar dust

Michael Quinten, Uwe Kreibig, Thomas Henning, and Harald Mutschke
Appl. Opt. 41(33) 7102-7113 (2002)

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Figures (7)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Equations (41)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Select as filters


Select Topics Cancel
© Copyright 2024 | Optica Publishing Group. All Rights Reserved