國立虎尾科技大學 |

Nonlinear Wave Propagation and Imaging in Deterministic and Random Media.

紀錄類型:	書目-語言資料,手稿 : Monograph/item
正題名/作者:	Nonlinear Wave Propagation and Imaging in Deterministic and Random Media./
作者:	Li, Wei.
面頁冊數:	1 online resource (184 pages)
附註:	Source: Dissertation Abstracts International, Volume: 78-07(E), Section: B.
Contained By:	Dissertation Abstracts International78-07B(E).
標題:	Applied mathematics. -
電子資源:	click for full text (PQDT)
ISBN:	9781369588743

Nonlinear Wave Propagation and Imaging in Deterministic and Random Media.
Li, Wei.

Nonlinear Wave Propagation and Imaging in Deterministic and Random Media. - 1 online resource (184 pages)

Source: Dissertation Abstracts International, Volume: 78-07(E), Section: B.

Thesis (Ph.D.)

Includes bibliographical references

This thesis consists of three projects that attempt to understand and identify applications for optical scattering from small nonlinear scatterers.

Electronic reproduction.
Ann Arbor, Mich. :
ProQuest,
2018

Mode of access: World Wide Web

ISBN: 9781369588743Subjects--Topical Terms:

1069907
Applied mathematics.
Index Terms--Genre/Form:

554714
Electronic books.

Nonlinear Wave Propagation and Imaging in Deterministic and Random Media.
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245 1 0 $a Nonlinear Wave Propagation and Imaging in Deterministic and Random Media.
264 0 $c 2016
300 $a 1 online resource (184 pages)
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500 $a Source: Dissertation Abstracts International, Volume: 78-07(E), Section: B.
500 $a Advisers: Liliana Borcea; John Carl Schotland.
502 $a Thesis (Ph.D.) $c University of Michigan $d 2016.
504 $a Includes bibliographical references
520 $a This thesis consists of three projects that attempt to understand and identify applications for optical scattering from small nonlinear scatterers.
520 $a In the first part of the thesis we consider the direct scattering problem from a collection of small nonlinear scatterers. We considered all common types of quadratic and cubic nonlinearities within the scalar wave theory. We assume that the scatterers are small compared to the incident wavelength, thus the Lippman-Schwinger integral equations can be converted to algebraic equations. We further assume that the nonlinearity is weak, thus the scattering amplitudes can be calculated by solving the algebraic equations perturbatively. We apply this method to explore the redistribution of energy among the frequency components of the field, the modifications of scattering resonances and the mechanism of optical bistability for the Kerr nonlinearity.
520 $a In the second part of the thesis we generalized the optical theorem to nonlinear scattering processes. The optical theorem is a conservation law which has only been shown to hold in linear media. We show that the optical theorem holds exactly for polarizations as arbitrary functions of the electric field, which includes nonlinear media as a special case. As an application, we develop a model for apertureless near-field scanning optical microscopy. We model the sample as a collection of small linear scatterers, and introduce a nonlinear metallic scatterer as the near-field tip. We show that this imaging method is background-free and achieves subwavelength resolution. This work is done for the full Maxwell model.
520 $a In the third part of the thesis we consider the imaging of small nonlinear scatterers in random media. We analyze the problem of locating small nonlinear scatterers in weakly scattering random media which respond linearly to light. We show that for propagation distances within a few transport mean free paths, we can obtain robust images using the coherent interferometry (CINT) imaging functions. We also show that imaging the quadratic susceptibility with CINT yields better result, because that the CINT imaging function for the linear susceptibility has noisy peaks in a region that depends on the geometry of the aperture and the cone of incident directions.
533 $a Electronic reproduction. $b Ann Arbor, Mich. : $c ProQuest, $d 2018
538 $a Mode of access: World Wide Web
650 4 $a Applied mathematics. $3 1069907
655 7 $a Electronic books. $2 local $3 554714
690 $a 0364
710 2 $a ProQuest Information and Learning Co. $3 1178819
710 2 $a University of Michigan. $b Applied and Interdisciplinary Mathematics. $3 1180800
773 0 $t Dissertation Abstracts International $g 78-07B(E).
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=10391664 $z click for full text (PQDT)