Monte Carlo simulation of photon transport in a scattering-dominated medium with a refractive index gradient for acoustic light-guiding

被引:0
|
作者
Yamamura, Naoto [1 ]
Okada, Eiji [2 ]
Nakagawa, Keiichi [3 ,4 ]
Takagi, Shu [1 ,3 ]
机构
[1] Univ Tokyo, Dept Mech Engn, 7-3-1 Hongo,Bunkyo Ku, Tokyo, Japan
[2] Keio Univ, Dept Elect & Elect Engn, 3-14-1 Hiyoshi, Yokohama, Kanagawa, Japan
[3] Univ Tokyo, Dept Bioengn, 7-3-1 Hongo,Bunkyo Ku, Tokyo, Japan
[4] Univ Tokyo, Dept Precis Engn, 7-3-1 Hongo,Bunkyo Ku, Tokyo, Japan
来源
OPTICS CONTINUUM | 2022年 / 1卷 / 04期
关键词
OPTICAL-PROPERTIES; BIOLOGICAL TISSUES; SKIN; TEMPERATURE; TOMOGRAPHY;
D O I
10.1364/OPTCON.453564
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
Acoustic light waveguides use a technology that employs acoustic waves to create pressure-dependent refractive index distribution and guide light deep into biological tissue similar to an optical fiber. The method by which acoustic optical waveguides increase light transmission in biological tissues occurring inside scattering-dominated medium has not been clarified. To understand the phenomena occurring inside the scattering-dominated medium, we performed Monte Carlo simulations of photon transport in acoustic optical waveguides. The findings indicate that the larger the change in the refractive index in the scattering-dominated media, the greater the effect of photon confinement. In addition, as the refractive index gradient was increased, the near-field internal fluence was found to be greatly enhanced. The transition depth, which indicates the region where the internal fluence is enhanced by the refractive index gradient, was determined as a function of the radius at which the refractive index change is given. (c) 2022 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement
引用
收藏
页码:846 / 859
页数:14
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