Martelli Fabrizio, Del Bianco Samuele, Zaccanti Giovanni
Dipartimento di Fisica dell'Università degli Studi di Firenze and Istituto Nazionale per la Fisica della Materia, Via G. Sansone 1,50019 Sesto Fiorentino, Firenze, Italy.
Phys Rev E Stat Nonlin Soft Matter Phys. 2004 Jul;70(1 Pt 1):011907. doi: 10.1103/PhysRevE.70.011907. Epub 2004 Jul 12.
The effect of the refractive index mismatch on light propagation through diffusive layers has been investigated. The refractive index mismatch changes the balance of energy inside the medium determining a temporal and spatial redistribution of light. Light penetration through the medium is obstructed (facilitated) by a negative (positive) refractive index step variation. An analytical solution of the time-dependent diffusion equation that accounts for this effect has been obtained. The solution has been validated by comparisons with the results of Monte Carlo simulations. An excellent description of light propagation is given even for a high refractive index mismatch.
研究了折射率失配对光在扩散层中传播的影响。折射率失配改变了介质内部的能量平衡，从而决定了光的时空重新分布。负（正）折射率阶跃变化会阻碍（促进）光穿透介质。已获得考虑此效应的与时间相关的扩散方程的解析解。通过与蒙特卡罗模拟结果进行比较，验证了该解。即使对于高折射率失配，也能很好地描述光的传播。
