Quantitative estimate of fs-laser induced refractive index changes in the bulk of various transparent materials

2014 ◽  
Author(s):  
A. Mermillod-Blondin ◽  
T. Seuthe ◽  
M. Eberstein ◽  
M. Grehn ◽  
J. Bonse ◽  
...  
Keyword(s):  
Refractive Index ◽  
Quantitative Estimate ◽  
Fs Laser ◽  
Index Changes ◽  
Transparent Materials

Spatially resolved measurement of femtosecond laser induced refractive index changes in transparent materials

2012 ◽  
Vol 37 (14) ◽  
pp. 3003 ◽  
Author(s):  
René Berlich ◽  
Jiyeon Choi ◽  
Clarisse Mazuir ◽  
Winston V. Schoenfeld ◽  
Stefan Nolte ◽  
...  
Keyword(s):  
Refractive Index ◽  
Femtosecond Laser ◽  
Spatially Resolved ◽  
Index Changes ◽  
Transparent Materials

Influence of temperature distribution of heat affected zone on transient refractive index modifications of transparent materials

2016 ◽  
Vol 231 (15) ◽  
pp. 2848-2854 ◽  
Author(s):  
S Najafi ◽  
AS Arabanian ◽  
R Massudi
Keyword(s):  
Refractive Index ◽  
Temperature Distribution ◽  
Heat Affected Zone ◽  
Wave Equations ◽  
Refractive Index Profile ◽  
Physical Parameters ◽  
Thermoelastic Wave ◽  
Strain Stress ◽  
Index Changes ◽  
Transparent Materials

Thermoelastic wave equations are numerically solved by using finite element method to study effect of spatial distribution of microscale heat source, created inside transparent material, on physical parameters of heat affected zone. It is observed that temperature distribution has significant effect on spatial and temporal behavior of the displacement, strain, stress and, consequently, on refractive index changes of the material. Therefore, temperature distribution, which can be caused by laser pulse, can be employed as an important parameter to control refractive index profile inside transparent materials.

New Hierarchically Structured Optical Materials for Dynamic Refractive Index Changes

2003 ◽  
Author(s):  
Bradley F. Chmelka ◽  
Earl Danielson ◽  
Michael D. Wyrsta
Keyword(s):  
Refractive Index ◽  
Optical Materials ◽  
Index Changes

LINEAR AND NONLINEAR INTERSUBBAND OPTICAL ABSORPTION OF FINITE AND INFINITE SEMI-PARABOLIC QUANTUM WELLS

2011 ◽  
Vol 25 (07) ◽  
pp. 497-507 ◽  
Author(s):  
M. J. KARIMI ◽  
A. KESHAVARZ ◽  
A. POOSTFORUSH
Keyword(s):  
Refractive Index ◽  
Optical Properties ◽  
Optical Absorption ◽  
Quantum Well ◽  
Quantum Wells ◽  
Resonant Peak ◽  
Energy Eigenvalues ◽  
Finite Case ◽  
Infinite Case ◽  
Index Changes

In this work, the optical absorption coefficients and the refractive index changes for the infinite and finite semi-parabolic quantum well are calculated. Numerical calculations are performed for typical GaAs / Al x Ga 1-x As semi-parabolic quantum well. The energy eigenvalues and eigenfunctions of these systems are calculated numerically. Optical properties are obtained using the compact density matrix approach. Results show that the energy eigenvalues and the matrix elements of the infinite and finite cases are different. The calculations reveal that the resonant peaks of the optical properties of the finite case occur at lower values of the incident photon energy with respect to the infinite case. Results indicate that the maximum value of the refractive index changes for the finite case are greater than that of the infinite case. Our calculations also show that in contrast to the infinite case, the resonant peak value of the total absorption coefficient in the case of the finite well is a non-monotonic function of the semi-parabolic confinement frequency.

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