Birefringence measurements

2010-11-22 랩미팅

Al2O3, thickness: 0.5 mm

Time domain signal

Phase retardation Refractive index

@ 1 THzMeasured

refractive indices Calculated

refractive indices

n1 n2 Δn n1 n3 Δn

LiF 3.145 0 2.86 0

CaF2 2.680 0 … 0

TiO2 (Ru-tile)

@ 0.9 THz13.060 9.493 3.567 81.33 16.96 64.37

LiNbO3 4.130 3.246 0.884 6.58 4.83 1.75

Calcite 3.030 2.997 0.033 2.89 2.59 0.3

Quartz 2.220 2.284 -0.064 2.09 2.13 -0.04

Al2O3 3.072 3.389 -0.317 2.88 3.19 -0.31

Cubic structure

Tetragonal structure

Trigonal structure

Measured and calculated refractive indices