Effect of Sn Addition on Thermal and Optical Properties of Pb₉Se₇₁Ge_20−𝑥Sn_𝑥  (8≤𝑥≤12) Glass

Table 3

Values of refractive index (𝑛), extinction coefficient (𝑘), optical energy gap (𝐸^opt_𝑔), and real part (𝜀_𝑟) and imaginary part (𝜀_𝑖) of dielectric constant.

𝑥	𝑛	𝑘	𝐸^opt𝑔(eV)	𝜀𝑖	𝜀𝑟
8	2.21	0.0185	2.76	0.0817	4.8837
9	2.94	0.0219	2.71	0.1287	8.6431
10	3.19	0.0384	2.62	0.2449	10.1746
11	3.58	0.0515	2.56	0.3687	12.8137
12	3.71	0.0606	2.48	0.4496	13.7604