• S. A. Gaikwad

The Refractive Index and Effective Band Gap variation of wurzite AlXGa1-XN with respect to temperature with bowing parameter b=1.30.2 eV, have been studied. Refractive index found to increase for all compositions and its rate of increase is more in the vicinity of band gap. A set of values for model parameters C(x, T) and A(x, T) were obtained for different compositions and temperatures. The variations of C(x, T) and A(x, T) with compositions were found to be stronger than their corresponding temperature variations. The variation in dielectric function expressed in terms of C(x, T) and A(x, T) with respect to temperature and composition have been studied. It is found that dielectric function is nonlinearly increasing with increasing temperature and composition. This work enables us to calculate refractive index of GaN and AlGaN alloys at any desired temperature and hence to predict properties of GaN based waveguides at elevated temperatures.

Laser diode, Waveguide, Temperature drift, Effective band gap (EBG), Dielectric function.

"Temperature dependence of Effective band gap, Refractive index, Dielectric function and Model parameters C(x,T), A(x,T) of AlXGa1-XN.", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.6, Issue 6, page no.272-275, June 2019, Available :http://www.jetir.org/papers/JETIR1908344.pdf

"Temperature dependence of Effective band gap, Refractive index, Dielectric function and Model parameters C(x,T), A(x,T) of AlXGa1-XN.", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.6, Issue 6, page no. pp272-275, June 2019, Available at : http://www.jetir.org/papers/JETIR1908344.pdf