00000cab a22000004cb4500 IPP-00000457711 IPP 20201023114030.0 201023s2014 xx d | ||r |||||eng|| eng Jose, Ameera A. Transfer matrix simulation of reflectivity of distributed Bragg Reflectors (DBRs) 2014 A dialectric mirror known as distributed Bragg reflector (DBR) is commonly used as an essential element of an opto-electronic device. Opto-electronic devices such as lasers and LEDs provide great importance in recent technologies. With the aim of exploring technology as well as for pre-fabrication process of this mirror, computer simulation was implemented in order to identify the desired optical properties. In this study, four (4) DBR samples were examined, namely: GaAs/A1As, A1N/A10.23Ga0.77N, SiO2/HfO2, and ZnO/MgO. The researcher applied the transfer matrix method (TMM) technique to numerically simulate the reflectivity and angle-resolved reflectivity at different incident angles, specifically: θ_i=0°, 15° ,30° ,45° , and 60°. TMM technique calculates the reflectivity of the samples in a specified wavelength band (ranging from infrared to blue-UV spectral range). Parameters such as indices of refraction (n), center wavelength (λ_c), an incident angle (θ_i), and the number of pairs (N), were varied in the program. The four mirrors were compared according to the highest achieved reflectivity and spectral broadness at a given λ _c. The results showed that GaAs/A1As operates well in the infrared region (λ _c=885nm) with a reflectivity of R= 99.55% at N= 20 pairs. Materials in blue-UV range were also highly reflective at λ _c = 380nm. For A1N/A10.23Ga0.77N material, maximum reflectivity reached R = 94.2% at N = 30 pairs; SiO2/HfO2 and ZnO/MgO materials obtained R =97.1% and R =99.3%, respectively, with the least N = 9 pairs. For blue-UV range samples, ZnO/MgO had the highest reflectivity followed by SiO2/HfO2 and A1N/A10.23Ga0.77N. Finally, based from simulation, the study concluded that DBRs of different kinds have excellent optical properties depending on the nature and kind of materials used. Bragg mirrors Physics Transfer matrix method Mindanao studies The Western Mindanao State University Research Journal Vol. 33, no. 1 (Jan. 2014 - Jun. 2014), 1-19 Article FI