- Exercise Lambertian Reflectors In Leds Assume A Lambertian Reflector With Reflectivity 1 0 That Is Incorporated In A L 1 (180.71 KiB) Viewed 32 times
Exercise: Lambertian reflectors in LEDs. Assume a lambertian reflector with reflectivity 1.0 that is incorporated in a lossless GaAs LED structure with refractive index of 3.5. Assume that the outside medium is air. Calculate the critical angle of the escape cone, the probability that a reflected light ray falls within the escape cone and the average number of reflection events before a photon escapes from the high-index GaAs layer. Would a hypothetical planar reflector that reflected light coming from any incoming direction towards the surface normal be useful? Is there a physical principle that prevents a reflector from reflecting light in such a way?