Semiconductor white LEDs (WLEDs) have penetrated every aspect of people’s daily lives and are rapidly replacing traditional artificial light sources (e.g., incandescent lamps) due to their long ...

Did you know that the world around us is filled with different types of light waves ? From the warm glow of the sun to audible radio waves and invisible gamma rays, electromagnetic waves (action ...

Reflectometry and white-light interferometry (WLI) have attracted significant attention due to their high-resolution capability in measuring thickness and topography. In this report, we demonstrated ...