This technology provides an LED design that can greatly improve polarization selectivity, 10:1, resulting in greater efficiency of the LED. The technology lies within a photonic crystal bi-refringent polarization rotator and an oxide spacer. The design blue-shifts transmission, which greatly improves overall efficiency of the LED by recycling wasted light and increasing polarization selectivity. Applications include: backlight units of liquid crystal displays, low noise sensing and high-contrast bio-imaging.
This technology relates to an ultra high efficient LED system with the capability to modify an LEDs radiation pattern by changing its physical dimension-emission beam shape. The ultra high efficiency and redistribution of light has been achieved without the use of a back reflector. The ultra high efficiency can be controlled by changing the size of the nanorods within the design. These features can be very useful for bio-sensing and bio-imaging applications.