Ultra-directional and high-efficiency $\hat{I}¼$LEDs via gradient index filled micro-Horn collimators

Alexander Luce, Rasoul Alaee, Aimi Abass

Micro-LEDs ($\hat{I}¼$LEDs) are poised to transform AR/VR, display, and optical communication technologies, but they are currently hindered by low light extraction efficiency and non-dir…