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To achieve a very low refractive index, silica nanorods are deposited at an angle of precisely 45 degrees on top of a thin film of aluminum nitride.https://www.led-professional.com/media/technology_light-generation_rensselaer-researchers-create-worlds-first-ideal-anti-reflection-coating_coat2-gif/viewhttps://www.led-professional.com/media/technology_light-generation_rensselaer-researchers-create-worlds-first-ideal-anti-reflection-coating_coat2-gif/@@images/image-1200-c2463b19b6a4b308291a2df1f5995636.png
To achieve a very low refractive index, silica nanorods are deposited at an angle of precisely 45 degrees on top of a thin film of aluminum nitride.
