Full Color Tunable Photonic Crystal from Crystalline Colloidal Arrays with an Engineered Photonic Stop-Band

摘要

The advancement of display technology has played an important role in improving the quality of our daily lives. Due to recent growing interest in mobile and e-book devices, there are new demands for a display with excellent outdoor readability, low power consumption, and reduced eye-fatigue, which has lead to research on reflective displays.[1-3] However, significant work remains to develop a reflective display that can provide a bright and full-color image comparable to printed media with almost zero-power consumption. One promising way to realize this goal is to express full color in a single pixel, which can potentially provide a threefold increase in color brightness over a conventional display composed of red-green-blue (RGB) pixels.[4] To this end, a tunable photonic crystal has recently been demonstrated as a new class of display element, which allows the full-color emission from a single pixel under a broad range of ambient lighting conditions.[5-8] In addition, the so-called structural colors from photonic crystals have advantageous features such as brilliancy and color vividness[9,10] as is commonly observed in nature, e.g., in Morpho-butterflies and beetles.[11,12]