Photonic band gap materials have the ability to modulate light. When they can be dynamically controlled beyond static modulation, their versatility improves and they become very useful in scientific and industrial applications. The quality of photonic band gap materials depends on the tunable wavelength range, dynamic controllability, and wavelength selectivity in response to external cues. In this paper, we demonstrate an electrically tunable photonic band gap material that covers a wide range (241 nm) in the visible spectrum and is based on a monodomain blue-phase liquid crystal stabilized by nonmesogenic and chiral mesogenic monomers. With this approach, we can accurately tune a reflection wavelength that possesses a narrow bandwidth (27 nm) even under a high electric field. The switching is fully reversible owing to a relatively small hysteresis with a fast response time, and it also shows a wider viewing angle than that of cholesteric liquid crystals. We believe that the proposed material has the potential to tune color filters and bandpass filters.

光子带隙材料具有调制光的能力。当可以通过静态调制方式对它们进行动态控制时，它们的多功能性将提高，并且在科学和工业应用中将变得非常有用。光子带隙材料的质量取决于可调谐的波长范围，动态可控制性以及响应外部信号的波长选择性。在本文中，我们演示了一种电可调光子带隙材料，该材料在可见光谱范围内覆盖很宽的范围（241 nm），并且基于由非介晶和手性介晶单体稳定的单畴蓝相液晶。通过这种方法，即使在高电场下，我们也可以精确地调整具有窄带宽（27 nm）的反射波长。由于具有相对较小的磁滞和快速的响应时间，该切换是完全可逆的，并且与胆甾型液晶相比，它还显示了更宽的视角。我们相信，所提出的材料具有调谐彩色滤光片和带通滤光片的潜力。