  One-dimensional photonic crystals (1D PC) represent a class of periodic
optical material, composed of alternating media with different dielectric
constants along one direction. The most important property of 1D PCs is their
photonic band-gap. However, multiple reflective bands are rarely reported in
this research area. In this paper we demonstrate the tunability of multiple
reflective bands in conventional 1D PC structure and 1D PC heterostructure. For
both two types of 1D PC construction, positions of multiple reflective bands
can be regulated under certain principles. In addition, structural color is
revealed by transforming reflection spectra into CIE coordinates. It is
indicated that the CIE coordinate shifts caused by multiple reflective bands
behave quite different compared to those caused by one major photonic band-gap.
The two approaches reported in this work may provide insights for the
application of 1D PC in areas such as displays, sensors, and decoration.
