The temperature ranges where a pure
simple-cubic blue phase (BPII) emerges are quite narrow compared to
the body-centered-cubic BP (BPI) such that the polymer stabilization
of BPII is much more difficult. Hence, a polymer-stabilized BPII possessing
a wide temperature range has been scarcely reported. Here, we fabricate
a polymer-stabilized BPII over a temperature range of 50 °C including
room temperature. The fabricated polymer-stabilized BPII is confirmed
via polarized optical microscopy, Bragg reflection, and Kossel diagram
observations. Furthermore, we demonstrate reflective BP liquid-crystal
devices utilizing the reflectance–voltage performance as a
potential application of the polymer-stabilized BPII. Our work demonstrates
the possibility of practical application of the polymer-stabilized
BPII to photonic crystals
