The present invention is directed to brush block copolymer compositions comprising first and second homopolymers or random copolymers whose presence provides access to photonic bandgaps in the infrared frequency range, their use in this capacity, and methods of making the same. The specific parameters associated with these compositions are described within the specification.
 This invention was made with government support under Grant No. CHE12127767 awarded by the National Science Foundation. The government has certain rights in the invention.
 This invention was also made with State of California support under California Energy Commission Grant No. 57642A/13-02. The Energy Commission has certain rights to this invention.