The invention relates to an optical component (1) comprising a first layer (10), a second layer (20) and a bulk (50) sandwiched between said first and second layers, wherein —the bulk is formed by a composition comprising a liquid crystal material (55) which is in a blue phase (56), —at least one of the first and second layers has, toward the bulk, an alignment layer (15, 25), and —the blue phase of the liquid crystal material exhibits a uniform organization in three directions (Ox, Oy, Oz) in at least 80% of the volume of the bulk, said liquid crystal material being stabilized in said blue phase at least over the temperatures ranging from 10° C. to 35° C.