▎ 摘　　要

NOVELTY - The device (100) has a two-dimensional crystal (103) that includes a gain medium and having a first photonic crystal resonator (101) and a second photonic crystal resonator (102) spaced apart from each other. A graphene layer is arranged to cover a portion of the first photonic crystal resonator and not to cover the second photonic crystal resonator. The control electrode is locally arranged on the graphene layer. The control electrode electrically controls light absorption characteristics of the graphene layer by applying a voltage to the graphene layer. USE - Photonic crystal device. ADVANTAGE - The photonic crystal device can provide stable manufacturing and driving of a nanolaser which is capable of controlling an exceptional point. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of photonic crystal device. Photonic crystal device (100) First photonic crystal resonator (101) Second photonic crystal resonator (102) Two-dimensional crystal (103) Auxiliary substrate (110)