▎ 摘　　要

NOVELTY - A light emitter includes a substrate, and a quasi-one-dimensional graphene nanomaterial coupled to the substrate, where the quasi-one-dimensional graphene nanomaterial includes one or more topological defects. USE - Light emitter used for laser and switch for fabricating electronic device (all claimed). ADVANTAGE - The graphene in the form of one or more layers of quasi-one-dimensional graphene nanomaterials or graphene nanostripes including one or more topological defects. The optically active graphene can emit photoluminescence upon exposure to photoexcitation and can also generate laser emission. The optically active graphene can be patterned onto substrates according to the disclosed methods of fabricating electronic devices and is optionally useful for generating optical switches. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for: (1) method for generating photoluminescence, which involves: (a) illuminating the quasi-one-dimensional graphene nanomaterial of the light emitter with a light source; and (b) producing photoluminescence from one or more topological defects; (2) a laser, which includes a pump laser, and one or more layers of quasi-one-dimensional graphene nanomaterials disposed on a substrate and optically coupled to the pump laser, where the one or more layers of quasi-one-dimensional graphene nanomaterials include one or more topological defects; (3) a switch, which includes a pulsed light source, a beam splitter optically coupled to the pulsed light source and operable to provide a first optical path and a second optical path, where the first quasi-one-dimensional graphene structure of the light emitter is disposed along the first optical path, a delay stage and a second quasi-one-dimensional graphene structure disposed along the second optical path, where the second quasi-one-dimensional graphene structure includes one or more topological defects, a photodetector optically coupled to the first quasi-one-dimensional graphene structure and the second quasi-one-dimensional graphene structure, and a logic circuit coupled to the photodetector; and (4) method for fabricating an electronic device comprising the light emitter, which involves: (a) providing the substrate; (b) depositing a hardmask layer on the substrate; (c) depositing a photoresist layer on the hardmask layer; (d) patterning the photoresist layer to form a photoresist layout; (e) patterning the hardmask layer using the photoresist layout to form a patterned hardmask and exposed substrate regions; and (f) depositing the quasi-one-dimensional graphene structure on the exposed substrate regions. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view explaining optical configuration for illuminating graphene and collecting photoluminescence. 205Graphene sample 210Pump source 215Excitation light 220Excitation aperture 235Emitted light