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Abstract Theoretical comparative study has been done on the optical absorption of planar graphene superlattice with Thue-Morse and Fibonacci sequence formed by patterning graphene sheet on a heterosubstrate as Sio2… Click to show full abstract
Abstract Theoretical comparative study has been done on the optical absorption of planar graphene superlattice with Thue-Morse and Fibonacci sequence formed by patterning graphene sheet on a heterosubstrate as Sio2 and h-BN. A numerical method along with analytical approach is presented to obtain electronic structure and in particular, wavefunctions in these structures together with optical absorption. A tunable optical transitions between minibands is observed based on engineering structural parameters in both superlattice structures. Considerable optical absorption is obtained for Thue-Morse superlattice (TGSL) and Fibonacci superlattice (FGSL). Through detailed study a comparison between two structures is done to show their potential for photonics application.
Journal Title: Physica B: Condensed Matter
Year Published: 2019
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