Efficient graphene-based photodetector with two cavities

• Autor(es): Ferreira, Aires ; Peres, N. M. R. ; Ribeiro, R. M. ; Stauber, Tobias
• Data: 2012
• Identificador Persistente: http://hdl.handle.net/1822/21883
• Origem: RepositóriUM - Universidade do Minho
• Assunto(s): Graphene
• Tipo de Documento: Artigo
• Idioma: Inglês

Descrição

Documento submetido para revisão pelos pares a publicar em Physical Review B. We present an efficient graphene-based photodetector with two Fabri-P\'erot cavities. It is shown that the absorption can reach almost 100% around a given frequency, which is determined by the two-cavity lengths. It is also shown that hysteresis in the absorbance is possible, with the transmittance amplitude of the mirrors working as an external driving field. The role of non-linear contributions to the optical susceptibility of graphene is discussed.