Optical properties of monolayer bismuthene in electric fields

Rong Bin Chen, Der Jun Jang, Ming Chieh Lin, Ming Fa Lin

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)


Optical excitations of monolayer bismuthene present very rich and unique absorption spectra. The optical energy gap corresponding to the threshold frequency is not equal to an indirect energy gap, and it becomes zero under the critical electric field. The frequency, number, intensity, and form of the absorption structures are dramatically changed when an external electric field is applied. The prominent peaks and the observable shoulders, respectively, arise from the constant-energy loop and the band-edge states of parabolic dispersions. These directly reflect the unusual electronic properties, being very different from those in monolayer graphene. The novel optical properties of bismuthine that are easily manipulated by electric fields may find a lot of various applications in optoelectronics, either combined with or complementary to those graphene-based systems.

Original languageEnglish
Pages (from-to)6089-6092
Number of pages4
JournalOptics Letters
Issue number24
Publication statusPublished - 2018 Dec 15

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics

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