Electric-field-diversified optical properties of bilayer silicene

Po Hsin Shih, Thi Nga Do, Godfrey Gumbs, Hai Duong Pham, Ming Fa Lin

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

The rich optical properties of AA-bottom-top (bt) bilayer silicene (BS) in a uniform perpendicular electric field (E) are investigated through the use of the tight-binding model. The distinctive multivalley band structure presents a semimetallic behavior but with a sizeable intraband gap. The main features of the energy dispersion appear in the optical absorption spectrum through transitions between band-edge states obeying specific selection rules. The E field clearly modifies the energy dispersion, especially opening a band gap, leading to a substantial influence on the optical properties. This field creates additional excitation channels and increases the frequency and intensity of the spectral structures. The inclusion of electron-hole interaction gives rise to a slight difference in the spectral intensity and strongly affects the fluctuation in the threshold intensity as the field strength is varied. The interplay between the special lattice structure, atomic interactions, electron-hole interaction, and a E field robustly diversifies the absorption spectra.

Original languageEnglish
Pages (from-to)4721-4724
Number of pages4
JournalOptics Letters
Volume44
Issue number19
DOIs
Publication statusPublished - 2019 Oct 1

Fingerprint

optical properties
electric fields
absorption spectra
atomic interactions
optical spectrum
field strength
optical absorption
interactions
inclusions
thresholds
energy
excitation

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics

Cite this

Shih, Po Hsin ; Do, Thi Nga ; Gumbs, Godfrey ; Pham, Hai Duong ; Lin, Ming Fa. / Electric-field-diversified optical properties of bilayer silicene. In: Optics Letters. 2019 ; Vol. 44, No. 19. pp. 4721-4724.
@article{5e0fab8b23bf41e7b73ec1c0f6e8e038,
title = "Electric-field-diversified optical properties of bilayer silicene",
abstract = "The rich optical properties of AA-bottom-top (bt) bilayer silicene (BS) in a uniform perpendicular electric field (E) are investigated through the use of the tight-binding model. The distinctive multivalley band structure presents a semimetallic behavior but with a sizeable intraband gap. The main features of the energy dispersion appear in the optical absorption spectrum through transitions between band-edge states obeying specific selection rules. The E field clearly modifies the energy dispersion, especially opening a band gap, leading to a substantial influence on the optical properties. This field creates additional excitation channels and increases the frequency and intensity of the spectral structures. The inclusion of electron-hole interaction gives rise to a slight difference in the spectral intensity and strongly affects the fluctuation in the threshold intensity as the field strength is varied. The interplay between the special lattice structure, atomic interactions, electron-hole interaction, and a E field robustly diversifies the absorption spectra.",
author = "Shih, {Po Hsin} and Do, {Thi Nga} and Godfrey Gumbs and Pham, {Hai Duong} and Lin, {Ming Fa}",
year = "2019",
month = "10",
day = "1",
doi = "10.1364/OL.44.004721",
language = "English",
volume = "44",
pages = "4721--4724",
journal = "Optics Letters",
issn = "0146-9592",
publisher = "The Optical Society",
number = "19",

}

Electric-field-diversified optical properties of bilayer silicene. / Shih, Po Hsin; Do, Thi Nga; Gumbs, Godfrey; Pham, Hai Duong; Lin, Ming Fa.

In: Optics Letters, Vol. 44, No. 19, 01.10.2019, p. 4721-4724.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Electric-field-diversified optical properties of bilayer silicene

AU - Shih, Po Hsin

AU - Do, Thi Nga

AU - Gumbs, Godfrey

AU - Pham, Hai Duong

AU - Lin, Ming Fa

PY - 2019/10/1

Y1 - 2019/10/1

N2 - The rich optical properties of AA-bottom-top (bt) bilayer silicene (BS) in a uniform perpendicular electric field (E) are investigated through the use of the tight-binding model. The distinctive multivalley band structure presents a semimetallic behavior but with a sizeable intraband gap. The main features of the energy dispersion appear in the optical absorption spectrum through transitions between band-edge states obeying specific selection rules. The E field clearly modifies the energy dispersion, especially opening a band gap, leading to a substantial influence on the optical properties. This field creates additional excitation channels and increases the frequency and intensity of the spectral structures. The inclusion of electron-hole interaction gives rise to a slight difference in the spectral intensity and strongly affects the fluctuation in the threshold intensity as the field strength is varied. The interplay between the special lattice structure, atomic interactions, electron-hole interaction, and a E field robustly diversifies the absorption spectra.

AB - The rich optical properties of AA-bottom-top (bt) bilayer silicene (BS) in a uniform perpendicular electric field (E) are investigated through the use of the tight-binding model. The distinctive multivalley band structure presents a semimetallic behavior but with a sizeable intraband gap. The main features of the energy dispersion appear in the optical absorption spectrum through transitions between band-edge states obeying specific selection rules. The E field clearly modifies the energy dispersion, especially opening a band gap, leading to a substantial influence on the optical properties. This field creates additional excitation channels and increases the frequency and intensity of the spectral structures. The inclusion of electron-hole interaction gives rise to a slight difference in the spectral intensity and strongly affects the fluctuation in the threshold intensity as the field strength is varied. The interplay between the special lattice structure, atomic interactions, electron-hole interaction, and a E field robustly diversifies the absorption spectra.

UR - http://www.scopus.com/inward/record.url?scp=85072781714&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85072781714&partnerID=8YFLogxK

U2 - 10.1364/OL.44.004721

DO - 10.1364/OL.44.004721

M3 - Article

C2 - 31568426

AN - SCOPUS:85072781714

VL - 44

SP - 4721

EP - 4724

JO - Optics Letters

JF - Optics Letters

SN - 0146-9592

IS - 19

ER -