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Graphene-tuned EIT-like effect in photonic multilayers for actively controlled light absorption of topological insulators

Journal Article


Abstract


  • © 2020 Optical Society of America under the terms of the OSA Open Access Publishing Agreement As newly emerging nanomaterials, topological insulators with unique conducting surface states that are protected by time-reversal symmetry present excellent prospects in electronics and photonics. The active control of light absorption in topological insulators are essential for the achievement of novel optoelectronic devices. Herein, we investigate the controllable light absorption of topological insulators in Tamm plasmon multilayer systems composed of a Bi1.5Sb0.5Te1.8Se1.2 (BSTS) film and a dielectric Bragg mirror with a graphene-involved defect layer. The results show that an ultranarrow electromagnetically induced transparency (EIT)-like window can be generated in the broad absorption spectrum. Based on the EIT-like effect, the Tamm plasmon enhanced light absorption of topological insulators can be dynamically tuned by adjusting the gate voltage on graphene in the defect layer. These results will pave a new avenue for the realization of topological insulator-based active optoelectronic functionalities, for instance light modulation and switching.

UOW Authors


  •   Lu, Hua (external author)
  •   Li, Yangwu (external author)
  •   Yue, Zengji
  •   Mao, Dong (external author)
  •   Zhao, Jianlin (external author)

Publication Date


  • 2020

Citation


  • Lu, H., Li, Y., Yue, Z., Mao, D. & Zhao, J. (2020). Graphene-tuned EIT-like effect in photonic multilayers for actively controlled light absorption of topological insulators. Optics Express, 28 (21), 31893-31903.

Scopus Eid


  • 2-s2.0-85093969381

Number Of Pages


  • 10

Start Page


  • 31893

End Page


  • 31903

Volume


  • 28

Issue


  • 21

Place Of Publication


  • United States

Abstract


  • © 2020 Optical Society of America under the terms of the OSA Open Access Publishing Agreement As newly emerging nanomaterials, topological insulators with unique conducting surface states that are protected by time-reversal symmetry present excellent prospects in electronics and photonics. The active control of light absorption in topological insulators are essential for the achievement of novel optoelectronic devices. Herein, we investigate the controllable light absorption of topological insulators in Tamm plasmon multilayer systems composed of a Bi1.5Sb0.5Te1.8Se1.2 (BSTS) film and a dielectric Bragg mirror with a graphene-involved defect layer. The results show that an ultranarrow electromagnetically induced transparency (EIT)-like window can be generated in the broad absorption spectrum. Based on the EIT-like effect, the Tamm plasmon enhanced light absorption of topological insulators can be dynamically tuned by adjusting the gate voltage on graphene in the defect layer. These results will pave a new avenue for the realization of topological insulator-based active optoelectronic functionalities, for instance light modulation and switching.

UOW Authors


  •   Lu, Hua (external author)
  •   Li, Yangwu (external author)
  •   Yue, Zengji
  •   Mao, Dong (external author)
  •   Zhao, Jianlin (external author)

Publication Date


  • 2020

Citation


  • Lu, H., Li, Y., Yue, Z., Mao, D. & Zhao, J. (2020). Graphene-tuned EIT-like effect in photonic multilayers for actively controlled light absorption of topological insulators. Optics Express, 28 (21), 31893-31903.

Scopus Eid


  • 2-s2.0-85093969381

Number Of Pages


  • 10

Start Page


  • 31893

End Page


  • 31903

Volume


  • 28

Issue


  • 21

Place Of Publication


  • United States