[14p-K301-1~18] 17.3 Layered materials

1:45 PM - 2:00 PM JST(4:45 AM - 5:00 AM UTC)Presentation by Applicant for JSAP Young Scientists Presentation Award

[14p-K301-2] Absorptivity enhancement of monolayer MoS₂ by light trapping strategy

〇Myeongok Kim¹, Dangrong Xie¹, Paul Jacquet², Antoine Faugere², Yusuke Oteki¹, Yoshitaka Okada¹ (1.RCAST, UTokyo, 2.Ecole Polytechnique)

Keywords:

MoS2,light trapping,metal nanoparticle

Monolayer transition metal dichalcogenides have high absorption coefficient, but increasing their thicknesses for high absorptivity cannot exploit their direct bandgap nature as they are indirect bandgap semiconductors in bulk. Light trapping strategies that allow strong absorptivity while maintaining direct bandgap nature of monolayers are necessary. Metal nanoparticles can be an option. They can increase absorptivity via various mechanisms, such as scattering, localized surface plasmon resonance, or hot carrier injection. In this research, the effect of metal nanoparticles on the absorptivity of monolayer MoS₂ is studied with COMSOL simulation. Different metal types, nanoparticle size, and coverage are explored. It is found that metal nanoparticles indeed increase absorptivity thanks to their localized surface plasmon resonance effect.