Conformal CVD-Grown MoS₂ on Three-Dimensional Woodpile Photonic Crystals for Photonic Bandgap Engineering

Abstract

To achieve the modification of photonic band structures and realize the dispersion control toward functional photonic devices, composites of photonic crystal templates with high-refractive-index material are fabricated. A two-step process is used: 3D polymeric woodpile templates are fabricated by a direct laser writing method followed by chemical vapor deposition of MoS2. We observed red-shifts of partial bandgaps at the near-infrared region when the thickness of deposited MoS2 films increases. A ∼10 nm red-shift of fundamental and high-order bandgap is measured after each 1 nm MoS2 thin film deposition and confirmed by simulations and optical measurements using an angle-resolved Fourier imaging spectroscopy system.

Quantifying photoluminescence variability in monolayer molybdenum disulfide films grown by chemical vapour deposition

“…The widespread application of monolayer MoS 2 demands the scalable growth of highquality, continuous single-layer films. As such, chemical vapour deposition (CVD) methods have enabled the synthesis of large-area monolayer MoS 2 [17][18][19][20][21][22] and MoS 2 nanotube heterostructures [23].…”