Exploring shortwave infrared surface plasmons in 2D Ti<sub>3</sub>C<sub>2</sub>T<sub>x</sub> MXenes
발표자
()
초록
내용
In this talk, we will discuss an important discovery concerning the optical properties of 2D MXenes. Specifically, we found that 2D Ti3C2Tx exhibits a powerful plasmon phenomenon in the short-wave infrared range (wavelength = 1.5 – 6.0 μm) through acoustic plasmon modes. Remarkably, this results in a two-orders-of-magnitude reduction in wavelength compared to that of free space. Additionally, we have leveraged this remarkable finding to achieve a record-breaking nonlinear absorption coefficient of 1.37 × 10-2 m/W at a wavelength of 1.56 μm. This exceptional performance is attributed to the high plasma frequency of MXene, derived from its elevated electron density, and its substantial optical nonlinearity, which arises from its 2D morphology and the presence of air gaps separating the 2D sheets.