Beschreibung:
<jats:title>Abstract</jats:title>
<jats:p>The enhancement of light absorption in an ultrathin two-dimensional material is critical for its optoelectronic and photonic applications. In this work, we investigated the enhanced light absorption of layered PtSe<jats:sub>2</jats:sub> by engineering the optical impedance and the attenuation of the PtSe<jats:sub>2</jats:sub>-based metal–insulator–metal (MIM) absorber. For a monolayer PtSe<jats:sub>2</jats:sub>-based MIM absorber, the undesirable impedance mismatch can be compensated for using the top patterned metal array in the MIM structure to achieve near-perfect absorption (99.95%), and the absorption of monolayer PtSe<jats:sub>2</jats:sub> is enhanced by 8.6 times in the visible spectra. For a few-layer PtSe<jats:sub>2</jats:sub> MIM absorber, the self-impedance of the PtSe<jats:sub>2</jats:sub> layer becomes an important factor in modulating the optical absorption and the PtSe<jats:sub>2</jats:sub>-based absorbers show excellent features with broadband absorption, insensitive to the incident angle and polarization. Our results improve the viability of the PtSe<jats:sub>2</jats:sub>-based optoelectronic and photonic devices and shed light on the design of absorbers with hybrid 2D materials.</jats:p>