Wiley Online Library : Advanced Optical Materials
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High Strain Engineering of a Suspended WSSe Monolayer Membrane by Indentation and Measured by Tip‐Enhanced Photoluminescence

Straintronics involves the manipulation and regulation of the electronic characteristics of 2D materials through the use of macro- and nano-scale strain engineering. In this study, an atomic force microscope (AFM) coupled with an optical system is used to perform indentation measurements and tip-enhanced photoluminescence (TEPL), allowing to extract...

Wed Apr 17, 2024 12:50
Thermo‐Optical Switches Based on Spin‐Crossover Molecules with Wideband Transparency

The study harnesses the refractive index switching and the low extinction coefficient of a molecular spin-crossover thin film by designing a tunable optical resonator, operating in the visible spectral domain. Switching thermally the molecules between their low-spin and high-spin electronic configurations enables high figures-of-merit to be achieved...

Tue Apr 16, 2024 10:47
Highly Efficient Pure‐Red Quasi‐2D Perovskite Light‐Emitting Diodes Enabled by Propylammonium Chloride Passivator

Efficient quasi-2D red PeLEDs at 625 nm are realized by employing volatile alkylammonium chlorides (propylammonium chloride) passivators. The interaction of PbI2 with propylamine (PA)…H+Cl- effectively passivates the defects, leading to reduced non-radiative recombination and improved carrier transfer. Consequently, the PACl-treated devices achieve...

Tue Apr 16, 2024 10:47
Influence of Hot Carrier Cooling and Band‐Filling Effect on Linewidth of Perovskite Microlasers

The band-filling effect is found to dominate the unfavorable shifts in lasing modes, and strong electron–phonon coupling leads to emission line broadening, as indicated from the spectral and temporal resolved emission behavior. The hot carrier cooling process buffers the change in the transient refractive index and relieved the lasing mode shifts....

Tue Apr 16, 2024 10:47
Resonant Fully Dielectric Metasurfaces for Ultrafast Terahertz Pulse Generation

Here, dielectric metasurfaces for pulsed terahertz (THz) generation are explored. The use of a fully dielectric semiconductor exploiting morphology-mediated resonances and inherent quadratic nonlinear response is proposed. This system exhibits a remarkable 40-fold efficiency enhancement compared to the unpatterned at the peak of the optimized wavelength...

Tue Apr 16, 2024 10:47
One‐Step Photo‐Patterning Process for Multi‐Modal and Transformative Structural Coloration: Toward Anti‐Counterfeiting Applications

A straightforward one-step fabrication technique is developed for creating a bilayer film composed of UV-curable chitosan with controlled thickness on the surface of an elastomer substrate that can be made to exhibit multicolored structural patterns under a single bending event by inducing micro/nanoscale wrinkles. The thickness-based color tunability...

Tue Apr 16, 2024 10:47

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