Laser patterning of large-scale perovskite single-crystal-based arrays for single-mode laser displays

Abstract

Highlights Femtosecond-laser allows for high-precision, chemically clean, and repeatable fabrication. Large perovskite single-crystal films improve the microcavity quality. Low-threshold, narrow-linewidth perovskite microlaser arrays are realized. Possibility of the single-mode microlasers for use as pixels is demonstrated.

Femtosecond laser ultrafast photothermal exsolution

“…Employing higher power lasers accompanied by further increasing scan speed to m•s −1 can make this technique more efficient and practical for industrial applications, rather than being limited in the lab-scale. From material perspective, black and darkblue ZrO 2 can also be potentially applied as solar absorbers [24,52], pigments and dyes [53], and in decoration, implant dentistry [54], photocatalyst [55] fields; while from technique perspective, the applications of our method is as well compatible with those of fs laser ablation/structuring, patterning, and material synthesis within the scope of optics/photonics [56][57][58][59][60][61], energy [62], photoelectronic [63], flexible electronics [64], wettability [65,66], biomimetic [67], bubble/gas manipulation [68], stimulus-responsive interfaces [69], miniaturized robotics [70], fundamental studies [71][72][73][74], etc.…”

Advanced Laser Nanofabrication Technologies for Perovskite Photonics

“…Typical absorption spectra of the Cs‐based lead halide perovskites on the right‐most panel divide the main diagram into two sections indicating the possibility of applications of the mentioned technologies within the absorption and transmission bands of the material. PT – phase transition, the numbers near each dot correspond to the following references: 1 ‐, [ 47 ] 2 ‐, [ 163 ] 8 ‐; [ 237 ] LAG – Laser‐assisted growth: F – wet film 3 ‐, [ 188 ] 6 ‐, [ 187 ] 7 ‐, [ 139 ] L – liquid 9 ‐, [ 192 ] 10 ‐, [ 238 ] P – polymer 11‐, [ 239 ] 12 ‐, [ 240 ] G – glass 25 ‐, [ 241 ] 28 ‐, [ 242 ] 29 ‐, [ 199 ] 30 ‐, [ 243 ] 31 ‐, [ 194 ] 32 ‐, [ 200 ] 33 ‐; [ 202 ] LD ‐ Laser‐induced change of dimensionality 4 ‐; [ 171 ] LP – Laser polishing 5 ‐, [ 244 ] 23 ‐, [ 245 ] 24 ‐; [ 246 ] LA – Laser ablation 13 ‐, [ 211 ] 14 ‐, [ 174 ] 15 ‐, [ 206 ] 16 ‐, [ 235 ] 17 ‐, [ 217 ] 18 ‐, [ 236 ] 19 ‐, [ 213 ] 20 ‐, [ 223 ] 21 ‐, [ 225 ] 22 ‐; [ 227 ] LIFT – laser‐induced forward transfer 13 ‐, [ 211 ] 26 ‐, [ 61 ] 27 ‐ [ 222 ] ).…”

“…Indeed, these aspects are closely connected to each other, for example, the synthesis of highly crystalline films with the minimized density of grain boundaries will expectedly reduce the unexpected surface scattering effects facilitating the light localization effects, fabrication resolution, and reproducibility. [ 174,223 ] In turn, the formation of the perovskite materials with a composition providing lower thermal conductivity (such as films composed of the NCs), higher absorption or faster thermalization rates will reduce the resulting heat‐affected zone and fabrication resolution. Obtaining novel perovskite materials with low sublimation temperatures is also beneficial for precise and clean laser patterning at minimized amount of the ejected molten‐phase debris.…”

Continuous-Wave Pumped Monolayer WS2 Lasing for Photonic Barcoding

“…Conversely, laser-based barcodes offer clear advantages with their narrow linewidth and brightness, making them reliable for identification. Researchers are exploring micro/nanolaser-based barcodes with different structures, like Whispering Gallery Mode (WGM) and Fabry-Perot [8][9][10][11][12][13]. However, these laser systems usually need expensive pulsed lasers for detection, obstructing their practicality.…”