Light harvesting is crucial for thin‐film solar cells. To substantially reduce optical loss in
perovskite solar cells (PSCs), hierarchical light‐trap** nano‐architectures enable …

Optical metamaterials and metasurfaces enable versatile light manipulations.
Advancements in modeling, nanofabrication, and characterization tools have led to the …

Patterning of upconversion luminescent materials has been widely used for anti-counterfeit
and security applications, where the preferred method should be easy, fast, multicolor, high …

Passive plasmonic metasurfaces enable image multiplexing by displaying different images
when altering the conditions of observation. Under white light, three‐image multiplexing with …

Development of advanced fluorescent materials for constructing a secure and unclonable
encryption is urgently required; however, their application in anti-counterfeiting applications …

Up-conversion materials can be applied in anti-counterfeit fields because of their high
concealment and high up-conversion fluorescence efficiency. Herein, different lanthanide …

Advanced encryption and anti-counterfeiting methods are urgently needed to protect
valuable documents, merchandise and pharmaceuticals. In this research, dual-emissive …

Chiral metamaterials have attracted strong interest due to their versatile capabilities in spin-
dependent light manipulation. Benefiting from advancements in nanofabrication and …

Numerous new demands and obstacles have been posed to contemporary luminescent
materials and anti-counterfeiting systems by the ever-increasing importance of data security …

When a microlens array is aligned and overlaid on an array of patterns with similar
periodicity, a highly magnified image of the patterns is observed. This effect, known as moiré …