Product piracy impacts wide areas of the global economy resulting in multi-billion dollar
losses per year. Therefore, product protection technologies are required to produce security …

Here, we investigate a method to distinguish the counterfeits by patterning multiple reflective
type grating directly on the surface of the original product and analyze the serial number …

Under white light illumination, gratings produce an angular distribution of wavelengths
dependent on the diffraction order and geometric parameters. However, previous studies of …

Chirped-pitch nanoscale circular surface-relief diffraction gratings were photoinscribed on
thin films of a Disperse Red 1 functionalized material using a holographic technique. A …

Encapsulation of grating structures facilitates an improvement of the optical functionality
and/or adds mechanical stability to the fragile structure. Here, we introduce novel …

The fight against forgery of valuable items demands efficient and reasonably priced
solutions. A security tag featuring holographic elements for anti-counterfeiting is one of them …

We propose a simple and flexible fabrication approach based on the moiré effect of
photoresist gratings for rapid synthesis of apodized structures with continuously varying …

The high-precision diffraction grating is an important chromatic dispersion component that
has been widely used in many fields, including laser beam combining, chirped pulse …

This paper presents a novel mirror-tunable laser interference system for the wafer-scale
patterning (> 4-in.) of submicron grating structures with a flexible periodicity (200–1000 nm) …

2.5 D photonic nanostructures with narrow‐band diffraction characteristics have a vast range
of potential applications in information storage, tunable lasers, optical filters, and biosensors …