Photonic crystals (PCs) are highly ordered materials that possess a periodically modulated dielectric constant, with the properties of confining and controlling the propagation of light owing to the existence of photonic band gap, a band of frequencies in which light propagation in the photonic crystal is forbidden (Freymann et al., 2013; Lee ...

Photonic crystals are optical media containing a periodic nanostructure – typically, a periodic variation of the refractive index, where the occurring periods are of the order of the optical wavelength.

A photonic crystal is a periodically repeating structure made up of different materials with varying dielectric constants. It is a concept that has been used in optics and photonics for a long time, with applications ranging from distributed feedback lasers to gratings.

2018年11月2日 · Photonic crystals are periodic optical nanostructures that can control light, specifically photons. Such crystals occur in nature in the form of structural coloration – like the...

Photonic crystals are periodically structured electromagnetic media, generally possessing photonic band gaps: ranges of frequency in which light cannot prop-agate through the structure.

A photonic crystal (PhC) is a periodic structure composed of materials with different refractive indices and lattice constants at the light wavelength scale. From: Nanocomposites for Photonic and Electronic Applications, 2020

Photonic crystals are materials patterned with a periodicity in dielectric constant, which can create a range of 'forbidden' frequencies called a photonic bandgap. Photons with energies lying...

Photonic Crystals exploit the interaction between light and structure to control photonic behavior, mimicking semiconductor principles for photons. These materials are essential in creating photonic band gaps, which prohibit certain light wavelengths from propagating, thereby controlling light with precision.

This chapter outlines the practical aspects of implementing photonic crystal structures, together with their associated properties for a range of applications, stressing both passive and active or tunable structures.

We review basic physics of photonic crystals, discuss the relevant fabrication techniques, and summarize important device development in the past two decades. First, photonic band structures of photonic crystals and the origin of the photonic band gap are analyzed.