Light Emission Control by Photonic Bandgap

X-ray spontaneous emission control by 1-dimensional photonic bandgap structure

The possibility of controlling the x-ray spontaneous emission of atoms embedded in a 1dimensional photonic bandgap structure by the so-called Purcell effect, is studied. Calculations of the spontaneously emitted power are presented from Fermi’s golden rule in the framework of the Wigner-time approach extended to absorbing media. Numerical simulations are compared to experimental results for the...

Photonic crystals boost light emission

Control of two-dimensional excitonic light emission via photonic crystal

Monolayers of transition metal dichalcogenides (TMDCs) have emerged as new optoelectronic materials in the two dimensional (2D) limit, exhibiting rich spinvalley interplays, tunable excitonic effects, and strong light–matter interactions. An essential yet undeveloped ingredient for many photonic applications is the manipulation of its light emission. Here we demonstrate the control of excitonic...

Three-dimensional photonic bandgap materials: semiconductors for light*

Photonics, the technology of photons (by analogy to electronics, the technology of electrons) will be the driving force for the advancement of areas such as communications and computing, information technology and probably others such as sensing. Photonic band gap (PBG) materials may answer many of their demands. Trying to understand the physics involved is a challenge very eagerly taken on by ...

Enhancement of Light Emission from Silicon by Utilizing Photonic Nanostructures

Efficient silicon-based light sources are expected to be key devices for applications such as optical interconnection. Huge number of researches has been conducted for realizing silicon-based light sources. Most of them utilized silicon-related materials such as silicon nanostructures or germanium, not crystalline silicon, which has been considered as a poor light emitter because of its indirec...