Determining photonic band structure by energy-momentum spectroscopy in an electron microscope
Gatan instrument used
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Background
Novel optical devices formed from photonic crystals (PhCs) and metamaterials have attracted significant attention due to a plethora of potential applications, including optical computing, telecommunications, and (micro-LED) displays. PhCs and metamaterials take advantage of coherent scattering and near field interactions, which provide opportunities for researchers to control and manipulate light down to the nanoscale. PhCs can be designed with specific photonic band structures that selectively control the transmission or propagation of light at prescribed frequencies and directions defined by the PhC’s lattice form and periodicity. However, the optimization of devices requires precise control of the PhC components shape and size, nanoscale arrangement, and experimental techniques that can characterize both physical and optical properties.
