Referring to or using opto-electronic, electro-optic, or magneto-optic phenomena. Note: Photonic devices include a wide variety of active devices that are used in countless applications in the fields of optical detection and imaging, optical communications systems, direct optical-to-electrical power generation, etc. For example, phtonic devices include, but are not limited to: light-emitting diodes (LEDs,) injection laser diodes (ILDs,) avalanche photodiodes (APDs,) liquid crystal displays (LCDs,) charge-coupled devices (CCDs,) cathode-ray tubes (CRTs,) Kerr cells, Pockels cells, photovoltaic cells, etc.