Electromagnetically Induced Grating | Interference (wave propagation), Population inversion, Coherence (physics), Interference pattern, Diffraction grating, Photolithographic

Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Electromagnetically induced grating (EIG) is an optical interference phenomenon where an interference pattern is used to build a dynamic spatial diffraction grating in matter. EIGs are dynamically created by light interference on optically resonant materials and rely on population inversion and/or optical coherence properties of the material. They were first demonstrated with population gratings on atoms. EIGs can be used for purposes of atomic/molecular velocimetry, to probe the material optical properties such as coherence and population life-times, and switching and routing of light. Related but different effects are thermally induced gratings and photolithography gratings.