User:Lamals/sandbox/Fluorescence microscopy via coherent control
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The field of fluorescence microscopy has seen many advances in the ability to create high resolution images in a non invasive manner that are important to various fields such as biology. Historically in light based microscopes, the limit on resolution of a point source fluorophore is the diffraction limit.[1] The desire of investigating samples that are smaller then the diffraction limit, e.g. on a nanometer scale, have lead to techniques that can overcome the diffraction limit. In the past few decades some of the most researched techniques are based on the general concept of reversible saturable optical fluorescence transition (RESOLFT).[2] These types of techniques do not generally exploit coherent quantum optical control. However, there has been intense activity in the spatial localization of atomic population in Λ-type systems coherently interacting with two electromagnetic fields.[3][4] These types of methods are generally based on coherent population trapping (CPT), and have been shown to be useful for microscopy.[5][6] Another technique based off of stimulated Raman adiabatic passage (STIRAP) is used to increase the resolution of fluorescence imaging to nanometer resolutions.[7]
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