A lens made of a medium exhibiting negative refraction is disclosed. Also, an optical element made of a medium exhibiting negative refraction is disclosed. The lens or optical element may be incorporated in an optical system or an optical apparatus.

 
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< Siloxane prepolymer containing pendant and end-capping cationic and polymerizable groups

> Control of polymer surface molecular architecture via amphipathic endgroups

> Method and system to create and acoustically manipulate a microbubble
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