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Optical control of phase and group velocities in everyday liquids  
Cover Graphic showing ordinary liquid and ENZ liquid The phase and the group velocity of light propagating in conventional optical media cannot exceed the speed of light in vacuum. However, in so-called epsilon-near-zero (ENZ) materials, light exhibits…  
Kasra Amini awarded €2.5 million of funding from the European Research Council (ERC)  
Kasra Amini has been awarded the prestigious Starting Grant from the European Research Council (ERC). This highly competitive grant is given to exceptional early-career researchers with two to seven…  
New 'Chiral Vortex' of Light Reveals Molecular Mirror Images  
The entirely new structure of light could help drug developers see their work more clearly than before. An entirely new structure of light is helping to measure chirality in molecules more…  
Controlling magnetism with polarized light  
Intense laser pulses can be used to manipulate or even switch the magnetization orientation of a material on extremely short time scales. Typically, such effects are thermally induced, as the…  
Fundamental spatial limits of all-optical magnetization switching  
Magnetization can be switched with a single laser pulse. However, it is not known whether the underlying microscopic process is scalable to the nanometer length scale, a prerequisite for making this…  
Quantum state mixing in photobiology – new insight from ultrafast terahertz Stark spectroscopy  
The membrane protein bacteriorhodopsin is a proton pump, in which proton transport is initiated by the light-induced isomerization of the chromophore retinal.  The molecular quantum states…  
Scientists decipher the contribution of electrons to molecular chirality  
A new experimental approach provides the long-awaited tools to understand the role of electrons in the molecular chiral reactivity and offers a way to control physical and chemical properties that…  
Nathalie Picqué receives the 2024 William F. Meggers Award  
The Meggers Award of OPTICA (formerly the Optical Society) was established in 1970 to honour the memory of William F. Meggers, an American physicist specialising in spectroscopy. It is awarded…