Moti Fridman's time lens creates gaps in light beams, hiding anything in the gap in an invisibility cloak.
Researchers at Cornell University have built the first temporal cloak, a device that obscures an object or event not at a particular point in space but at a specific moment in time.
The approach is based on accelerating the front part of a probe light beam and slowing down its rear part to create a well controlled temporal gap such that the probe beam is not modified in any way by any event which occurs inside the gap.
The team demonstrated temporal cloaking in an optical fibre-based system by applying concepts from the space–time duality between diffraction and dispersive broadening.
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