Year: 2022

DEMONSTRATION OF TEMPORAL CLOAKING using changes in refractive index. "Recent research has uncovered a remarkable ability to manipulate and control electromagnetic fields to produce effects such as perfect imaging and spatial cloaking." https://lnkd.in/egaTnRz View in LinkedIn

HOLE IN SPACE. "To achieve spatial cloaking, the index of refraction is manipulated to flow light from a probe around an object in such a way that a ‘hole’ in space is created, and the object remains hidden." https://lnkd.in/egaTnRz View in LinkedIn

"IT'S NO ILLUSION: Science has found a way to make not just objects but entire events disappear..."The concepts are basically quite simple," said Paul Kinsler, a physicist at Imperial College London, who created the idea with colleagues Martin McCall and Alberto Favaro...this cloak would use special materials filled with metallic arrays designed to adjust the speed of light passing through." https://lnkd.in/eka5NuE View in LinkedIn

EM DISTORTION, THE START. "Invisibility cloaks are the result of physicists’ newfound ability to distort electromagnetic fields in extreme ways. The idea is steer light around a volume of space so that anything inside this region is essentially invisible." https://lnkd.in/eVgKzAT View in LinkedIn

PROGRESS IN CLOAKING. "The first invisibility cloaks worked only at microwave frequencies but in only a few years, physicists have found ways to create cloaks that work for visible light, for sound and for ocean waves. They’ve even designed illusion cloaks that can make one object look like another." https://lnkd.in/eVgKzAT View in LinkedIn

TIME CLOAKING CLOAKS EVENTS. "Physicists have created a “hole in time” using the temporal equivalent of an invisibility cloak...Today, Moti Fridman and buddies, at Cornell University in Ithaca, go a step further. These guys have designed and built a cloak that hides events in time." https://lnkd.in/eVgKzAT View in LinkedIn

TRANSFORMATION OPTICS. "No matter whether the cloaks are for cloaking objects or for cloaking events, they are mainly designed based upon the popular transformation optics method." https://lnkd.in/eJ7ATea View in LinkedIn

FROM INVISIBILITY TO TIME CLOAKS. "Similar to distant spatial cloaks, which can cloak objects at a distance outside the cloaks and be regarded as a conjugated spatial filter, we can also construct a temporal cloak without time window to conceal events." https://lnkd.in/eJ7ATea View in LinkedIn

TWO TIME CLOAK METHODS. "The cloaks can either be constructed by synthesizing two linear time-invariant filters with different transfer functions to open and close a temporal gap orderly, so that any events occurring during the gap are not detectable outside, or be designed based upon temporal compensation to make event outside the cloaks not detectable." https://lnkd.in/eJ7ATea View in LinkedIn

SPACE-TIME DUALITY. "Time cloaking is possible because of a kind of duality between space and time in electromagnetic theory. In particular, the diffraction of a beam of light in space is mathematically equivalent to the temporal propagation of light through a dispersive medium. In other words, diffraction and dispersion are symmetric in spacetime." https://lnkd.in/eVgKzAT View in LinkedIn