Angular Momentum Holography – Information Multiplexing

In a recent study, researchers created a novel technique for using angular momentum (AM) holography for information multiplexing.

Low resolution and a narrow field of view are drawbacks of holography based on standard optical components like spatial light modulators (SLM), which limit its practical uses. However, by substituting metasurfaces for the traditional parts, scientists can reach the counterpart with high resolution, ultra-thin thickness, and high performance.

Lights can be manipulated with various degrees of freedom (DoFs) using metasurfaces and two-dimensional subwavelength nanoscale scatter arrangements. A new breed of adaptable platforms for optical multiplexing holography is provided by it.

Various physical characteristics of light, including wavelength, incidence angle, state of polarization (SoP), and time, have been used in this context to create independent information channels for holographic devices. The AM dimension of light has surfaced as a new possibility for multiplexing holography after the currently available physical dimensions have been nearly exhausted.

Numerous applications in conventional and quantum optical fields, such as optical tweezers, the spin-Hall effect, and quantum microscopy, have been made possible by the optical AM, a quantum mechanical description of the photon. The AM is categorized as orbital angular momentum (OAM) and spin angular momentum (SAM).

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