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Optical reflectionless potentials for broadband, omnidirectional antireflection.

L V Thekkekara, Venu Gopal Achanta, S Dutta Gupta

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    Reflectionless potentials (RPs) enable total transmission, achieving broadband, omni-directional antireflection in optical systems. Experiments confirm this behavior using layered materials, showing less than 0.5% reflection across a wide spectrum.

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    Area of Science:

    • Optics and Photonics
    • Materials Science

    Background:

    • Reflectionless potentials (RPs) are theoretical constructs in quantum mechanics and optics.
    • RPs enable perfect transmission, eliminating reflection in one-dimensional scattering problems.
    • Optical realizations of RPs promise advanced antireflection functionalities.

    Purpose of the Study:

    • To experimentally demonstrate the reflectionless behavior of optical potentials.
    • To design and fabricate stratified dielectric media mimicking RPs.
    • To evaluate the antireflection performance of fabricated structures.

    Main Methods:

    • Design of stratified dielectric media using Al(2)O(3) and TiO(2) heterolayers.
    • Fabrication of the designed multi-layer structures.
    • Experimental measurement of reflection spectra for varying wavelengths and angles of incidence.

    Main Results:

    • Fabricated heterolayers exhibited reflectionless behavior.
    • Measured reflection was consistently below 0.5% across a broad wavelength range (350 nm to 2500 nm).
    • The antireflection performance was maintained for angles of incidence from 0 to 50 degrees.

    Conclusions:

    • Experimental validation of reflectionless potentials in optical systems.
    • Demonstration of broadband, omni-directional antireflection coatings.
    • Potential applications in optical instrumentation requiring high-performance anti-reflection solutions.