Optical materials and elements, considered as a physical system, comprise engineered media and components that manipulate electromagnetic radiation in the optical frequency range through controlled refraction, reflection, diffraction, absorption, and emission. This system includes bulk and nanostructured dielectrics, semiconductors, and metals configured as lenses, mirrors, prisms, gratings, filters, waveplates, and coatings, characterized by parameters such as complex refractive index, dispersion, nonlinear susceptibilities, and anisotropy. Their collective behavior determines wavefront shaping, spectral and polarization control, and spatiotemporal light propagation, underpinning the performance of optical assemblies in imaging, beam delivery, photonic integration, and laser systems.
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 an infinite phase velocity ...
Optics & Photonics
Feb 7, 2025
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30
A research group led by Prof. Yang Liangbao from the Hefei Institutes of Physical Science of the Chinese Academy of Sciences has enhanced localized surface plasmon resonance (LSPR) by studying Cu₂O₁₋ₓ superlattices ...
Nanophysics
Feb 6, 2025
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43
A research team at POSTECH has developed a novel multidimensional sampling theory to overcome the limitations of flat optics. Their study not only identifies the constraints of conventional sampling theories in metasurface ...
Optics & Photonics
Feb 4, 2025
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45
Cornell scientists have developed a novel technique to transform symmetrical semiconductor particles into intricately twisted, spiral structures—or "chiral" materials—producing films with extraordinary light-bending properties.
Nanophysics
Jan 30, 2025
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99
A research team from Skoltech and ITMO university has obtained tunable polariton emission at room temperature on CsPbBr3 perovskite crystals as a promising platform for integration into lateral microchips—a new concept ...
Optics & Photonics
Jan 30, 2025
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14
Researchers from Oakland University have made a significant breakthrough in the field of optical materials, unveiling the exceptional capabilities of Ba₃(ZnB₅O₁₀)PO₄ (BZBP). Although this transparent crystal closely ...
Condensed Matter
Jan 27, 2025
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7
A research team has discovered that achiral hard banana-shaped particles can spontaneously form exotic structures like skyrmions and blue phase III phases. Skyrmions are tiny vortex-like structures found in various condensed-matter ...
Condensed Matter
Jan 27, 2025
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93
Microscale light-emitting diodes (micro-LEDs) are emerging as a next-generation display technology for optical communications, augmented and virtual reality, and wearable devices. Metal-halide perovskites show great potential ...
Nanophysics
Jan 21, 2025
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76
University of Missouri scientists are unlocking the secrets of halide perovskites—a material that's poised to reshape our future by bringing us closer to a new age of energy-efficient optoelectronics.
Condensed Matter
Jan 21, 2025
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66
Researchers successfully developed a multifunctional sensor based on semiconductor fibers that emulates the five human senses. The technology developed in the study is expected to be utilized in a variety of state-of-the-art ...
Nanomaterials
Jan 21, 2025
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