Results 261 to 270 of about 1,666 (272)
Advanced Optical Materials, EarlyView.A new heavy‐atom‐free, donor–acceptor‐type organoboron luminophore has been synthesized, which exhibits red room‐temperature phosphorescence (RTP) in the crystalline state. Furthermore, the amorphous solid generated by grinding shows green thermally activated delayed fluorescence (TADF), displaying distinct mechanochromic luminescence (MCL) through ...
Yohei Adachi +7 more
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Advanced Optical Materials, EarlyView.Here, recent progress is highlighted in colloidal magnetoplasmonic hybrid nanomaterials, with a focus on chiral plasmonics. Metal nanocrystals with intrinsic chiroptical features can lead to a combination of chiral plasmonics and magneto‐optics effects when interacting with the magnetic counterpart, offering a foundation for systematically designing ...
Miguel Comesaña‐Hermo +4 more
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Recent Progress in Organic TADF Emitters Containing Heavy Atoms
Advanced Optical Materials, EarlyView.In this review, progress on heavy atom use in organic TADF emitters to produce internal and external heavy atom effects is summarized. Impacts on molecular geometry, TADF efficiency, and performance in OLEDs are discussed. An outlook on the challenges and opportunities of heavy atom incorporation is provided.
Seja A. Elgadi +2 more
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Spin‐Orbit Photonics with Potato Starch Lenses
Advanced Optical Materials, EarlyView.Native potato starch spherulites are introduced as volumetric optical elements that modulate both dynamic and geometric phases of light. These spherulites focus light and generate optical vortices via spin‐orbit interaction, functioning as polarization‐sensitive microlenses. Their unique radial anisotropy enables applications in vortex beam generation,
Petr Bouchal +4 more
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Advanced Optical Materials, EarlyView.A switchable and rotatable chiral nematic liquid crystal diffraction grating is demonstrated, driven by low voltages at room temperature. Incorporation of the dimer CB7CB induces an asymmetric tilt via the flexoelectro‐optic effect, generating torque that enables uniform 360° in‐plane rotation of both the grating and its far‐field diffraction pattern ...
Qihao Han +4 more
wiley +1 more source
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On Twistors in Cantorian space
Chaos, Solitons & Fractals, 2001Abstract This short note considers Penrose Twistor theory from the E (∞) Cantorian space-time view point. It is found that the expectation value of the Hausdorff dimension of E (∞) could be written in terms of Twistors, quantities as D= R ( c ) αβ αβ + R ( c )αβ αβ = 1 Z α Z α
M.S. El Naschie, M.S. El Naschie
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G-structures of twistor type and their twistor spaces
Journal of Geometry and Physics, 1993Abstract The notion of a group of twistor type is defined as a linear group G whose Lie algebra has an element J with J =–1. The twistor space Z of a G -structure with a connection on a manifold M is constructed where G is a Lie group of twistor type.
D.V. Alekseevsky, M.M. Graev
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Journal of Geometry and Physics, 1986
Abstract The paper describes the geometry of the bundle T (M, ω) of the compatible complex structures of the tangent spaces of an (almost) symplectic manifold (M, ω), from the viewpoint of general twistor spaces [3], [9], [1]. It is shown that M has an either complex or almost Kaehler twistor space iff it has a flat symplectic connection ...
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Abstract The paper describes the geometry of the bundle T (M, ω) of the compatible complex structures of the tangent spaces of an (almost) symplectic manifold (M, ω), from the viewpoint of general twistor spaces [3], [9], [1]. It is shown that M has an either complex or almost Kaehler twistor space iff it has a flat symplectic connection ...
openaire +2 more sources