Results 71 to 80 of about 2,028 (199)

Unraveling Size Dependent Bi‐ and Tri‐Exciton Characteristics in CdSe/CdS Core/Shell Quantum Dots via Ensemble Time Gated Heralded Spectroscopy

open access: yesSmall, Volume 22, Issue 1, 2 January 2026.
The size‐dependent biexciton binding energy in CdSe/CdS quantum dots is measured via ensemble time‐gated heralded spectroscopy, showcasing a transition between repulsive and attractive exciton‐exciton interactions. The spectrum and dynamics of two triexciton transitions are resolved and isolated from emission of multiexcitons of higher order.
Einav Scharf   +6 more
wiley   +1 more source

Bottom‐Up Synthesized B3N3‐Doped Amorphous Carbon Monolayer

open access: yesSmall Structures, Volume 7, Issue 1, January 2026.
B3N3‐doped amorphous carbon monolayers are synthesized through a UHV‐based strategy using surface‐assisted dehydrogenative intermolecular coupling of a functionalized borazine precursor, pyrene‐B3N3. After atomic‐scale characterization onthe growth substrate, the 2D material is transferred to Si/SiO2 and a TEM grid.
Birce Sena Tömekçe   +15 more
wiley   +1 more source

Effectively Identifying the Topological Charge and Polarization Order of Arbitrary Singular Light Beams Based on Orthogonal Polarization Separating

open access: yesIEEE Photonics Journal, 2019
Singular beams with spatially variant field distributions have various fantastic applications. However, one of the significant challenges that hinder the wide application of singular beams is how to effectively identify the topological charge and the ...
Yanliang He   +10 more
doaj   +1 more source

Efficient wide-angle broadband blazed gratings enabled by metasurfaces

open access: yesNanotechnology and Precision Engineering
Metasurfaces composed of two-dimensional nanopillar arrays can manipulate light fields in desirable ways and exhibit the unique advantage of beam steering. Here, we experimentally demonstrate a metasurface-based wide-angle broadband all-dielectric blazed
Chunshu Li   +4 more
doaj   +1 more source

An efficient compact blazed grating antenna for optical phased arrays

open access: yesJPhys Photonics
Phased arrays are vital in communication systems and have received significant interest in the field of optoelectronics and photonics, enabling a wide range of applications such as LiDAR, holography, and wireless communication. In this work, we present a
Henna Farheen   +4 more
doaj   +1 more source

Research on the Deflection Characteristics of Non-Mechanical Beams of Liquid Crystal Variable Retarder Cascade Polarization Gratings

open access: yesIEEE Photonics Journal
According to the research status of fast beam pointing and scanning in space laser communication, this paper proposes a beam deflection method that cascades liquid crystal tunable phase retarder with polarization grating, and realizes fast beam scanning ...
Qvan Han Wang   +5 more
doaj   +1 more source

Line Spread Functions of Blazed Off-Plane Gratings Operated in the\n Littrow Mounting [PDF]

open access: green, 2016
Casey T. DeRoo   +15 more
openalex   +2 more sources

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