Results 231 to 240 of about 44,690 (331)

Multi‐Octave All‐Dielectric Directional Coupler Using Integrated Half‐Mirror for Ultrawideband Terahertz Systems

open access: yesLaser &Photonics Reviews, EarlyView.
Fully exploiting the broad untapped terahertz spectrum necessitates extending the bandwidth of practical guided‐wave systems. This work introduces a substrateless quasi‐optical integration platform to meet this need. Classical optical principles going back to the time of Michelson are adapted to a planar, micro‐machined, monolithic‐silicon platform ...
Daniel Headland   +4 more
wiley   +1 more source

Large Beam Size Grating Coupler in Silicon‐on‐Insulator Using Fully Etched Subwavelength Gratings

open access: yesLaser &Photonics Reviews, EarlyView.
A fully etched, double‐period subwavelength structure is used to design a silicon‐on‐insulator grating coupler for large, well‐collimated off‐chip beams. The work experimentally demonstrates the generation of a 350‐micron wide beam, with a 54% radiation efficiency, thereby enabling efficient interaction with targets centimeters away from the chip ...
Miguel Barona‐Ruiz   +7 more
wiley   +1 more source

Discrete Chiral Ballistic Polariton Laser

open access: yesLaser &Photonics Reviews, EarlyView.
Planar microcavities in the strong light–matter coupling regime exhibit exciton‐polariton modes with a strong chiral response toward circularly polarized light. This feature is exploited alongside inherent spin‐orbit coupling of cavity light to generate giant discrete optical vortices in polygonal arrays of exciton‐polariton condensates.
Zuzanna Werner   +5 more
wiley   +1 more source

Photonic‐Defect Cavities as Next‐Generation Room‐Temperature Microlasers: A Comparative Study with Micropillars

open access: yesLaser &Photonics Reviews, EarlyView.
A hybrid semiconductor–dielectric microcavity is demonstrated with embedded InGaAs quantum dots, enabling stable continuous‐wave lasing at room‐temperature. Outperforming thermally limited micropillars, the quasi‐planar design supports elevated‐temperature operation, validated through advanced quantum optical characterization, and offers a scalable ...
Kartik Gaur   +7 more
wiley   +1 more source

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