Results 171 to 180 of about 55,918 (314)

Optical Self‐Tuning of Ferroelectric Metasurfaces Infiltrated with Nematic Liquid Crystals via Photovoltaic Effect

open access: yesAdvanced Optical Materials, EarlyView.
A novel scheme is introduced to achieve optical self‐tuning in ferroelectric lithium niobate (LN) metasurfaces equipped with a thin film of liquid crystals (LCs). The resonant optical field distributions inside the meta‐atoms can induce a photovoltaic (PV) field, which reorients the surrounding LCs.
Atefeh Habibpourmoghadam   +2 more
wiley   +1 more source

Graphene as Infrared and Electron Transparent Electrode Applied to the Design of Narrow Bandgap Nanocrystal‐Based Photodiode

open access: yesAdvanced Optical Materials, EarlyView.
The article explores the need for transparent conductive electrode in the context of nanocrystal based infrared photodetectors beyond traditional transparent conductive oxide and metallic grids. Use of such sensor for imaging where the diode is deposited on a read‐out integrated circuit raised the need for top transparent electrode.
Dario Mastrippolito   +17 more
wiley   +1 more source

Tunable‐Wavelength Broadband Liquid‐State Carbon‐Quantum‐Dot Lasers

open access: yesAdvanced Optical Materials, EarlyView.
This work provides a gain‐induced waveguide structure to achieve programmable mode spacing by coupling liquid‐state lasing of carbon quantum dots to a vertically placed aluminum mirror, enabling an unprecedented transition from random lasing to multimode lasing without cumbersome micromanufacturing, even single‐mode lasing at a wide range from 641 to ...
Xuezhe Dong   +9 more
wiley   +1 more source

Mitigating Losses in Hyperbolic Asymptotic Eigenmodes

open access: yesAdvanced Photonics Research, EarlyView.
Herein, hyperbolic asymptotic eigenmodes, high‐k modes aligned with asymptotic directions in hyperbolic metamaterials, are introduced. By tuning permittivity tensors to balance loss compensation (Re(ε∥)/Re(ε⊥)=Im(ε∥)/Im(ε⊥))$\left(\right. \text{Re} \left(\right. \left(\epsilon\right)_{\parallel} \left.\right) / \text{Re} \left(\right.
Lu Song   +5 more
wiley   +1 more source

Feasibility study of micromachining of silicon wafer with excimer laser using COMSOL multiphysics

open access: bronze, 2016
Gaganpreet Singh   +3 more
openalex   +1 more source

Improvement of Cu Ablation Efficiency Using GHz‐Burst Femtosecond Laser at 515 nm Wavelength

open access: yesAdvanced Photonics Research, EarlyView.
The green‐wavelength gigahertz (GHz)‐burst mode significantly improves the Cu ablation efficiency due to the interaction of subsequent intra‐pulses in a GHz‐burst with molten Cu. The superiority of the green‐wavelength GHz‐burst mode over the infrared‐wavelength one for a higher performance of Cu ablation at a smaller number of intra‐pulses is ...
Ashkan Momeni   +3 more
wiley   +1 more source

Home - About - Disclaimer - Privacy