Results 291 to 300 of about 32,153,670 (424)

Dynamic Excitonic Beam Switching with Atomically‐Thin Binary Blazed Gratings

open access: yesAdvanced Optical Materials, EarlyView.
Two mirrored and interleaved blazed gratings are patterned into a monolayer WS2, contacted with gold electrodes inside an electrochemical cell. Applying a gate voltage to one of the grating electrode suppresses the exciton in that grating, enabling selective beam switching between diffractive orders.
Ludovica Guarneri   +8 more
wiley   +1 more source

Large Bidirectional Refractive Index Change in Silicon‐rich Nitride via Visible Light Trimming

open access: yesAdvanced Optical Materials, Volume 13, Issue 14, May 16, 2025.
Continuous‐wave visible light trimming of PECVD silicon‐rich nitride micro‐ring resonators enables precise, large bidirectional refractive index tuning. Resonance shifts as fine as 10 pm are achieved with a cost‐effective setup, demonstrating large red shifts of 49.1 nm and blue shifts of 10.6 nm.
Dmitrii Belogolovskii   +8 more
wiley   +1 more source

Colossal Terahertz Emission with Ultrafast Tunability Based on Van der Waals Ferroelectric NbOI2

open access: yesAdvanced Optical Materials, EarlyView.
The widespread THz applications are hindered by the scarcity of efficient ultrafast THz sources with on‐demand fast modulation and easy on‐chip integration capability. Here the discovery of colossal THz emission is reported from a van der Waals (vdW) ferroelectric semiconductor NbOI2 and demonstrates the ultrafast coherent control of the THz emission ...
Sujan Subedi   +8 more
wiley   +1 more source

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