English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Acousto-optical devices, such as modulators, filters or deflectors, implementa simple and effective way of light modulation and signal processingtechniques. However, their operation wavelengths are restricted to visible andnear-infrared frequency region due to a quadratic decrease of the efficiency ofacousto-optical interaction with the wavelength increase. At the same time,almost all materials with high value of acousto-optic figure of merit arenon-transparent at wavelengths larger than 5 {\mu}m, while the transparentmaterials possess significantly lower acousto-optic figure of merit. Here wepropose and demonstrate by calculations how these limitations could be overcomeusing specially designed planar semiconductor structures supportingelectromagnetic modes strongly coupled to the incident light in the Ottoconfiguration. Such approach could be used for a novel efficientacousto-optical device operating in middle infrared range of 8-14 {\mu}m.Acoustic wave excited by a piezoelectric transducer in a semi-conductor prismis utilized to modulate the coupling coefficient of the incident light to thesemiconductor structure which results in up to 100% modulation of thetransmitted light at the spatial scale less than the ultrasound wavelength. Itallows to utilize acoustic waves with short decay distance and therefore, itprovides a unique possibility to achieve an efficient acousto-opticalmodulation at frequencies over several gigahertz, which are unreachable fortraditional acousto-optics.

Efficient acousto-optical light modulation at the mid-infrared spectral range by planar semiconductor structures supporting guided modes