(Nanowerk News) Researchers at Tohoku University have addressed one of the key challenges of electromagnetic waves in the terahertz frequency range by developing a new type of tuneable filter for ...
Announcing a new publication from Opto-Electronic Advances; DOI 10.29026/oea.2026.250274. Tunable lasers are key light sources capable of precisely and rapidly adjusting their output wavelength while ...
Schematic concept of the developed tunable filter. (a) Cross-sectional view of the filter; (b) relationship between period and refractive index; (c) frequency shift due to the change of refractive ...
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