A corrugated gold substrate enables continuous local tuning of hyperbolic phonon polariton wavelength in hBN by up to threefold and geometry-driven lateral nanofocusing by a factor of 2.5.
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Local control and lateral nanofocusing of hyperbolic phonon polaritons
A corrugated gold substrate enables continuous local tuning of hyperbolic phonon polariton wavelength in hBN by up to threefold and geometry-driven lateral nanofocusing by a factor of 2.5.