Ansys Learning Forum › Forums › Discuss Simulation › Photonics › Strange transmitance of AlN straight waveguide on sapphire substrate › Reply To: Strange transmitance of AlN straight waveguide on sapphire substrate
July 25, 2024 at 5:01 pm
Guilin Sun
Ansys Employee
It might be already cutoff. Please try to use FDE to find where it begins to not support the confined mode. Maybe it is too thin to support mode at longger wavelength.
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