Exact(5)
For a grounded substrate with a quarter wavelength thickness, however, the input impedance is inductive at lower frequencies and capacitive at higher frequencies.
Long wavelength thickness perturbations occur during film growth to reduce the strain energy density in the passive film arising from intrinsic and electric field-induced stresses.
Both the results from phase analysis method and CST simulations reveal that the resonant frequency of the as-proposed filter appears at 2.78 THz, responding to a cavity with λ/18 wavelength thickness.
The minimum RL obviously shifts to lower frequency range with increased thickness, which can be understood according to the geometrical effect matching condition in which the thickness of the layer is a quarter wavelength thickness of the material.
In multilayered reflector systems with 1/4 wavelength thickness in each reflecting layer, a reflectivity as high as that of a silver mirror (96.6%) can be achieved with as few as seven layers, if the refractive indices are well chosen [12].
Similar(55)
Absorbtion of light in a planar absorber of sub-wavelength thickness is limited to 50%, if it is illuminated from only one side35.
We experimentally present an acoustic metasurface (AMS) with sub-wavelength thickness based on the meta-molecule consisting of eight different sized double-split hollow spheres (DSHSs).
For a given incident angle or grating filling factor, the required grating filling factor or incident angle can be expressed by the analytical forms of the quadratic equations at quarter-wavelength thickness.
Lee et al. fabricated a reflection GOM within sub-wavelength thickness [37].
Presently, the standard antireflection coatings in thin-film solar cells are the transparent thin films with quarter-wavelength thickness.
Meta-atoms with spatially varying geometry work as resonators, giving rise to phase discontinuity through the sub-wavelength thickness [133, 134].
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