Gate slots over 2DES support plasmon resonances at L = λ/8 + nλ/2 due to a -π/4 reflection phase shift at the gate edge, with weak leakage and up to 50% dipole-limit absorption.
Although it fully accounts for evanescent field effects at a single boundary (encoded in arg r), it neglects the interactions of evanescent fields be- tween the two boundaries
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Unconventional quantization of 2D plasmons in cavities formed by gate slots
Gate slots over 2DES support plasmon resonances at L = λ/8 + nλ/2 due to a -π/4 reflection phase shift at the gate edge, with weak leakage and up to 50% dipole-limit absorption.