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IEEE/ICACT20260376 Question.2 Questioner: kanampiumw@wssu.edu 2026-02-17 오후 5:17:53	IEEE/ICACT20260376 Answer.2 Answer by Auhor 1732955442@qq.com 2026-02-17 오후 5:17:53
Are there any trade-offs in choosing such a air-hole defect size?	Yes, several important trade-offs exist: 1.Confinement vs. Loss: The 110 nm core enables strong subwavelength confinement via the slot-waveguide effect, but smaller cores increase scattering losses from surface roughness and inherent leakage losses. 2.Performance vs. Fabricability: This dimension optimizes field enhancement and polarization selectivity (ER = 43.393 dB), but demands nanoscale fabrication precision. Deviations of ±10 nm would significantly alter modal properties. 3.Extinction Ratio vs. Insertion Loss: The proximity to the metal film that enables high ER (43.393 dB) also contributes to baseline loss for the desired polarization (IL = 1.553 dB). 4.Wavelength Flexibility: Optimal confinement occurs within specific wavelength ranges; performance degrades outside the designed band. The 110 nm value represents an optimal balance—small enough to leverage subwavelength effects, yet large enough to maintain practical fabricability and acceptable loss.

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