Fig. 1. Schematic diagram of the plasmonics bend waveguide filter based on microcavity coupling structure

Fig. 2. (a) Transmission spectrogram of filters with (solid line) and without (dotted line) microcavity structures; electric field intensity distribution of the filter (b) without and (c) with resonant cavity

Fig. 3. Transmission spectrogram of filter with different cavity lengths h under the conditions of d=12 nm, t=112 nm

Fig. 4. (a) Transmission spectrogram and (b)~(e) electric field intensity distribution of the filters with different t under the conditions of d=12 nm, h=390 nm

Fig. 5. (a) Schematic diagram of the primary filter with the right cavity structure; (b) transmission spectra of the filter with different combinations of h and h0; transmission spectrogram of the MIM waveguide with (c) h=320 nm, h0=370 nm, (d) h=360 nm, h0=410 nm, (e) h=400 nm, h0=450 nm, (f) h=440 nm, h0=490 nm, (g) h=480 nm, h0=530 nm, (h) h=520 nm, h0=570 nm, (i) h=550 nm, h0=600 nm; (j) resonant wavelengths curve of peaks with the linear increase of resontor length in the plasma induced transparenc

Fig. 6. Transmission spectrogram of the filter with different ▽h