photonic stop band centered at 500 nm was observed from the reflection spectrum
(Fig. 9.15). As such, the slow photon effect occurring at the edges of the stop band is
expected to appear in the range of 550–620 nm, which matches well with the surface
plasmon resonance (SPR) absorption of Au nanoparticles. The wavelength matching
of SPR absorption and photonic band edge would be expected to increase the SPR
Fig. 9.13 Photocurrent potential curves of different WO 3 photoanodes measured under (a) UV–
visible light irradiation (λ > 300 nm) and (b) visible light irradiation (λ > 400 nm) (Reprinted with
the permission from ref. [17]. Copyright 2011 American Chemical Society)
Scheme 9.3 Scheme of slow light effect (physical enhancement) and vacuum activation (chemical
enhancement) (Reprinted from ref. [18], Copyright 2014, with permission from Elsevier)
9.4 Multiple Light Scattering
237
(Fig. 9.15). As such, the slow photon effect occurring at the edges of the stop band is
expected to appear in the range of 550–620 nm, which matches well with the surface
plasmon resonance (SPR) absorption of Au nanoparticles. The wavelength matching
of SPR absorption and photonic band edge would be expected to increase the SPR
Fig. 9.13 Photocurrent potential curves of different WO 3 photoanodes measured under (a) UV–
visible light irradiation (λ > 300 nm) and (b) visible light irradiation (λ > 400 nm) (Reprinted with
the permission from ref. [17]. Copyright 2011 American Chemical Society)
Scheme 9.3 Scheme of slow light effect (physical enhancement) and vacuum activation (chemical
enhancement) (Reprinted from ref. [18], Copyright 2014, with permission from Elsevier)
9.4 Multiple Light Scattering
237