Jiajia Wang, Zhenhong Jia, Changwu Lv, Yanyu Li, "Application of metal nanoparticles/porous silicon diffraction grating in rhodamine 6 G fluorescence signal enhancement," Chin. Opt. Lett. 15, 110501 (2017)
- Chinese Optics Letters
- Vol. 15, Issue 11, 110501 (2017)
Fig. 1. (a) Top view of the PSi grating, (b) the cross section of the PSi grating; the partially enlarged surface morphology of (c) the ridge and (d) the groove.
Fig. 2. UV–Vis absorption spectra of (a) Ag NPs and (b) Au NPs.
Fig. 3. Schematic diagram of the preparation of a metal NP/PSi grating fluorescence enhanced device system.
Fig. 4. Reflection spectra of a rectangular groove silicon grating and a planar crystal silicon. The grating groove depth is 30 nm.
Fig. 5. PSi grating and planar PSi device (a) reflection spectra and (b) fluorescence spectra.
Fig. 6. (Color online) Fluorescence spectra of R6 G (100 nmol/L) on different substrates. The insert map presents the fluorescence intensity of R6 G (100 nmol/L) detected on rectangular groove silicon grating and smooth silicon.
Fig. 7. Fluorescence spectra of R6 G (100 nmol/L) on a metal NP/PSi grating device.
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