Fig. 13

MPL applications. a A plasmonic split-ring and disc array were fabricated to enhance the photocurrent of a Si photodiode: (a1) The SEM images of the plasmonic nanoantennas; (a2 ~ a4) Photocurrent comparisons between the photodiodes with the antennas and the ones without antennas in different collection wavelengths. Reprinted with permission from Optics Letters 2016, 41(19), 4445–4448. Copyright 2016 Optical Society of American. b Plasmonic metasurfaces served as SAs in the fiber laser cavities: (b1) Plasmonic metasurface SA were implemented into a free space-coupled fiber laser cavity; (b2) Nonlinear transmission spectrum of the gold nanorod metasurface; (b3) The gold nanorod metasurfaces were fabricated on the endface of a commercial single-mode fiber jumper. Reprinted with permission from Light: Science & Applications 2020, 9, 50 (b1,b2) and Light: Advanced Manufacturing 2022, 3, 45 (b3). Copyright 2020 Springer Nature Publishing Group and 2022 Jihua Laboratory. c Plasmon enhanced Schottky photodetectors: (c1) Schematic images of the 1D and 3D plasmonic Schottky photodetector; (c2) Experimental photocurrent responsivity and theoretical calculation of absorption at λ = 1500 nm for embedding depths of 5 nm (blue), 15 nm (green), and 25 nm (red). Reprinted with permission from Nano Letters 2013, 13, 1687 − 1692. Copyright 2013 American Chemical Society. d Two-photon images of cancer cells: (d1) Two-photon autofluorescence image of unlabeled cells; (d2) TPL image of nanorod-labeled cells. Reprinted with permission from Nano Letters 2007, 7, 941–945. Copyright 2007 American Chemical Society