Review of improved spectral response of ultraviolet photodetectors by surface plasmon<xref rid="cpb_27_12_126101_fn1" ref-type="fn">*</xref><fn id="cpb_27_12_126101_fn1"><label>*</label> <p>Project supported by the National Key Research and Development Program of China (Grant No. 2016YFB0400904), the National Natural Science Foundation for Distinguished Young Scholars, China (Grant No. 61725403), the National Natural Science Foundation of China (Grant Nos. 61574142, 61322406, 61704171, and 11705206), the Key Program of International Partnership Program of the Chinese Academy of Sciences (Grant No. 181722KYSB20160015), the Special Project for Inter-government Collaboration of State Key Research and Development Program, China (Grant No. 2016YFE0118400), the Science and Technology Service Network Initiative of the Chinese Academy of Sciences, the Jilin Provincial Science & Technology Department, China (Grant No. 20180201026GX), the Interdisciplinary Innovation Team of the Chinese Academy of Sciences, and the Youth Innovation Promotion Association of the Chinese Academy of Sciences (Grant No. 2015171).</p></fn>

Review of improved spectral response of ultraviolet photodetectors by surface plasmon**

Project supported by the National Key Research and Development Program of China (Grant No. 2016YFB0400904), the National Natural Science Foundation for Distinguished Young Scholars, China (Grant No. 61725403), the National Natural Science Foundation of China (Grant Nos. 61574142, 61322406, 61704171, and 11705206), the Key Program of International Partnership Program of the Chinese Academy of Sciences (Grant No. 181722KYSB20160015), the Special Project for Inter-government Collaboration of State Key Research and Development Program, China (Grant No. 2016YFE0118400), the Science and Technology Service Network Initiative of the Chinese Academy of Sciences, the Jilin Provincial Science & Technology Department, China (Grant No. 20180201026GX), the Interdisciplinary Innovation Team of the Chinese Academy of Sciences, and the Youth Innovation Promotion Association of the Chinese Academy of Sciences (Grant No. 2015171).

Wu You^{1, 2}, Sun Xiao-Juan^{1, †}, Jia Yu-Ping¹, Li Da-Bing^{1, ‡}

(color online) (a) When an external light wave is incident on an Ag nanosphere, its electric field E₀ periodically displaces the nanosphere’s electrons with respect to the lattice. The result is an oscillating electron density — LSP, reproduced from Ref. [9] with the permission from the American Institute of Physics. (b) SEM images of dark-field images with different shapes of metallic nanoparticles and their plasmonic color.^[37] (c) SEM images, experimental and theoretical dark-field spectra of individual nanodisks with D = 70, 80, 100, 120, 130, 150, 180 nm,^[38] reproduced with copyright permission.