{"id":7956,"date":"2023-07-17T14:51:24","date_gmt":"2023-07-17T06:51:24","guid":{"rendered":"https:\/\/www.huashu-tech.com\/?p=7956"},"modified":"2023-07-17T14:51:24","modified_gmt":"2023-07-17T06:51:24","slug":"waveguiding-and-detecting-structure-for-surface-plasmon-polaritons-on-silicon","status":"publish","type":"post","link":"https:\/\/www.huashu-tech.com\/vi\/waveguiding-and-detecting-structure-for-surface-plasmon-polaritons-on-silicon\/","title":{"rendered":"Waveguiding and detecting structure for surface plasmon polaritons on silicon"},"content":{"rendered":"<p>Toyohashi Tech researchers have developed a simple, low-loss waveguide for Surface Plasmon Polaritons (SPPs) that is applicable to nanoscale photonic integrated circuits on silicon.<\/p>\n<section class=\"article-banner first-banner ads-336x280\">\n<div id=\"div-gpt-ad-1449240174198-2\"><\/div>\n<\/section>\n<p>&nbsp;<\/p>\n<p>Surface plasmon polaritons (SPPs) are waves that propagate along the surface of a conductor and collective oscillation of electrons coupled with the optical field at the nano-scale beyond the\u00a0<a class=\"textTag\" href=\"https:\/\/phys.org\/tags\/diffraction+limit\/\" rel=\"tag\">diffraction limit<\/a>\u00a0of propagating light waves. Recently, there is increasing interest in SPPs as signal carriers in nanoscale\u00a0<a class=\"textTag\" href=\"https:\/\/phys.org\/tags\/integrated+circuits\/\" rel=\"tag\">m\u1ea1ch t\u00edch h\u1ee3p<\/a>\u00a0to increase the degree of accumulation and reduce power consumption.<\/p>\n<p>However, low-loss SPP waveguides with detectors have not been developed for applying to nanoscale integrated circuits.<\/p>\n<p>Now, Mitsuo Fukuda and his group at Toyohashi Tech have developed a simple, low-loss waveguide for SPPs that is applicable to nanoscale integrated circuits.<\/p>\n<p>A thin metal film deposited on a\u00a0<a class=\"textTag\" href=\"https:\/\/phys.org\/tags\/silicon+substrate\/\" rel=\"tag\">silicon substrate<\/a>\u00a0was terminated with a diffraction structure (a multi-slit or a metal disk array) at the end to guide the SPPs transmitted on the surface (air-metal interface) to the opposite side of the metal (metal-silicon interface). A Schottky barrier is formed at the metal-silicon interface, and the free electrons in the metal are excited by the guided SPPs and then cross over the barrier. The overflowing electrons result in observable photocurrents.<\/p>\n<p>The waveguide developed in this research enabled the efficient propagation of SSPs in 1550-nm-wavelength bands (transparent to silicon) along the Au film\u00a0<a class=\"textTag\" href=\"https:\/\/phys.org\/tags\/surface\/\" rel=\"tag\">b\u1ec1 m\u1eb7t<\/a>, and the photocurrents were much larger than for waveguides without the diffraction structure (26 times for the grating structure and 10 times for the disk array).<\/p>\n<p>This waveguide device is expected to contribute to nanoscale photonic integrated circuits on silicon.<\/p>","protected":false},"excerpt":{"rendered":"<p>Toyohashi Tech researchers have developed a simple, low-loss waveguide for Surface Plasmon Polaritons (SPPs) that is applicable to nanoscale photonic integrated circuits on silicon. &nbsp; Surface plasmon polaritons (SPPs) are waves that propagate along the surface of a conductor and collective oscillation of electrons coupled with the optical field at the nano-scale beyond the\u00a0diffraction limit\u00a0of<\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[1],"tags":[],"acf":[],"_links":{"self":[{"href":"https:\/\/www.huashu-tech.com\/vi\/wp-json\/wp\/v2\/posts\/7956"}],"collection":[{"href":"https:\/\/www.huashu-tech.com\/vi\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.huashu-tech.com\/vi\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.huashu-tech.com\/vi\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.huashu-tech.com\/vi\/wp-json\/wp\/v2\/comments?post=7956"}],"version-history":[{"count":1,"href":"https:\/\/www.huashu-tech.com\/vi\/wp-json\/wp\/v2\/posts\/7956\/revisions"}],"predecessor-version":[{"id":7961,"href":"https:\/\/www.huashu-tech.com\/vi\/wp-json\/wp\/v2\/posts\/7956\/revisions\/7961"}],"wp:attachment":[{"href":"https:\/\/www.huashu-tech.com\/vi\/wp-json\/wp\/v2\/media?parent=7956"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.huashu-tech.com\/vi\/wp-json\/wp\/v2\/categories?post=7956"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.huashu-tech.com\/vi\/wp-json\/wp\/v2\/tags?post=7956"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}