{"id":27271,"date":"2015-03-31T23:44:25","date_gmt":"2015-03-31T21:44:25","guid":{"rendered":"https:\/\/icmsva.vallealto.es\/?articulos_sci=an-optically-controlled-microscale-elevator-using-plasmonic-janus-particles"},"modified":"2026-04-14T11:47:38","modified_gmt":"2026-04-14T09:47:38","slug":"an-optically-controlled-microscale-elevator-using-plasmonic-janus-particles","status":"publish","type":"articulos_sci","link":"https:\/\/icmsva.vallealto.es\/?articulos_sci=an-optically-controlled-microscale-elevator-using-plasmonic-janus-particles","title":{"rendered":"An Optically Controlled Microscale Elevator Using Plasmonic Janus Particles"},"content":{"rendered":"<figure><img decoding=\"async\" src=\"https:\/\/icmsva.vallealto.es\/wp-content\/uploads\/2015\/03\/An-Optically-Controlled-Microscale-Elevator-Using-1.png\" alt=\"An Optically Controlled Microscale Elevator Using Plasmonic Janus Particles\" \/><\/figure>\n<p>In this article, we report how Janus particles, composed of a silica sphere with a gold half-shell, can be not only stably trapped by optical tweezers but also displaced controllably along the axis of the laser beam through a complex interplay between optical and thermal forces. Scattering forces orient the asymmetric particle, while strong absorption on the metal side induces a thermal gradient, resulting in particle motion. An increase in the laser power leads to an upward motion of the particle, while a decrease leads to a downward motion. We study this reversible axial displacement, including a hysteretic jump in the particle position that is a result of the complex pattern of a tightly focused laser beam structure above the focal plane. As a first application we simultaneously trap a spherical gold nanoparticle and show that we can control the distance between the two particles inside the trap. This photonic micron-scale \u201celevator\u201d is a promising tool for thermal force studies, remote sensing, and optical and thermal micromanipulation experiments.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>In this article, we report how Janus particles, composed of a silica sphere with a gold half-shell, can be not only stably trapped by optical tweezers but also displaced controllably along the axis of the laser beam through a complex interplay between optical and thermal forces. Scattering forces orient the asymmetric particle, while strong absorption&hellip;<\/p>\n","protected":false},"featured_media":27275,"template":"","autores":[],"grupos_de_investigacion":[146],"revistas":[159],"anos":[890],"class_list":["post-27271","articulos_sci","type-articulos_sci","status-publish","has-post-thumbnail","hentry","grupos_de_investigacion-materiales-opticos-multifuncionales","revistas-acs-photonics","anos-890","description-off"],"acf":[],"_links":{"self":[{"href":"https:\/\/icmsva.vallealto.es\/index.php?rest_route=\/wp\/v2\/articulos_sci\/27271","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/icmsva.vallealto.es\/index.php?rest_route=\/wp\/v2\/articulos_sci"}],"about":[{"href":"https:\/\/icmsva.vallealto.es\/index.php?rest_route=\/wp\/v2\/types\/articulos_sci"}],"version-history":[{"count":1,"href":"https:\/\/icmsva.vallealto.es\/index.php?rest_route=\/wp\/v2\/articulos_sci\/27271\/revisions"}],"predecessor-version":[{"id":27276,"href":"https:\/\/icmsva.vallealto.es\/index.php?rest_route=\/wp\/v2\/articulos_sci\/27271\/revisions\/27276"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/icmsva.vallealto.es\/index.php?rest_route=\/wp\/v2\/media\/27275"}],"wp:attachment":[{"href":"https:\/\/icmsva.vallealto.es\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=27271"}],"wp:term":[{"taxonomy":"autores","embeddable":true,"href":"https:\/\/icmsva.vallealto.es\/index.php?rest_route=%2Fwp%2Fv2%2Fautores&post=27271"},{"taxonomy":"grupos_de_investigacion","embeddable":true,"href":"https:\/\/icmsva.vallealto.es\/index.php?rest_route=%2Fwp%2Fv2%2Fgrupos_de_investigacion&post=27271"},{"taxonomy":"revistas","embeddable":true,"href":"https:\/\/icmsva.vallealto.es\/index.php?rest_route=%2Fwp%2Fv2%2Frevistas&post=27271"},{"taxonomy":"anos","embeddable":true,"href":"https:\/\/icmsva.vallealto.es\/index.php?rest_route=%2Fwp%2Fv2%2Fanos&post=27271"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}