The manipulation of matter with electromagnetic radiation is a capacity that has been known for over
\na century. However, the prominence of such optical effects only grew rapidly following the invention
\nof optical tweezers in the 1980s. While both the original theory and the early trapping techniques
\nare based on the radiation force, optical tweezing uses the gradient force. This paper aims to
\ndifferentiate between these two clearly distinct types of optical forces, which are sometimes
\nconfused in the literature. We also discuss three completely separate forms of optical torque that
\ncan be applied to a particle, also due to an electromagnetic field. These involve the transfer of
\neither spin or orbital angular momentum from the beam to the particle, depending on the character of
\nthe light, or the often overlooked alignment effect that can act on a cylindrical particle due to a
\ngradient force.<\/p>\n","protected":false},"excerpt":{"rendered":"
The manipulation of matter with electromagnetic radiation is a capacity that has been known for over
\na century. However, the prominence of such optical effects only grew rapidly following the invention
\nof optical tweezers in the 1980s. While both the…<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_genesis_hide_title":false,"_genesis_hide_breadcrumbs":false,"_genesis_hide_singular_image":false,"_genesis_hide_footer_widgets":false,"_genesis_custom_body_class":"","_genesis_custom_post_class":"","_genesis_layout":"","footnotes":""},"categories":[178],"tags":[],"class_list":{"0":"post-374189","1":"post","2":"type-post","3":"status-publish","4":"format-standard","6":"category-rss-fuusikaharidus","7":"entry"},"_links":{"self":[{"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=\/wp\/v2\/posts\/374189","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=374189"}],"version-history":[{"count":0,"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=\/wp\/v2\/posts\/374189\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=374189"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=374189"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=374189"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}