title: Circularly polarized light detection with hot electrons in chiral plasmonic metamaterials.
abstract: Circularly polarized light is utilized in various optical techniques and devices. However, using conventional optical systems to generate, analyse and detect circularly polarized light involves multiple optical elements, making it challenging to realize miniature and integrated devices. While a number of ultracompact optical elements for manipulating circularly polarized light have recently been demonstrated, the development of an efficient and highly selective circularly polarized light photodetector remains challenging. Here we report on an ultracompact circularly polarized light detector that combines large engineered chirality, realized using chiral plasmonic metamaterials, with hot electron injection. We demonstrate the detector's ability to distinguish between left and right hand circularly polarized light without the use of additional optical elements. Implementation of this photodetector could lead to enhanced security in fibre and free-space communication, as well as emission, imaging and sensing applications for circularly polarized light using a highly integrated photonic platform.
authors.affiliation: Department of Mechanical Engineering, Vanderbilt University, Nashville, Tennessee 37212, USA.
authors.forename: Wei
authors.identifier: http://orcid.org/0000-0002-2227-9431
authors.initials: W
authors.lastname: Li
authors.affiliation: Department of Mechanical Engineering, Vanderbilt University, Nashville, Tennessee 37212, USA.
authors.forename: Zachary J
authors.initials: ZJ
authors.lastname: Coppens
authors.affiliation: Department of Physics and Astronomy, Ohio University, Athens, Ohio 45701, USA.
authors.forename: Lucas V
authors.identifier: http://orcid.org/0000-0001-7356-7719
authors.initials: LV
authors.lastname: Besteiro
authors.affiliation: Department of Electrical Engineering, Vanderbilt University, Nashville, Tennessee 37212, USA.
authors.forename: Wenyi
authors.initials: W
authors.lastname: Wang
authors.affiliation: Department of Physics and Astronomy, Ohio University, Athens, Ohio 45701, USA.
authors.forename: Alexander O
authors.initials: AO
authors.lastname: Govorov
authors.affiliation: Department of Mechanical Engineering, Vanderbilt University, Nashville, Tennessee 37212, USA.
authors.forename: Jason
authors.initials: J
authors.lastname: Valentine