Nano-Optical Research Reveals Insight for Improved Plasmonic Grating Design

Ahmad Darweesh, left, and Stephen Bauman
University Relations

Ahmad Darweesh, left, and Stephen Bauman

FAYETTEVILLE, Ark. – University of Arkansas researchers have discovered that a newly developed plasmonic fabrication capability and design can improve the performance of biosensors, solar cells and photodetectors.

The researchers published their findings in Photonics Research, a journal of the Optical Society of America.

Plasmons are waves of electrons in metallic structures that scatter light depending on the structure geometry as well as other variables. This light can be strengthened by controlling different parameters of the nanostructures, and can be focused to a nanoscale volume, which is usually difficult to do because of the optical diffraction limit.

The study shows that a novel dual-width design for plasmonic devices has a performance that is more than double compared to that of traditional plasmonic grating structures. The two structures of different widths have different individual resonances when isolated from one another, so bringing them within a few nanometers causes the two to couple to one another, creating a new “hybridized” plasmonic resonance.

The study’s co-authors are Ahmad Darweesh and Stephen Bauman, both doctoral students in the U of A’s microelectronics-photonics graduate program, and Joseph B. Herzog, assistant professor in the Department of Physics in the J. William Fulbright College of Arts and Sciences. The authors presented aspects of their study in August at the SPIE Optics and Photonics Conference in San Diego. SPIE is the international society for optics and photonics.

Bauman is a Doctoral Academy Fellow at the U of A. Darweesh is studying at the university on a scholarship from Iraqi Ministry of Higher Education and Scientific Research. Both are officers of the Arkansas Laserbacks SPIE student chapter.

Contacts

Joseph B. Herzog, assistant professor
Department of Physics
479-575-4217, jbherzog@uark.edu

Chris Branam, research communications writer/editor
University Relations
479-575-4737, cwbranam@uark.edu

Headlines

'The House and the City: Two Collages' Exhibition on Display Through Oct. 20 in Vol Walker Hall

The exhibition "The House and the City: Two Collages" will be on display through Oct. 20 in the Fred and Mary Smith Exhibition Gallery in Vol Walker Hall. A reception will be held at 5 p.m. Sept. 19.

Congratulations Employees of the 3rd Quarter

Alex Booth, Terry Garrity, JoAnn Kvamme, Leonard Ridley and David Stowers were named the Employees of the 3rd Quarter for the 2019-20 academic year.

Get Connected at HillFest Today

HillFest, an information fair for students to meet campus departments and registered student organizations, is happening today on the Arkansas Union Mall from 11 a.m. to 2 p.m.

Career Fest 2019, Co-Sponsored by Walmart

The University Career Development Center, in collaboration with Walmart, will host Career Fest from noon to 3 p.m. Wednesday, Sept. 4, in the Verizon Ballroom of the Arkansas Union.

Physics Students to Speak About Summer Research Projects

Jack Freeland and Davis Campbell will talk about their research experiences at 4 p.m. Friday, Aug. 30, in Physics Building Room 133.

Newswire Daily