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

Writing Workshop Week Offered for Graduate Students

Vernetta Mosley, founder of Cultivate the Writer, will lead graduate students through discussions on issues related to writing during virtual writing workshops running Monday to Friday, May 17-21. 

Survey Results to Shape Chancellor's Commission on Women Priorities

The Chancellor's Commission on Women surveyed the U of A campus in early spring semester for input in setting the commission's priorities for the 2021-22 academic year.

College of Engineering Celebrates Top Students

The College of Engineering honors its outstanding students at the end of April, including the 2021 Outstanding Senior, Madeline Suellentrop.

Candidates for Dean of Libraries to Visit Campus

Kevin Garewal, associate director of collections at Harvard Law School Library, will be the second candidate to present at 2:30 p.m., Monday, May 17, in the School of Law's E.J. Ball Courtroom.

Call for Scholarly Contributions to Inquiry Journal

The Inquiry Journal, an online publication showcasing the cutting-edge undergraduate research and scholarly activity at the U of A, will resume publication in August. Submit original research by July 1. 

News Daily