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

Tyson Family Adds $1 Million Gift During Dedication of Iconic Research Building

John Tyson, chairman of Tyson Foods, announced a new gift during dedication ceremonies for the new Don Tyson Center for Agricultural Sciences.

U of A Faculty, Staff, Students Present Research at National Association Meeting

University of Arkansas faculty and staff members and graduate students took part recently in the American Association for Adult and Continuing Education annual conference in Memphis.

Exercise Science Doctoral Students to Talk About Their Research Friday

Wesley Haynie and Hyun-Gyu "Sean" Suh, doctoral students in exercise science, will give research presentations from 3 to 4 p.m. Friday, Nov. 17, in HPER 311.

MyDocs, Gizmo, SharePoint and Other Services Affected by Weekend Maintenance

On Saturday morning, MyDocs, Gizmo, SharePoint and other systems relying on the SQL server will be briefly interrupted during routine Windows Server maintenance.

Participants Needed for Study Examining Effect of Diet on Health in Families

The Department of Food Science is recruiting families, defined as at least one parent/guardian, with at least one child between the ages of 6-12 years to participate in a nutrition study.

Newswire Daily