Current Research Projects

The Herzog Lab research program specializes in the following areas:

Nano-Fabrication: Researcher in group fabricate metal nanostructures with features that can be smaller than structures fabricated with the more-common electron beam lithography (EBL) technique. Typically the smallest feature with EBL alone can reach about 40 nm. In our lab we use EBL combined with a recently developed self-aligned technique which can make truly nanoscale features than can be less than 10 nm. Read more...

Computational Electromagnetics: Modeling optics (electromagnetic waves) with a finite element method has proven to be extremely accurate. We use this tool to help design and analyze plasmonic nanostructure. Recent developments in computational performance enables complex and robust calculations and modeling. Research in the area involves 3D designs and studies, and use of high performance super computing. Read more...

Spectroscopic Optical Characterization: Once fabricated, our group measures the optical properties of the plasmonic nanostructures with various spectroscopic techniques in order to confirm our design and build towards more useful and efficient structures. Optical characterization techniques include Dark-field spectroscopy, Raman spectroscopy, and Photoluminescence experiments. Read more...

Photonic Crystal Nanostructures: Our group studies the optical properties of photonic crystal (PC) structures. PCs are periodic structures that can reflect or guide light very efficiently. This work, in collaboration with A. Alverson, studies diatoms which have a natural nanostructures in their shells (or frustules). Additionally, group members study the optical properties of other recently-developed PC fabrication techniques. Read more...

Research Areas of Interest

Optical Properties of Nanostructures and Devices:
Plasmonics, Spectroscopy, Nanofabrication, Quantum Dots, Nanowires, Superlattices, Photonic Crystals, and Computational Modeling of these structures.

Optoelectronic Materials and Devices for Energy Conversion:
Solar cells, Plasmonically enhanced photovoltaics, and thermophotovoltaics.

Other Areas:
Surface-enhanced spectroscopy, Nano-optics, and Nanofabrication

Figure 2 Scanning Electron Microscope (SEM) images of various test structures. All images are on the same scale with a micron bar of 20 microns. This is roughly the diameter of very fine human hair! Images taken with Philips Environmental SEM part of the Arkansas Nano-Bio Materials Characterization Facility.

Department of Physics  |  226 Physics Building  |  825 West Dickson Street  |  Fayetteville, AR 72701
Phone: (479) 575-2506  |  Fax: (479) 575-4580  |  email:
Last Update: Fall 2013