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RAP opportunity at Naval Research Laboratory     NRL

Optical and Structural Properties of Wide Bandgap Semiconductors


Naval Research Laboratory, DC, Electronics Science & Technology Division

opportunity location
64.15.25.B4347 Washington, DC 203755321


name email phone
Jaime A. Freitas 202.404.4536


Current research focuses on the study of point defects; unintentional and intentional doping; and extended defects in bulk, and homo- and hetero-epitaxial layers of wide bandgap semiconductors. We are particularly interested in semiconductors such as GaN, AIN, AlxGal-xN, SiC (3C, 4H, 6H) ZnO, ZnSe, ZnS, BN, and diamond. We use a combination of defect sensitive techniques to detect and identify defects, and to develop a fundamental understanding of their role on the structural, optical, and electronic properties of the materials. Raman scattering, photoluminescence (PL), time-resolved PL, PL-excitation, ultraviolet-visible-infrared absorption, cathodoluminescence (CL), electro-luminescence, photo-induced current, PL-imaging, CL-imaging, scanning electron microscopy, secondary electron imaging, are employed in these investigations. Variable temperature dewars for macroscopic and microscopic optical studies are available. A large selection of single crystal bulk and films as well as devices structures are also available.


key words
Cathodoluninescence; absorption; Photoluminescence (PL); PL Excitation; Pulsed Luminescence excitation; Raman scattering; Luminescence imaging


Citizenship:  Open to U.S. citizens and permanent residents
Level:  Open to Postdoctoral applicants


Base Stipend Travel Allotment Supplementation
$94,199.00 $3,000.00
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