About

Jordan Robert Foreman is an Assistant Professor of Urology at Duke University, specializing in Reconstructive Urology and Genitourinary Cancer Survivorship. He is affiliated with the Duke Department of Urology and is involved in clinical and research activities related to urological reconstructive procedures and the management of genitourinary cancers. His role encompasses both patient care and research, contributing to advancements in urological treatments and survivorship. Further details about his specific research interests, background, or key contributions are not provided in the available page text.

Research topics

• Materials science
• Optoelectronics
• Optics
• Atomic physics
• Physics

Selected publications

• How sulfidation of ZnO powders enhances visible fluorescence

  Journal of Materials Chemistry C · 2017-01-01 · 7 citations

  article

  The type-II alignment of ZnS domains in sulfidated ZnO phosphors scavenges free holes, dramatically enhancing white fluorescence from oxygen vacancies.

  PublisherDOI

• Localized excitons mediate defect emission in ZnO powders

  Journal of Applied Physics · 2013-04-05 · 37 citations

  article1st authorCorresponding

  A series of continuous-wave spectroscopic measurements elucidates the mechanism responsible for the technologically important green emission from deep-level traps in ZnO:Zn powders. Analysis of low-temperature photoluminescence (PL) and PL excitation spectra for bound excitons compared to the temperature-dependent behavior of the green emission reveals a deep correlation between green PL and specific donor-bound excitons. Direct excitation of these bound excitons produces highly efficient green emission from near-surface defects. When normalized by the measured external quantum efficiency, the integrated PL for both excitonic and green emission features grows identically with excitation intensity, confirming the strong connection between green emission and excitons. The implications of these findings are used to circumscribe operational characteristics of doped ZnO-based white light phosphors whose quantum efficiency is almost twice as large when the bound excitons are directly excited.

  PublisherDOI

• The dependence of ZnO photoluminescence efficiency on excitation conditions and defect densities

  Applied Physics Letters · 2013-11-11 · 34 citations

  article

  The quantum efficiencies of both the band edge and deep-level defect emission from annealed ZnO powders were measured as a function of excitation fluence and wavelength from a tunable sub-picosecond source. A simple model of excitonic decay reproduces the observed excitation dependence of rate constants and associated trap densities for all radiative and nonradiative processes. The analysis explores how phosphor performance deteriorates as excitation fluence and energy increase, provides an all-optical approach for estimating the number density of defects responsible for deep-level emission, and yields new insights for designing efficient ZnO-based phosphors.

  PublisherDOI

• Thermal emission from a metamaterial wire medium slab

  Optics Express · 2012-04-13 · 23 citations

  articleOpen access

  We investigate thermal emission from a metamaterial wire medium embedded in a dielectric host and highlight two different regimes for efficient emission, respectively characterized by broadband emission near the effective plasma frequency of the metamaterial, and by narrow-band resonant emission at the band-edge in the Bragg scattering regime. We discuss how to control the spectral position and relative strength of these two emission mechanisms by varying the geometrical parameters of the proposed metamaterial and its temperature.

  PublisherDOI

• Taming the thermal emissivity of metals: A metamaterial approach

  Applied Physics Letters · 2012-05-14 · 32 citations

  articleOpen access

  We demonstrate the possibility of realizing temporally coherent, wide-angle, thermal radiation sources based on the metamaterial properties of metallic gratings. In contrast to other approaches, we do not rely on the excitation of surface waves such as phonon-polaritons, plasmon-polaritons, or guided mode resonances along the grating, nor on the absorption resonances of extremely shallow metallic grating. Instead, we exploit the effective bulk properties of a thick metallic grating below the first diffraction order. We analytically model this physical mechanism of temporally coherent thermal emission based on localized bulk resonances in the grating. We validate our theoretical predictions with full-wave numerical simulations.

  PublisherOA PDFDOI

• Highly Efficient Defect Emission from ZnO and ZnO:S

  Bulletin of the American Physical Society · 2012-02-27

  article
  Publisher

• Substrate effects and photon energy dependence of ultrafast carrier relaxation in graphene

  Bulletin of the American Physical Society · 2012-02-29

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  Publisher

• Ultraviolet surface-enhanced Raman scattering at the plasmonic band edge of a metallic grating

  Optics Express · 2012-01-12 · 35 citations

  articleOpen access

  Surface-enhanced Raman Scattering (SERS) is studied in sub-wavelength metallic gratings on a substrate using a rigorous electromagnetic approach. In the ultraviolet SERS is limited by the metallic dampening, yet enhancements as large as 10(5) are predicted. It is shown that these enhancements are directly linked to the spectral position of the plasmonic band edge of the metal/substrate surface plasmon. A simple methodology is presented for selecting the grating pitch to produce optimal enhancement for a given laser frequency.

  PublisherDOI

• Metamaterials for Thermal Emission

  2012-01-01

  article

  Get PDF Email Share Share with Facebook Tweet This Post on reddit Share with LinkedIn Add to CiteULike Add to Mendeley Add to BibSonomy Get Citation Copy Citation Text G. D'Aguanno, N. Mattiucci, A. Alù, C. Argyropoulos, J. V. Foreman, and M. J. Bloemer, "Metamaterials for Thermal Emission," in Frontiers in Optics 2012/Laser Science XXVIII, OSA Technical Digest (online) (Optica Publishing Group, 2012), paper FTh2A.5. Export Citation BibTex Endnote (RIS) HTML Plain Text Get Video Citation alert Save article

  PublisherDOI

• Nanotechnology research and development for military and industrial applications

  Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE · 2011-03-24 · 3 citations

  articleOpen access

  Researchers at the Army Aviation and Missile Research, Development, and Engineering Center (AMRDEC) have initiated multidiscipline efforts to develop nano-based structures and components for insertion into advanced missile, aviation, and autonomous air and ground systems. The objective of the research is to exploit unique phenomena for the development of novel technology to enhance warfighter capabilities and produce precision weapons. The key technology areas that the authors are exploring include nano-based microsensors, nano-energetics, nano-batteries, nano-composites, and nano-plasmonics. By integrating nano-based devices, structures, and materials into weaponry, the Army can revolutionize existing (and future) missile systems by significantly reducing the size, weight and cost. The major research thrust areas include the development of chemical sensors to detect rocket motor off-gassing and toxic industrial chemicals; the development of highly sensitive/selective, self-powered miniaturized acoustic sensors for battlefield surveillance and reconnaissance; the development of a minimum signature solid propellant with increased ballistic and physical properties that meet insensitive munitions requirements; the development of nano-structured material for higher voltage thermal batteries and higher energy density storage; the development of advanced composite materials that provide high frequency damping for inertial measurement units' packaging; and the development of metallic nanostructures for ultraviolet surface enhanced Raman spectroscopy. The current status of the overall AMRDEC Nanotechnology research efforts is disclosed in this paper. Critical technical challenges, for the various technologies, are presented. The authors' approach for overcoming technical barriers and achieving required performance is also discussed. Finally, the roadmap for each technology, as well as the overall program, is presented.

  PublisherOA PDFDOI

Frequent coauthors

• Henry O. Everitt

  139 shared

• Jie Liu

  56 shared

• V. Roppo

  34 shared

• Mark J. Bloemer

  United States Army Combat Capabilities Development Command

  29 shared

• M. Scalora

  26 shared

• Jinxin Yang

  Huaqiao University

  20 shared

• Soojeong Choi

  18 shared

• Hongying Peng

  University of Cincinnati Medical Center

  18 shared