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Jim Coe received his B.A. with Honors in 1980 from Swarthmore College, and his Ph.D. in 1986 from The Johns Hopkins University (advisor Kit H. Bowen) where he was awarded the Roseman Award for excellence in research. Postdoctoral work was done at the University of California, Berkeley (advisor Richard J. Saykally). He has been a faculty member at The Ohio State University since 1989, being promoted to Associate Professor in 1995 and Full Professor in 2007. He was given the Outstanding Service Award in 1999 by the ACS Columbus Section for work as Program Chair of the 31st ACS Central Regional Meeting, was elected a Fellow of the American Physical Society in 2008, and has been on the Editorial Board of the journal Plasmonics since 2005.
Plasmonics in the Infrared:
Sensing & Spectra of Particles Smaller than the Wavelength
Metal films with arrays of microholes (mesh) exhibit surface-plasmon-mediated, extraordinary infrared (IR) transmission resonances. The Coe Group develops applications of this IR plasmonic mesh for chemistry. It is possible to record a scatter-free IR absorption spectrum of single particle in a mesh hole, which is notable because the spectra of particles of size similar to the wavelength are generally dominated by scattering.
For a visual introduction to surface plasmon polaritons, go to the "Research Page" tab and choose "Movie Introduction to Plasmonics".
The top image at right is the cover page of our feature article in J. Phys. Chem. C. It shows how the resonances in the transmission spectrum of the mesh disperse with a change in the angle of incident light. The top part shows schematically that light travels along the surface of the mesh before joining the transmitted beam without scattering.
The second image shows the IR transmission spectrum of a mesh using a standard benchtop FTIR instrument (zero order, perpendicular incidence). It shows many narrow transmission resonances of a mesh with holes closed down to 3 micrometers.
The third image from top shows a scanning electron microscope (SEM) image of a dust particle trapped in a mesh hole. We have recorded the IR absorption spectrum of this particle using an imaging FTIR microscope, as well as a library of IR absorption spectra of 63 individual dust particles trapped from our lab air and isolated in this way on our mesh. One of our projects seeks to identify the chemical composition of airborne dust particles which can be breathed into the lungs.
The bottom image (left side) shows an SEM image of 5 micrometer latex spheres trapped in mesh holes. On the right side is a three dimensional, finite difference time domain simulation (FDTD) of the system in crossection. There is electromagnetic activity near the hole long after the incident and reflected pulses are gone. In addition to experiments, we perform simulations of spectra using FDTD software. We have generated a number of movies to visually illustrate basic plasmonic effects that can be seen by clicking on our "Research Page" link and choosing the "Movie Introduction to Plasmonics" tab.
J.M. Heer and J.V. Coe, “3D-FDTD Modeling of Angular Spread for the Extraordinary Transmission Spectra of Metal Films with Arrays of Subwavelength Holes”, Plasmonics, in press, published online.
K. E. Cilwa, M. McCormack, M. Lew, C. Robitaille, L. Corwin, M.A. Malone, and J.V. Coe, “Scatter-Free IR Absorption Spectra of Individual, 3-5 μm, Airborne, Dust Particles Using Plasmonic Metal Microarrays: A Library of 63 Spectra”, J. Phys. Chem. C 115, 16910–16919 (2011).
M. A. Malone, K. E. Cilwa, M. McCormack, and J.V. Coe “Modifying an Infrared Microscope to Characterize Propagating Surface Plasmon Polariton Mediated Resonances”, J. Phys. Chem. 115, 12250–12254 (2011).
M. A. Malone, S. Prakash, J.M. Heer, L.D. Corwin, K. E. Cilwa, and J.V. Coe, “Modifying infrared scattering effects of single yeast cells with plasmonic metal mesh”, J. Chem. Phys. 133, 185101 (2010).
J. Heer, L. Corwin, K. Cilwa, M. Malone Jr., and J. V. Coe, “Infrared Sensitivity of Plasmonic Metal Films with Hole Arrays to Microspheres In and Out of the Holes”, J. Phys. Chem. C, 114, 520-525 (2010).
K.E. Cilwa, K.R. Rodriguez, J.M. Heer, M.A. Malone, L.D. Corwin, and J.V. Coe, ”Propagation lengths of surface plasmon polaritons on metal films with arrays of subwavelength holes by infrared imaging spectroscopy,” J. Chem. Phys. 131(6), 061101 (2009).
J.V. Coe, S.M. Williams, and K.H. Bowen, “Photoelectron spectra of hydrated electron clusters vs cluster size: Connecting to bulk”, Int. Rev. Phys. Chem., 27(1), 27-51 (2008).
J.V. Coe, J.M. Heer, S. Teeters-Kennedy, H. Tian, and K.R. Rodriguez, “Extraordinary Transmission of Metal Films with Arrays of Subwavelength Holes”, Ann. Rev. Phys. Chem. 59 179-202 (2008).
J. V. Coe, K.R. Rodriguez, S. Teeters-Kennedy, K. Cilwa, J.M. Heer, and H. Tian, and S.M. Williams, “Metal Films with Arrays of Tiny Holes: Spectroscopy with Infrared Plasmonic Scaffolding”, J. Phys. Chem. C 111(47) 17459-17472 (2007), featured article.
K.R. Rodriguez, H. Tian, J.M. Heer, and J.V. Coe, “Extraordinary Infrared Transmission Resonances of Metal Microarrays for Sensing Nanocoating Thickness”, J. Phys. Chem. C, 111 12106-12111 (2007).
K.R. Rodriguez, H. Tian, J.M. Heer, S. Teeters-Kennedy, and J.V. Coe, “Interaction of an infrared surface plasmon with an excited molecular vibration”, J. Chem. Phys. 126 151101, 5 pps (2007).
S.M. Teeters-Kennedy, S.M. Williams, K.R. Rodriguez, K. Cilwa, D. Meleason, A. Sudnitsyn, F. Hrovat, and J.V. Coe, “Extraordinary Infrared Transmission of a Stack of Two Metal Micromeshes”, J. Phys. Chem. C, (2007), 111, 124-130.
K.R. Rodriguez, S.M. Williams, M.A. Young, S.M. Teeters-Kennedy, J.M. Heer, and J.V. Coe, “Carbon Chains and the (5,5) Single-Walled Nanotube: Structure and Energetics vs Length”, J. Chem. Phys., 125 194716, 15 pps, (2006).
S.M. Teeters-Kennedy, K.R. Rodriguez, T.M. Rogers, K.A. Zomcheck, S.M. Williams, A. Sudnitsyn, L. Carter, V. Cherezo, M. Caffrey, and J.V. Coe, “Controlling the Passage of Light through Microchannels by Nanocoatings of Phospholipids”, J. Phys. Chem. B, 110(43) 21719-21727 (2006).
J.V. Coe, S.T. Arnold, J.G. Eaton, G.H. Lee, and K.H. Bowen, “Photoelectron spectra of hydrated electron clusters: Fitting lineshapes and grouping isomers”, J. Chem. Phys., 125(1), 14315 1-11, (2006).
J.V. Coe,S.M. Williams, K.R. Rodriguez, S. Teeters-Kennedy, A. Sudnitsyn, and F. Hrovat “Extraordinary Infrared Transmission of Metallic Arrays of Subwavelength Holes”, Analytical Chemistry, March 1, 78(5), 1385-1390 (2006), Featured Article (A-Page).
S.M. Williams, and J.V. Coe, “Dispersion Study of the Infrared Transmission Resonances of Freestanding Ni Microarrays”, Plasmonics, 1(1), 87-93 (2006).
B. C. Garrett, D. A. Dixon, D. M. Camaioni, D. M. Chipman, M. A. Johnson, C. D. Jonah, G. A. Kimmel, J. H. Miller, T. N. Rescigno, P. J. Rossky, S. S. Xantheas, S. D. Colson, A. H. Laufer, D. Ray, P. F. Barbara, D. M. Bartels, K. H. Becker, K. H. Bowen, S. E. Bradforth,I.Carmichael, J. V. Coe, L. R. Corrales, J. P. Cowin, M. Dupuis, K. B. Eisenthal, J. A. Franz, M. S. Gutowski, K. D. Jordan, B. D. Kay, J. A. LaVerne, S. V. Lymar, T. E. Madey, C. W. McCurdy, D. Meisel, S. Mukamel, A. R. Nilsson, T. M. Orlando, N. G. Petrik, S. M. Pimblott, J. R. Rustad, G. K. Schenter, S. J. Singer, A., Tokmakoff, L.-W. Wang, C. Wittig, and T. S. Zwier, “The Role of Water on Electron-Initiated Processes and Radical Chemistry: Issues and Scientific Advances”, Chemical Reviews 105, 355-389 (2005).
K.R. Rodriguez, S. Shah, S.M. Williams, S. Teeters-Kennedy, and J.V. Coe, “Enhanced IR Absorption Spectra of Self-Assembled Alkanethiol Monolayers using the Extraordinary IR Transmission of Metallic Arrays of Subwavelength Apertures”, J. Chem. Phys. 121(18), 8671-8675 (2004).
S.M. Williams, K.R. Rodriguez, S. Teeters-Kennedy, A.D. Stafford, S.R. Bishop,U.K. Lincoln, and J.V. Coe, “Using the extraordinary infrared transmission of metallic subwavelength arrays to study the catalyzed reaction of methanol to formaldehyde on copper oxide”, J. Phys. Chem. B, 108 11833-11837 (2004).
S.M. Williams, K.R. Rodriguez, S.M. Teeters-Kennedy, S. Shah, T.M. Rogers, A.D. Stafford, and J.V. Coe, “Scaffolding for Nanotechnology: Extraordinary IR Transmission of Metal Microarrays for Stacked Sensors and Surface Spectroscopy”, Nanotechnology, 15 S495-S503 (2004).
S.M. Williams, A.D. Stafford, T.M. Rogers, Sarah R. Bishop, and J.V. Coe, “Extraordinary Infrared Transmission of Cu-Coated Arrays with Subwavelength Apertures: Hole Size and the Transition from Surface Plasmon to Waveguide Transmission”, Appl. Phys. Lett. 85(9), 1472-1474 (2004).
S.M. Williams, A.D. Stafford, K.R. Rodriguez, T.M. Rogers, and J.V. Coe, “Accessing Surface Plasmons with Ni Microarrays for Enhanced IR Absorption by Monolayers”, J. Phys. Chem. B, 107 11871-11879 (2003).