Page 23 - Summer 2015

Dimitrios L. Sounas is a postdoctoral
fellow with the Metamaterials and Plas-
monics Research Group, University of
Texas at Austin. His research interests
span a broad range of areas, including
microwaves, optics, metamaterials, and
acoustics. He is the author or coauthor
of 36 journal papers, 64 conference papers, 2 book chapters and 4 patents. His papers have been published in journals such as Science, Nature Physics, Nature Communications, and Physical Review Letters. His work has been covered by the general media and recently resulted in a start-up com- pany on magnetic-free circulators.
Michael R. Haberman is a Research Sci- entist at Applied Research Laboratories and Department of Mechanical Engi- neering, University of Texas at Austin. He received a BS in Mechanical Engi- neering from the University of Idaho in 2000, MS and PhD degrees from Geor-
gia Institute of Technology in 2001 and 2007, respectively, and Diplôme de Doctorat in Engineering Mechanics from Université de la Lorraine, Metz, France, in 2006. His research interests include wave phenomena in complex acoustic and elastic media, acoustic materials design, nondestructive test- ing, and acoustic transducers. He received a 2012 ASNT Fel- lowship Award and serves as an Associate Editor of JASA.
Andrea Alù is an Associate Professor
and Endowed Faculty Fellow in Engi-
neering at the University of Texas at
Austin. He received Laurea, MS, and
PhD degrees from the University of
Roma Tre, Italy, in 2001, 2003, and
2007, respectively. His research inter-
ests span a broad range of areas, including metamaterials and plasmonics, electromagnetics, optics, and acoustics. He has published over 300 journal papers and received several professional awards, including the 2015 NSF Alan T. Water- man Award, the 2013 OSA Adolph Lomb Medal, and the 2011 URSI Issac Koga Gold Medal. He is a fellow of OSA and IEEE.
References
Boechler, N., Theocharis, G., and Daraio, C. (2011). Bifurcation-based acoustic switching and rectification. Nature Materials 10, 665-669.
Casimir, H. B. G. (1945). On Onsager’s principle of microscopic reversibil- ity. Reviews of Modern Physics 17, 343–350.
Fleury, R., Sounas, D. L., and Alù, A. (2015). A subwavelength ultrasonic circulator based on spatio-temporal modulation. Physical Review B 91, 174306.
Fleury, R., Sounas, D. L., Sieck, C. F., Haberman, M. R., and Alù, A. (2014). Sound isolation and giant linear nonreciprocity in a compact acoustic cir- culator. Science 343, 516-519.
Godin, O. A. (1997). Reciprocity and energy theorems for waves in a com- pressible inhomogeneous moving fluid. Wave Motion 25, 143–167.
Helmholtz, H. (1860). Theorie der Luftschwingungen in Röhren mit offenen Enden. Journal für die reine und angewandte Mathematik 57, 1-72.
Jalas, D., Petrov, A., Eich, M., Freude, W., Fan, S., Yu, Z., Baets, R., Popović, M., Melloni, A., Joannopoulos, J. D., Vanwolleghem, M., Doerr C. R., and Renner, H. (2013). What is — and what is not — an optical isolator. Nature Photonics 7, 579–582.
Khanikaev, A.B., Fleury, R., Mousavi, H.S., and Alù, A. (2015), “Topologi- cally robust sound propagation in an angular-momentum-biased gra- phene-like resonator lattice, Nature Communications, accepted.
Kittel, C. (1958). Interaction of spin waves and ultrasonic waves in ferro- magnetic crystals. Physical Review 110, 836-841.
Lamb, H. (1888). On reciprocal theorems in dynamics. Proceedings of the London Mathematical Society 19, 144–151.
Landau, L. D., and Lifshitz, E. M. (1960). Electrodynamics of Continuous Media. Addison-Wesley, Reading, MA.
Lax, B., and Button, K. J. (1962). Microwave Ferrites and Ferrimagnetics. McGraw-Hill, New York.
Liang, B., Guo, X. S., Tu, J., and Zhang, D. (2010). An acoustic rectifier. Na- ture Materials 9, 989-992.
Liang, B., Yuan, B., and Cheng, J. C. (2009). Acoustic diode: Rectification of acoustic energy flux in one-dimensional systems. Physical Review Letters 103, 104301.
Maldovan, M. (2013). Sound and heat revolutions in phononics. Nature 503, 209–217.
Maznev, A. A., Every, A. G., and Wright, O. B. (2013). Reciprocity in re- flection and transmission: What is a “phonon diode”? Wave Motion 50, 776-784.
Morse, P. M., and Ingard, K. U. (1968). Theoretical Acoustics. McGraw-Hill, New York.
Pierce, A. D. (1981). Acoustics: An Introduction to Its Physical Principles and Applications. Acoustical Society of America, Woodbury, NY.
Popa, B.-I., and Cummer, S. A. (2014). Non-reciprocal and highly nonlinear active acoustic metamaterials. Nature Communications 5, 3398.
Pozar, D. M. (2005). Microwave Engineering. John Wiley & Sons, Hoboken, NJ.
Rayleigh, Lord (J. W. Strutt). (1873). Some general theorems relating to vi- brations. Proceedings of the London Mathematical Society 4, 357–368.
Rayleigh, Lord (J. W. Strutt). (1877). The Theory of Sound, Vol. II. Dover reprint, Dover Publications, New York, 1945.
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