WNCG alumna Nasim Mohammadi Estakhri recently received a Graduate Student Fellowship from the IEEE Photonics Society. The program provides fellowships to outstanding graduate students pursuing education within the society’s field of interest. The fellowship is usually awarded to a student who, at the time of nomination, are in their final year of graduate study.
Prof. Andrea Alù was recently appointed as a Simons Investigator in Physics. This program aims to provide a stable base of support for outstanding scientists, and enables them to undertake long-term investigations of fundamental questions in their fields.
WNCG student Jason Soric received Honorable Mention in the Student Paper Competition at the IEEE International Symposium on Antennas and Propagation and North American Radio Science Meeting. The symposium, which was held in Vancouver, Canada this summer, provides an international forum for the exchange of information on state-of-the-art research in antennas, propagation, electromagnetic engineering and radio science.
WNCG Postdoctoral Associate Juan Sebastian Gomez-Diaz received the Junior Raj Mittra Travel Grant (RMTG) award to attend the 2015 IEEE International Symposium on Antennas and Propagation and North American Radio Science Meeting, which will take place in Vancouver, Canada this July.
Recent years witnessed a surge of interest in metasurfaces providing phase-discontinuities, which find novel applications in flat lenses, spin-orbit manipulation, wavefront engineering, information processing, and holography, to name a few. Compared to conventional lenses or imaging devices, metasurfaces provide an alternative approach to wave control and manipulation, thickness reduction, pixel refinement, and transverse resolution.
Metamaterials and artificial materials with effective properties that may be controlled to a large degree have been at the basis of exciting schemes for wave manipulation and are particularly well suited to hide an object from electromagnetic waves. To realize practical invisibility cloaks, transformation electromagnetics (TE) methods and scattering cancellation techniques are currently the most popular approaches. Simplified versions of these proposals have been implemented and examined in recent years.
In this work, WNCG Prof. Andrea Alù, WNCG student Jing Bai and Prof. Khai Q. Le from Hoa Sen University in Vietnam theoretically explore signatures of plasmonic Fano interferences in a sub-wavelength-plasmonic metamolecule. Consisting of closely packed asymmetric gold nanodimers, these signatures lead to the possibility of generating multiple Fano resonances in the scattering spectrum. This spectral feature is attributed to the interference between bright and dark plasmonic modes sustained by the constituent nanodimers.
Sensing an incoming signal is typically associated with absorbing a portion of its energy, inherently perturbing the measurement and creating reflections and shadows. Here, in contrast, Prof. Andrea Alù and students Romain Fleury and Dimitrios Sounas demonstrate a non-invasive, shadow-free, invisible sensor for airborne sound waves at audible frequencies, which fully absorbs the impinging signal, without at the same time perturbing its own measurement or creating a shadow.
Join Prof. Andrea Alù as he shares insight into his work with metamaterials, light and an "invisibility cloak."
Reciprocity is a general symmetry property that applies to the vast majority of materials. If an antenna transmits towards a specific direction, it must also receive signals from that same direction. To protect sources and improve communication systems, it is desirable to build components not bound by reciprocity requirements that can transmit and receive signals in the same channel without interference.
