Research on Entropy, Noise and Chaos appears in PNAS

Our recent experimental study of time-delayed optoelectronic feedback loops incorporating a photon-counting detector has been published in the Proceedings of the National Academy of Science (PNAS). This paper shows a transition from single-photon shot noise to deterministic chaos, and describes a method for quantifying the entropy that accounts for both deterministic and stochastic uncertainty.

Kyowon Kim Defends Ph.D. Thesis

kyowon-150x150Congratulations to Kyowon Kim who successfully defended his dissertation entitled “Optical and Thermal Properties of Nanoporous Material and Devices”. Kyowon’s research accomplishments include the first ever demonstration of an integrated nanoporous Mach-Zehnder interferometric sensor, and the first measurement of the anisotropy in the thermal conductivity of porous silicon.

Shanshan Li defends Ph.D. Thesis

shanshan-150x150Congratulations to Shanshan Li, who successfully defended her doctoral thesis entitled “Silicon Based Terahertz Waveguides”. Shanshan’s research has been featured in Optics Express, Nature Nanotechnology, New Journal of Physics, IEEE Transactions on THz Technology, and most recently in Optica.

Vincent Pagán Defends Ph.D. Thesis

vrpagan-150x150Congratulations to Vince Pagán, who successfully defended his doctoral thesis entitled “RF Photonic Vector Modulation and Demodulation Techniques for Millimeter-Wave Communications”. Vince’s research has been featured in Optics Express (thrice), Optics Letters (twice), and several major international conferences including CLEO, OFC, MWP, and AVFOP.

Gagan Kumar wins prestigous Ramanujan Fellowship

Prof. Gagan Kumar (IIT Guwahati, and former postdoctoral scholar from our group) has recently been selected to receive a Ramanujan Fellowship.  “The fellowship is meant for brilliant scientists and engineers from all over the world to take up scientific research positions in India, especially those scientists who want to return to India from abroad.  The fellowships are scientist-specific and very selective.”

A Terahertz-driven Electron Gun (Wenqian Huang, MIT)

Wenqian “Ronny” Huang (MIT) will give this week’s ECE graduate student seminar, entitled “A Terahertz-driven Electron Gun”, at 12pm on Wednesday 12/3 in AVW 1146. Read more ›

J. J. Wathen Defends Ph.D. Thesis

Congratulations to J. J. Wathen, who successfully defended his Ph.D. Thesis this morning, entitled “Characterization of Nonlinear Waveguides for All-Optical Signal Processing”.

Graphene-based THz Detector offers Unprecedented Speed, Bandwidth and Sensitivity

Our research, published this week in Nature Nanotechnology, describes a new type of graphene-based detector that overcomes some of the limitations of conventional THz technology.  The device exploits the very unique optical and thermal properties of graphene to achieve a noise-equivalent power that rivals the best available THz detectors, and a speed that far exceeds that of bolometers and pyroelectric detectors.   Even more remarkable is that the spectral responsivity spans an unprecedented range of frequencies, from near-infrared down to terahertz.

X. Cai, A. B. Sushkov, R. J. Suess, M. M. Jadidi, G. S. Jenkins, L. O. Nyakiti, R. L. Myers-Ward, S. Li, J. Yan, D. K. Gaskill, T. E. Murphy, H. D. Drew and M. S. Fuhrer, “Sensitive room-temperature terahertz detection via the photothermoelectric effect in graphene”, Nature Nanotechnology (2014)
doi:  10.1038/nnano.2014.182

Martin Mittendorff to join laboratory in September

We are very pleased to announce that Martin Mittendorff will be joining the group in September 2014 as a postdoctoral research associate.  Martin is currently finishing his Ph.D. thesis under the direction of Prof. Manfred Helm at Technical University Dresden and Dr. Stephan Winnerl at Helmholtz-Zentrum Dresden-Rossendorf.  Martin’s research includes ultrafast characterization of graphene and graphene devices, and terahertz photonics.

Newly published paper sheds light on symmetries and clusters in networks

Our latest research, appearing in Nature Communications, sheds light on the role of symmetries in the formation of clusters in networks.