Presentations

    The interaction of infrared radiation with isolated molecules: intramolecular nonequilibrium, at Lasers ¹86 Conference (Orlando, FL), Saturday, November 1, 1986
    Anti-Stokes signals from various modes of isolated, infrared multiple photon excited molecules are measured to determine the intramolecular distribution of vibrational energy. This paper presents results for CF2HCl, CF2Cl2, SF6 and 1,1-C2H4F2. All but CF2HCl exhibit collisionless changes in Raman spectrum after infrared multiphoton excitation. This shows that the excitation modifies the population of these modes. Even though the symmetric SF6 molecule reaches an intramolecular equilibrium within the 20 ns time resolution of the experiment, the other molecules exhibit a distinct nonequilibrium... Read more about The interaction of infrared radiation with isolated molecules: intramolecular nonequilibrium
    Scientific elite or outcast?, at White House Forum "Making it happen: First in the World", Office of Science and Technology Policy, White House (Washington, DC), Wednesday, July 26, 1995
    Scientific elite or outcast?, at Hearing on Disciplinary Perspectives of National Leaders in Undergraduate Education, National Science Foundation (Arlington, VA), Monday, October 23, 1995
    Scientific elite or outcast?, at White House Forum "Making it happen: First in the World", Office of Science and Technology Policy, White House (Washington, DC), Wednesday, July 26, 1995
    Scientific elite or outcast?, at Hearing on Disciplinary Perspectives of National Leaders in Undergraduate Education, National Science Foundation (Arlington, VA), Monday, October 23, 1995
    Educational Activities, at DEAS Industrial Outreach Workshop, Harvard University (Cambridge, MA), Thursday, April 10, 2003:
    The Center actively promotes interdisciplinary education and outreach through a variety of initiatives. Participants contribute to outreach to the general public through collaboration with the Boston Museum of Science, outreach to K-12 in-service teachers, research experiences for undergraduates and K-12 teachers, interdisciplinary courses for graduate students, and postdoctoral fellowships for women and minorities. The program involves faculty, postdoctoral fellows, collaborators and graduate students associated with the Center and benefits a broad constituency of society.
    Less is More: Extreme Optics with Zero Refractive Index, at Photonics West 2016, Integrated Optics: Devices, Materials, and Technologies XX (San Francisco, CA), Monday, February 15, 2016:
    Nanotechnology has enabled the development of nanostructured composite materials (metamaterials) with exotic optical properties not found in nature. In the most extreme case, we can create materials which support light waves that propagate with infinite phase velocity, corresponding to a refractive index of zero. This zero index can only be achieved by simultaneously controlling the electric and magnetic resonances of the nanostructure. We present an in-plane metamaterial design consisting of silicon pillar arrays, embedded within a polymer matrix and sandwiched between gold layers. Using an... Read more about Less is More: Extreme Optics with Zero Refractive Index
    On-chip zero index metamaterials, at Advanced Laser Applications Workshop, Korea Institue of Machinery and Materials (Daejeon, South Korea), Friday, August 28, 2015:
    Impedance-matched metamaterials with zero refractive index can be achieved by exploiting a Dirac cone at the center of the Brillouin zone. We present an in-plane Dirac-cone metamaterial consisting of low-aspect-ratio silicon pillar arrays in an SU-8 matrix with top and bottom gold layers. Using an integrated nano-scale prism constructed of the proposed material, we demonstrate unambiguously a zero refractive index in the optical regime. This design serves as a novel on-chip platform in the optical regime to explore the exotic physics of Dirac-cone metamaterials and to implement applications... Read more about On-chip zero index metamaterials

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