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Development of an Ultra-fast Optical Spectroscopy System for Multi-disciplinary Studies Kenneth J. Rothschild, Trustees of Boston University, DMR 0821450.

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  1. Development of an Ultra-fast Optical Spectroscopy System for Multi-disciplinary Studies Kenneth J. Rothschild, Trustees of Boston University, DMR 0821450 • This is the first year of a 3-year project in the Photonics Center at Boston University to develop a broad spectral range, ultra-low noise, ultrafast optical spectroscopy instrument for multidisciplinary research. The instrument will incorporate many innovations that will open up a new window for understanding a variety of fundamental processes in biology, chemistry, and materials science.   • Accomplishments to date include: • Ti:sapphire oscillator and regenerative amplifier system operational. • UV-Vis-NIR Optical Parametric amplifier system operational with wavelength tuning range extending out to the 2 micron range. • Mid-IR Optical Parametric amplifier system i operational, typically generating > 15 mJ at 2220 cm-1 with ~ 100 fs pulse-width. • Novel THz spectrometer under development.  • New collaborations facilitated in biomolecular studies, nanoplasmonics, metamaterials and complex chemical systems. 35 fs Excite Δt Probe

  2. Development of an Ultra-fast Optical Spectroscopy System for Multi-disciplinary Studies Kenneth J. Rothschild, Trustees of Boston University, DMR 0821450 The promise of ultrafast optical spectroscopy in condensed matter physics, chemistry, biology, materials science, and engineering stems from its ability to temporally resolve phenomena at the fundamental sub-picosecond timescales of nuclear and electronic motion. This NSF-MRI instrument development project is facilitating basic studies in a variety of disciplines. Examples include (see Figures clockwise from top left): Signal and energy transduction in rhodopsins, Nanoplasmonic structures (with H. Altug, BU), Molecular basis of anesthetic in biological membranes, and 3D Lithographic fabrication (Peter So, MIT). As part of our outreach effort we are conducting tours and involving REU students in the instrument development. For more information on research at the Femtospec Laboratory and NSF-MRI Facility go to http://physics.bu.edu/femtospec/

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