May 15, 2008, William Rhodes

Four Centuries of Imaging Technology, 1607 – 2007

OSA Eastman Speaker 

The history of the development of imaging technology combines important elements from scientific research, materials development, technology generally, and economic forces. All are examined in this talk, which describes important developments from the time of Galileo through the most recent developments in microscopy, television, and ultrasound imaging.

Read more: May 15, 2008, William Rhodes

Apr 17, 2008, Rick Plympton

Creating Corporate Advantage

In recent years, there have been many claims and programs that offer the promise of corporate advantage. But I believe that it all comes back to Corporate Culture. Your culture yields the results your management has put into motion. If you want to change the outcome, then strategically craft your culture to yield the desired results.

I’ll offer some experiences and lessons learned about crafting the corporate culture at Optimax, especially developing the culture while growing the workforce. This will be followed by a few examples of creative rewards and innovation in support of the corporate mission to make optics faster, cheaper and higher precision than we did yesterday. These technologies apply to aspheric optics as well as conventional spherical and plano optical components.

Read more: Apr 17, 2008, Rick Plympton

Mar 20, 2008, Giuliano Scarcelli

Brillouin Confocal Microscopy

The mechanical properties of biological tissues and biomaterials are closely related to their functional abilities; thus, measuring such mechanical properties non-invasively, in vivo, with micron-scale resolution, would have a wide range of biomedical applications.  We are exploring an all-optical approach to this problem based on Brillouin light scattering.  In Brillouin scattering, the interaction between incident photons and acoustic phonons inside a material leads to a tiny frequency shift in the scattered light.  To measure such frequency shift, we have developed a high-resolution optical spectrometer with unprecedented detection efficiency.  In addition, we have integrated the spectrometer with a home-built confocal microscope to allow the formation of images that use elastic properties as contrast mechanism.

Read more: Mar 20, 2008, Giuliano Scarcelli

Feb 21, 2008, Hatice Altug

Nanophotonic devices for communication and sensing

Photonic crystal nanostructures open unprecedented opportunities for construction of novel photonic devices and integrated nanophotonic systems, due to their unique capability to manipulate light at sub-wavelength scales. In this talk, I will present my work on photonic crystals and their applications. I will show ultra-fast photonic crystal nanocavity lasers that can be modulated at speeds far exceeding today's state of the art semiconductor lasers. The ultra-fast speeds are due to the use of cavity quantum electrodynamics effects such as spontaneous emission rate enhancement. I will then introduce two dimensional coupled photonic crystal nanocavity arrays and show that they can reduce the group velocity of light by many orders of magnitude. In addition, I will show the implementation of these structures in active media composed of multiple quantum wells for low threshold and high power nano-lasers. These coherently coupled nanocavity lasers achieve dramatically higher power conversion efficiency with respect to other nanocavity lasers. Finally, I will present photonic crystal nanocavity sensors and discuss their integration with microfluidic systems for sensitive detection.

Read more: Feb 21, 2008, Hatice Altug

Jan 17, 2008, Mike Butler

A Spectroscopy Tale

 Just as holograms and diffractive optical elements are designed to take a monochromatic beam of light and create spatial patterns, in the early 1990s I started looking for a way to take a beam of polychromatic light and produce spectral patterns.  Creating synthetic molecular spectra lead to a DARPA program to use correlation spectroscopy for remote chemical sensing.  For this program MEMs programmable micro-diffraction gratings were used to make the spectrometer flexible.  The participants were so excited about this technology that we made the big jump and started Polychromix.  I will describe the technical path from this development in basic science to a novel spectrometer produce, the PHAZIR, a hand-held materials analyzer.

Read more: Jan 17, 2008, Mike Butler

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