[MOS] May 7, 2013

[Luis H Galindo]

Modern Optics and Spectroscopy

 Metamaterials, NanoPlasmonics, and Nanofluidics for Ultrasensitive Spectroscopy and Bio-detection.

 

Hatice Altug, Ph.D.

Boston University

 

Tuesday, May 7, 2013 

12:00 – 1:00 p.m.

Plasmonics, by localizing light to the sub-wavelength volumes and dramatically enhancing local fields, is enabling myriad of exciting opportunities for construction of novel photonic devices and systems. In this talk, Dr. Altug will present her research team’s recent work on integrated plasmonics and metamaterials and their applications.Dr. Altug will first introduce an ultrasensitive infrared nanospectroscopy technique. Infrared spectroscopy, which directly accesses vibrational fingerprints of the biomolecular/chemicals in mid-IR frequencies, is a powerful identification and analysis tool. Its low sensitivity, however, limits the wide applicability of the technique. By engineering on-chip nano-antenna arrays, she will demonstrate that infrared plasmonics can enable to measure vibrational signatures and activity of low quantities of molecules. This method, by enhancing the signals from proteins by more than 100,000 times, overcomes the fundamental Beer-Lambert law and opens up a new paradigm in vibrational spectroscopy. For bio-sensors operating at low analyte concentrations, relying only on diffusion to transport analytes to the device surface severely limits the sensor performance. Next, Dr. Altug will show that by uniquely merging nanophotonics and nanofluidics on the same platform, one can address this use and dramatically improve sensor response times. She will also show that sub-wavelength optofluidic sensors can sensitively and reliably detect live and intact viruses in biological media at medically relevant concentrations. Dr. Altug will then introduce a new nanofabrication method enabling high-throughput, large area and low-cost fabrication of nanophotonic devices and metamaterials. She will also show that this method can enable high-resolution nanoplasmonis on flexible, stretchable and non-planar surfaces. Finally, she will discuss novel metamaterials that are engineered to support unique spectral responses for enhanced optical non-linearities.


  

Grier Room, MIT Bldg 34-401

Refreshments served after the lecture

 


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