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Research

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Novel Photonic Materials and Fabrication

Shaping novel nanophotonic materials

Silicon Photonics

Enabling the next generation of computing systems

Nano-Electromagnetism

Manipulating waves at the nanoscale

Sensing and Optofluidics
Sensing and Optofluidics

Sensing and manipulating biological analytes

Optomechanics

Controlling the interaction between phonons and photons

Nonlinear Optics

Generating extreme nonlinearities in nanophotonic structures

Sensing and Optofluidics

Published papers (partial list)

We are working on developing an integrated on-chip biosensor for the detection of enzymes and bacteria using cavity-enhanced absorption spectroscopy. Present day methods of sensing bacteria rely on microbiological assays, which require day-long or more incubation periods, or PCRs, which are expensive. On-chip biosensors would enable low-cost detection of pathogens on much smaller timescales.

Light enhancement in optical microcavities is integrated with a microfluidic platform to produce optofluidic devices with increased the interaction of the cavity's evanescent field with the fluidic environment. The change in the transmission spectrum of the ring resonators, based on the change of absorption and not on the index of refraction, is used to quantify the concentration of biological materials within the channels.

Photograph of the optofluidic device with an integrated PDMS microchannel with ring resonators. A waveguide is highlighted in red and the microfluidic channel is in blue. Inset shows a zoomed in microscope image of an exposed silicon microring resonator with an oxide clad waveguide.

Photograph of optofluidic device mounted in test setup.

Experimentally measured transmission spectrum of a microring resonator (black line) with fluid analytes of increasing absorbance (left to right) showing the change in extinction ratio and linewidth as the resonator loss increases.


Recent News

Prof. Lipson ranked among top 1% of researchers for most cited papers in physics

Prof. Lipson ranked among top 1% of researchers for most cited papers in physics by Thomas Reuters.