Research Topics

intern

Development of photonic crystal cavities to probe biological solutions with nanoscale resolution

Research Area: Super-resolved microscopy enabled by silicon photonics

Main Researcher: Saurav Kumar

Planar photonic crystal cavities are unique optical resonators that can confine light in a sub-wavelength volume and produce at the same time sharp frequency resonances. As a result, a strong light-matter interaction can take place and significantly modify some physical observables. The integration of such cavities on a chip enables the implementation of a highly resolved and sensitive spectrometry.
The research topic is focusing on the design of photonic crystal cavities in view of characterizing biomolecules based on a new technique called dynamic resonant optical frequency shift spectroscopy. The target is to determine the size and shape of single proteins in complex colloidal solutions.

Other people involved:

Publications

International Journals

K. Saurav, N. Le Thomas, Probing the fundamental detection limit of photonic crystal cavities, Optica, 4(7), p.757-763 doi:10.1364/optica.4.000757 (2017) .
K. Saurav, S. Kumari, N. Le Thomas, CMOS Fabricated Large Array of Free Standing Substrate-Less Photonic Crystal Cavities for Biosensing Applications, IEEE Photonics Journal, 9(2), doi:10.1109/JPHOT.2017.2684627 (2017) .

International Conferences

N. Le Thomas, Fundamental sensing limits of integrated nanophotonic sensors, Latin America Optics & Photonics Conference (OSA - LAOP 2018) (invited), Peru, p.paper Tu2A.1 (2 pages) (2018)  .
N. Le Thomas, Fundamental thermodynamic noise in integrated photonic sensors, Norwegian PhD Network on Nanotechnology for Microsystems Workshop (invited), Norway, (2018)  .
K. Saurav, S. Kumari, N. Le Thomas, CMOS fabricated large array of free standing substrate-less photonic crystal cavities for biosensing applications, IEEE Photonics Conference (IPC), United States, p.493-501 doi:10.1109/ipcon.2017.8116198 (2017)  .
K. Saurav, N. Le Thomas, Impact of the light coupling on the sensing properties of photonic crystal cavity modes, SPIE Photonics West, United States, p.paper 10077OP doi:10.1117/12.2251199 (2017)  .
K. Saurav, N. Le Thomas, Imaging of photonic crystal cavity mode via refractive index sensing, Proceedings of the 21st Annual Symposium of the IEEE Photonics Benelux Chapter, Belgium, p.255-258 (2016)  .
K. Saurav, N. Le Thomas, Mapping nano-object induced perturbations of photonic crystal cavity modes, PECS-XII, United Kingdom, (2016).
K. Saurav, N. Le Thomas, Fabrication of substrate-less planar silicon photonic crystal cavities , Proceedings of the 20th Annual Symposium of the IEEE Photonics Benelux Chapter, (2015).
K. Saurav, N. Le Thomas, On-chip photonic crystal cavity designs for nanoparticle characterization , Taking Detection to the Limit: Biosensing with Optical Microcavities., Germany, (2014)  .
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