The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
We demonstrate that the signal-to-noise ratio and signal collection efficiency in evanescent waveguide-based Raman spectroscopy exceeds that in Raman microscopes. We investigate the effect of silicon-nitride waveguide geometry to further improve the performance.
We investigate the membranes of cells fixed on a photonic chip using evanescent excitation and collection of Raman signals using single-mode nano-photonic waveguides. Enhancement and selectivity of the evanescent interaction allow for selectively probing the membrane with higher efficiency than confocal microscopes.
We review possible implementations of coherent anti-Stokes Raman scattering using nanophotonic waveguide circuits. Enhancement mechanisms and limitations are discussed.
We investigate the effect of waveguide geometry on the conversion efficiency of Raman signals collected by integrated photonic waveguides. Compared to strip-type photonic wires, we report a six-fold increase in conversion efficiency for silicon-nitride slot-waveguides.
We compare the performance of the nano-photonic waveguide based evanescent Raman sensors and a typical the confocal microscope. For 1 cm long strip silicon nitride waveguides, we theoretically expect more than 500 times higher signal compared to the confocal microscopic systems. The results of our preliminary measurements indicate at least 50 times higher signal. For slotted waveguides, the preliminary...
Lab-on-chip approaches, based on CMOS-compatible silicon nitride photonic waveguides, may have a large potential for Raman spectroscopy. The role of various resonant mechanisms to enhance the Raman signal is discussed.
We report on the development of low-loss photonic components fabricated in low-temperature PECVD SiN for the development of a CMOS compatible biophotonics platform. We discuss modeling and experimental demonstration of strip waveguides, MMI and evanescent couplers, fractal trees for power distribution and AWGs and waveguide-integrated resonators as wavelength selective components.
We theoretically study coupling of dipole radiation into integrated Si3N4 strip waveguides functionalized with a nanoplasmonic antenna. This structure enables efficient coupling of enhanced Raman signals into the fundamental TE-mode of the waveguide.
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.