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An on-chip optical lens, which can launch expanded and well-collimated Gaussian beams in planar free space with control over propagation angles has been designed, fabricated, and characterized. The results agree well with simulations, maintaining a beam width between 26- and 28-\(\mu \) m beam width even after 750-\(\mu \) m propagation in free space on a silicon chip. Changing the position of the...
A novel Silicon-on-insulator (SOI) integrated optic waveguide configuration is investigated as a platform for sensing. Our thin-ridge SOI waveguide structures exhibit lateral leakage and utilise strong evanescence to sense the presence of a biofilm.
Several important applications in integrated photonics such as sensors [1], on-chip optical microscopes [2], microwave channelizers [3], and even optical interconnects between chips [4] are implemented using planar ‘free-space’ optics. These do require formation and reception of well collimated Gaussian beams in free space. The conventional way to launch the collimated beam is to use free space optical...
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