Trapping Light: A Brief Overview of Silicon Micro Ring Optical Biosensors
<p>The practical use of resonant optical cavities dates back to the Fabry-Perot Interferometer, devised by <a href="https://en.wikipedia.org/wiki/Charles_Fabry" rel="noopener ugc nofollow" target="_blank">Charles Fabry</a> and <a href="https://en.wikipedia.org/wiki/Alfred_Perot" rel="noopener ugc nofollow" target="_blank">Alfred Perot</a>, which is a fairly simple, but nevertheless ingenious, arrangement of two semi-transparent mirrors. See below for a great demonstration video from MIT, complete with a proper analog demo:</p>
<p><iframe frameborder="0" height="480" scrolling="no" src="https://cdn.embedly.com/widgets/media.html?src=https%3A%2F%2Fwww.youtube.com%2Fembed%2FcpIVTXNC2s8%3Ffeature%3Doembed&display_name=YouTube&url=https%3A%2F%2Fwww.youtube.com%2Fwatch%3Fv%3DcpIVTXNC2s8&image=https%3A%2F%2Fi.ytimg.com%2Fvi%2FcpIVTXNC2s8%2Fhqdefault.jpg&key=a19fcc184b9711e1b4764040d3dc5c07&type=text%2Fhtml&schema=youtube" title="Optics: Plane mirror cavity - collimated beams | MIT Video Demonstrations in Lasers and Optics" width="640"></iframe></p>
<p>Today we have extremely large interferometers like LIGO, the gravitational wave detector, and microscale interferometers that can be fabricated in the thousands on a chip the size of the head of a pin.</p>
<p><a href="https://medium.com/siphox-blog/trapping-light-a-brief-overview-of-silicon-micro-ring-optical-biosensors-4f05befd0711"><strong>Click Here</strong></a></p>