Chip-based sensors with incredible sensitivity

Source:

Penn State

 

Summary:

In London's St. Paul's Cathedral, a whisper can be heard far across the circular whispering gallery as the sound curves around the walls. Now, an optical whispering gallery mode resonator can spin light around the circumference of a tiny sphere millions of times, creating an ultrasensitive microchip-based sensor for multiple applications. 

 

See entire article at Source Link:  

https://www.sciencedaily.com/releases/2017/11/171102121005.htm