Optical Sensors

About

Drawbacks Microresonators are micrometre-scale structures for confining light and can provide the optical feedback required in semiconductor lasers. Optical resonance occurs when light waves confined by total internal reflection in a closed loop dielectric microstructure are reflected back on the same optical path where they build up in intensity over multiple round trips due to constructive interference. A shift in the optical resonance frequency due to change in surrounding conditions like temperature and pressure, etc., or particle absorption are used for different types of measurement. Microstructures that generate optical resonances and exploit their properties for various applications have typically been confined to the geometric shapes of the sphere, cylinder, disk or curved waveguide. One of the drawbacks of spherical microresonator is the short interaction length and a tight submicrometer gap required between the curved resonator sidewalls and the straight waveguides which may introduce challenges for evanescent coupling. Applications The present technology can create a new genre of microresonators of various shapes. Improve the accuracy and precision of the microresonator that has a potential to detect single particle like a virus. The current technology has the potential to revolutionize the entire spectrum of applications for optics based sensors such as: measuring/detecting temperature, pressure, velocity, rotation, acceleration, vibration, linear and angular positions, strain, humidity, viscosity, chemical changes, electromagnetism and myriad of biomedical applications.