Researchers at MIT say they have discovered a new way to trap light. Rather than use mirrors or photonic crystals, the MIT approach uses waves with the same wavelength, but exactly with opposite ...

Interference can arise with one source of waves where the waves travel different distances before meeting. The difference in the distance travelled (the path difference) must be a full number of ...

Several light sources produce light across various wavelengths. While this wavelength spectrum can be useful in lighting applications, other applications require light with a restricted visible ...