Physicists at Harvard University in the US have built a silicon waveguide that exhibits a refractive index of, or close to, zero when operating at near-infrared telecom wavelengths. The waveguide can ...

Please provide your email address to receive an email when new articles are posted on . These military databases that were carefully put together had great follow-up and large numbers, no bias to ...

There are different ways to investigate refraction in rectangular blocks. In this required practical activity, it is important to: make, measure and record the angles of incidence accurately using a ...

Recent advances have brought negative index materials and their fascinating properties from their theoretical origins into the domain of experimental physics and device engineering. A wave with the ...

The negative refraction of electrons in graphene has been seen for the first time in experiments done by physicists in the US. The work represents an important advance in the fabrication of graphene ...