Joel Achenbach reports on science and health for the National desk. He has been a staff writer for The Post since 1990. Email: [email protected] ...

A new method of minimizing sidelobes of a large array whose element spacing is much larger than the wavelength has been developed. The analytical expression for the first derivative of the array beam ...

We report that two-dimensional (2D) sub-diffraction-limited images can be theoretically reconstructed by a new metamaterial far-field superlens. The metamaterial far-field superlens, composed of a ...