Mechanical metamaterials, also known as architected materials, are rationally designed
composites, aiming at elastic behaviors and effective mechanical properties beyond ('meta') …

Usually, an unfocused light beam, such as a paraxial Gaussian beam, can exert a force on
an object along the direction of light propagation, which is known as light pressure …

Optical manipulations utilizing the mechanical effect of light have been indispensable in
various disciplines. Among those various manipulations, optical pulling has emerged …

We report an ingenious mechanism to obtain robust optical pulling force by a single plane
wave via engineering the topology of light momentum in the background. The underlying …

Progress in light scattering engineering made it feasible to develop optical tweezers
allowing capture, hold, and controllable displacement of submicrometer-size particles and …

With consideration of parity-time (PT) symmetry, Lorentz reciprocity theorem, and real Bloch
phase, we propose a generalized parametric space for any PT-symmetric unit cells that can …

Polarization of photonic beams makes a continuous information carrier and thus modifying it
dramatically within a short distance is desirable for numerous optical devices. The easiest …

In this Letter, we propose a tunable coherent perfect absorber based on ultrathin nonlinear
metasurfaces. A nonlinear metasurface is made of plasmonic nanoantennas coupled to an …

Optical pulling provides a new degree of freedom in optical manipulation. It is generally
believed that long-range optical pulling forces cannot be generated by the gradient of the …

PT symmetry is a unique platform for light manipulation and versatile use in unidirectional
invisibility, lasing, sensing, etc. Broken and unbroken PT-symmetric states in non-Hermitian …