Nonlinear Mid?Infrared Metasurface based on a Phase?Change Material

Ultrathin gradient nonlinear metasurface with a giant nonlinear response

NISHANT NOOKALA, JONGWON LEE, MYKHAILO TYMCHENKO, J. SEBASTIAN GOMEZ-DIAZ, FREDERIC DEMMERLE, GERHARD BOEHM, KUEIFU LAI, GENNADY SHVETS, MARKUS-CHRISTIAN AMANN, ANDREA ALU,* AND MIKHAIL BELKIN Department of Electrical and Computer Engineering, The University of Texas at Austin, Austin, Texas 78712, USA School of Electrical and Computer Engineering, Ulsan National Institute of Science and Techno...

Spin and wavelength multiplexed nonlinear metasurface holography

Metasurfaces, as the ultrathin version of metamaterials, have caught growing attention due to their superior capability in controlling the phase, amplitude and polarization states of light. Among various types of metasurfaces, geometric metasurface that encodes a geometric or Pancharatnam-Berry phase into the orientation angle of the constituent meta-atoms has shown great potential in controlli...

Midinfrared optical parametric oscillator based on the wide-bandgap BaGa4S7 nonlinear crystal.

The orthorhombic biaxial crystal BaGa(4)S(7) has been employed in a 1064 nm pumped optical parametric oscillator generating <6 ns long idler pulses with energies as high as 0.5 mJ at 6.217 μm and average power of ~50 mW at 100 Hz. Notwithstanding the relatively low nonlinearity, ~3 times above threshold operation has been achieved at pump intensities more than 5 times below the crystal surface ...

Dynamic metasurface lens based on MEMS technology

Nonlinear Metasurface Based on Giant Optical Kerr Response of Gold Quantum Wells

A nonlinear metasurface is demonstrated numerically based on the recently developed quantum-sized gold film. The active functionality of the metasurface is realized by varying the incident optical power through the ultrahigh Kerr nonlinearity of the quantum-sized gold films. In the low power region, the device acts as a normal reflecting surface, while it becomes a phase grating with most energ...