Nowadays, a great deal of effort is put towards the realization of a whole new class of display technologies offering a more immersive experience for the user. These range from near-eye devices offering virtual or augmented reality (VR/AR) experiences to those aimed to produce true three-dimensional holographic displays. This new-class of devices requires a thorough dynamic control over the light waves and are usually based on spatial light modulator (SLM) technologies. Current SLMs, however, are far from offering the resolution and pixel sizes needed to provide truly satisfying user experiences.
The main goal of this program is to develop a new class of spatial light modulators with sub-wavelength resolution. They will be based on the concept of optical nanoantennas and operate both in the visible and IR spectral ranges to boost the resolution of these devices. Nanoantennas are resonant elements with sub-wavelength dimensions that may abruptly change the phase, amplitude and/or polarization of an incoming wave at very small scales due to the resonant excitation of their electromagnetic modes.
We mainly explore dielectric nanoantennas, for which a rich wealth of optical modes can be excited, allowing unprecedented control of light scattering, and for which dissipative losses can be almost completely avoided (see our recent review in Science, 2016).
While several static devices based on these nanoantennas have already been demonstrated, some showing remarkable efficiencies (see, e.g., our recent papers in Laser & Photonics Reviews, 2015 and Nano Letters, 2017) or exciting new functionalities (Nature Communications, 2016), the challenge to actively and dynamically control them remains open.
The research combines different expertise ranging from nanophotonics to semiconductor physics. We are exploring several paths towards individual control of these devices, with the ultimate goal of producing disrupting technologies that may open new opportunities for next-gen spatial light modulators, which may find applications in holographic displays and novel AR/VR devices.
See our recent Highlights and Publications here.