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Optical secret sharing with cascaded metasurface holography
Philip Georgi, Qunshuo Wei, Basudeb Sain +4
Secret sharing is a well-established cryptographic primitive for storing highly sensitive information like encryption keys for encoded data. It describes the problem of splitting a…
Influence of plasmon resonances and symmetry effects on second harmonic generation in WS2-plasmonic hybrid metasurfaces
Florian Spreyer, Claudia Ruppert, Philip Georgi +1
The nonlinear process of second harmonic generation (SHG) in monolayer (1L) transition metal dichalcogenides (TMD), like , strongly depends on the polarization state of the e…
Asymmetric parametric generation of images with nonlinear dielectric metasurfaces
Sergey Kruk, Lei Wang, Basudeb Sain +4
Subwavelength dielectric resonators assembled into metasurfaces have become a versatile tool for miniaturising optical components approaching the nanoscale. An important class of m…
Nonlinear imaging of nanoscale topological corner states
Sergey S. Kruk, Wenlong Gao, Duk-Yong Choi +3
Topological states of light represent counterintuitive optical modes localized at boundaries of finite-size optical structures that originate from the properties of the bulk. Being…
A nonlinear metasurface combining telecom-range intersubband transitions in GaN/AlN quantum wells with resonant plasmonic antenna arrays
Jan Mundry, Florian Spreyer, Valentin Jmerik +3
We realize and investigate a nonlinear metasurface taking advantage of intersubband transitions in ultranarrow GaN/AlN multi-quantum well heterostructures. Owing to huge band offse…
Extremely low energy ARPES of quantum well states in cubic-GaN/AlN and GaAs/GaAlAs heterostructures
Mahdi Hajlaoui, Stefano Ponzoni, Michael Deppe +6
Quantum well (QW) heterostructures have been extensively used for the realization of a wide range of optical and electronic devices. Exploiting their potential for further improvem…
Selective etching of (111)B-oriented -layers for epitaxial lift-off
Tobias Henksmeier, Martin Eppinger, Bernhard Reineke +3
GaAs-(111)-nanostructures exhibiting second harmonic generation are new building blocks in nonlinear optics. Such structures can be fabricated through epitaxial lift-off employing…
Electrically switchable metasurface for beam steering using PEDOT
Juliane Ratzsch, Julian Karst, Jinglin Fu +10
Switchable and active metasurfaces allow for the realization of beam steering, zoomable metalenses, or dynamic holography. To achieve this goal, one has to combine high-performance…
Nonlinear bicolor holography using plasmonic metasurfaces
Daniel Frese, Qunshuo Wei, Yongtian Wang +3
Nonlinear metasurface holography shows the great potential of metasurfaces to control the phase, amplitude, and polarization of light while simultaneously converting the frequency…