T
Thomas Zentgraf
Researcher at University of Paderborn
Publications - 225
Citations - 23519
Thomas Zentgraf is an academic researcher from University of Paderborn. The author has contributed to research in topics: Plasmon & Metamaterial. The author has an hindex of 54, co-authored 209 publications receiving 19541 citations. Previous affiliations of Thomas Zentgraf include KAIST & University of Stuttgart.
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Journal ArticleDOI
A graphene-based broadband optical modulator
Ming Liu,Xiaobo Yin,Erick Ulin-Avila,Baisong Geng,Thomas Zentgraf,Long Ju,Feng Wang,Feng Wang,Xiang Zhang,Xiang Zhang +9 more
TL;DR: Graphene-based optical modulation mechanism, with combined advantages of compact footprint, low operation voltage and ultrafast modulation speed across a broad range of wavelengths, can enable novel architectures for on-chip optical communications.
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Metasurface holograms reaching 80% efficiency
TL;DR: The design of the hologram integrates a ground metal plane with a geometric metasurface that enhances the conversion efficiency between the two circular polarization states, leading to high diffraction efficiency without complicating the fabrication process.
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Three-dimensional optical metamaterial with a negative refractive index
Jason Valentine,Shuang Zhang,Thomas Zentgraf,Erick Ulin-Avila,Dentcho A. Genov,Guy Bartal,Xiang Zhang,Xiang Zhang +7 more
TL;DR: Bulk optical metamaterials open up prospects for studies of 3D optical effects and applications associated with NIMs and zero-index materials such as reversed Doppler effect, superlenses, optical tunnelling devices, compact resonators and highly directional sources.
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An optical cloak made of dielectrics
TL;DR: The optical 'carpet' cloak is designed using quasi-conformal mapping to conceal an object that is placed under a curved reflecting surface by imitating the reflection of a flat surface and enables broadband and low-loss invisibility at a wavelength range of 1,400-1,800 nm.
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Three-dimensional optical holography using a plasmonic metasurface
Lingling Huang,Lingling Huang,Xianzhong Chen,Holger Mühlenbernd,Hao Zhang,Shumei Chen,Shumei Chen,Benfeng Bai,Qiaofeng Tan,Guofan Jin,Kok Wai Cheah,Cheng-Wei Qiu,Jensen Li,Thomas Zentgraf,Shuang Zhang +14 more
TL;DR: Huang et al. as mentioned in this paper developed ultrathin plasmonic metasurfaces to provide 3D optical holographic image reconstruction in the visible and near-infrared regions for circularly polarized light.