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| Main Authors: | , , , , , , , , , , , , , |
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| Format: | Preprint |
| Published: |
2024
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2401.10381 |
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| _version_ | 1866910741152399360 |
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| author | Peters, Luke Rocco, Davide Olivieri, Luana Leon, Unai Arregui Cecconi, Vittorio Carletti, Luca Gigli, Carlo Della Valle, Giuseppe Cutrona, Antonio Gongora, Juan Sebastian Totero Leo, Giuseppe Pasquazi, Alessia De Angelis, Costantino Peccianti, Marco |
| author_facet | Peters, Luke Rocco, Davide Olivieri, Luana Leon, Unai Arregui Cecconi, Vittorio Carletti, Luca Gigli, Carlo Della Valle, Giuseppe Cutrona, Antonio Gongora, Juan Sebastian Totero Leo, Giuseppe Pasquazi, Alessia De Angelis, Costantino Peccianti, Marco |
| contents | Metasurfaces represent a new frontier in materials science paving for unprecedented methods of controlling electromagnetic waves, with a range of applications spanning from sensing to imaging and communications. For pulsed terahertz generation, metasurfaces offer a gateway to tuneable thin emitters that can be utilised for large-area imaging, microscopy and spectroscopy. In literature THz-emitting metasurfaces generally exhibit high absorption, being based either on metals or on semiconductors excited in highly resonant regimes. Here we propose the use of a fully dielectric semiconductor exploiting morphology-mediated resonances and inherent quadratic nonlinear response. Our system exhibits a remarkable 40-fold efficiency enhancement compared to the unpatterned at the peak of the optimised wavelength range, demonstrating its potential as scalable emitter design. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2401_10381 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Resonant Fully dielectric metasurfaces for ultrafast Terahertz pulse generation Peters, Luke Rocco, Davide Olivieri, Luana Leon, Unai Arregui Cecconi, Vittorio Carletti, Luca Gigli, Carlo Della Valle, Giuseppe Cutrona, Antonio Gongora, Juan Sebastian Totero Leo, Giuseppe Pasquazi, Alessia De Angelis, Costantino Peccianti, Marco Optics Metasurfaces represent a new frontier in materials science paving for unprecedented methods of controlling electromagnetic waves, with a range of applications spanning from sensing to imaging and communications. For pulsed terahertz generation, metasurfaces offer a gateway to tuneable thin emitters that can be utilised for large-area imaging, microscopy and spectroscopy. In literature THz-emitting metasurfaces generally exhibit high absorption, being based either on metals or on semiconductors excited in highly resonant regimes. Here we propose the use of a fully dielectric semiconductor exploiting morphology-mediated resonances and inherent quadratic nonlinear response. Our system exhibits a remarkable 40-fold efficiency enhancement compared to the unpatterned at the peak of the optimised wavelength range, demonstrating its potential as scalable emitter design. |
| title | Resonant Fully dielectric metasurfaces for ultrafast Terahertz pulse generation |
| topic | Optics |
| url | https://arxiv.org/abs/2401.10381 |