ArticleFrontiers of optoelectronics2021
PTX-symmetric metasurfaces for sensing applications.
Article in Frontiers of optoelectronics, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 4 papers.
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4 citing papers in PubMed.
- High Q-Factor, High Contrast, and Multi-Band Optical Sensor Based on Plasmonic Square Bracket Dimer Metasurface.Nanomaterials (Basel, Switzerland) · 2024Article
- Multimodal Wireless Wound Sensors via Higher-Order Parity-Time Symmetry.IEEE sensors journal · 2024Article
- Electromagnetically unclonable functions generated by non-Hermitian absorber-emitter.Science advances · 2023Article
- Preface to the special issue on "Recent Advances in Optical Metasurfaces".Frontiers of optoelectronics · 2021Article
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4 authors.
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Abstract
In this paper, we introduce an ultra-sensitive optical sensing platform based on the parity-time-reciprocal scaling (PTX)-symmetric non-Hermitian metasurfaces, which leverage exotic singularities, such as the exceptional point (EP) and the coherent perfect absorber-laser (CPAL) point, to significantly enhance the sensitivity and detectability of photonic sensors. We theoretically studied scattering properties and physical limitations of the PTX-symmetric metasurface sensing systems with an asymmetric, unbalanced gain-loss profile. The PTX-symmetric metasurfaces can exhibit similar scattering properties as their PT-symmetric counterparts at singular points, while achieving a higher sensitivity and a larger modulation depth, possible with the reciprocal-scaling factor (i.e., X transformation). Specifically, with the optimal reciprocal-scaling factor or near-zero phase offset, the proposed PTX-symmetric metasurface sensors operating around the EP or CPAL point may achieve an over 100 dB modulation depth, thus paving a promising route toward the detection of small-scale perturbations caused by, for example, molecular, gaseous, and biochemical surface adsorbates.
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