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Sensing beyond the exceptional point for high detectivity
Zhichao Li ; Ciril S. Prasad ; Xielin Wang , et al. arXiv,2024,2403.10713. DOI: 10.48550/arXiv.2403.10713
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Abstract: Exceptional point (EP)-based optical sensors exhibit exceptional sensitivity but poor detectivity due to their acute sensitivity to perturbations such as noise. When the optical budget is limited as in applications on mobile platforms, high detectivity might be equally important as high sensitivity. In such scenarios, off-EP sensing is advantageous where a slight loss in sensitivity can lead to a significant gain in detectivity. Here, we show that a passive parity-time symmetric plasmonic-photonic hybrid shows a peak in its detectivity off EP where the sensitivity is still very high-surpassing the sensitivities of equivalent fully-plasmonic and fully-photonic systems. We demonstrate the high detectivity of off-EP sensing of anti-mouse IgG protein using this plasmonic-photonic hybrid system. We report a sensitivity of 1.2 nm/nM while requiring a minimum optical budget of 1.3 nJ. Thus, non-Hermitian plasmonic-photonic hybrids could be the best class of nanophotonic sensors for real-world applications.
Purchased from AmBeed: 764-89-6
CAS No. : | 764-89-6 | MDL No. : | MFCD00792446 |
Formula : | C8H16O3 | Boiling Point : | - |
Linear Structure Formula : | - | InChI Key : | KDMSVYIHKLZKET-UHFFFAOYSA-N |
M.W : | 160.21 | Pubchem ID : | 69820 |
Synonyms : |
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Signal Word: | Warning | Class: | N/A |
Precautionary Statements: | P264-P280-P302+P352-P337+P313-P305+P351+P338-P362+P364-P332+P313 | UN#: | N/A |
Hazard Statements: | H315-H319 | Packing Group: | N/A |
GHS Pictogram: |