High detectivity terahertz radiation sensing using frequency-noise-optimized nanomechanical resonators
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arXiv
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| Autori principali: | , , , , , , , , |
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| Natura: | Preprint |
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2024
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| author | Zhang, Chang Yalavarthi, Eeswar K. Giroux, Mathieu Cui, Wei Stephan, Michel Maleki, Ali Weck, Arnaud Ménard, Jean-Michel St-Gelais, Raphael |
| author_facet | Zhang, Chang Yalavarthi, Eeswar K. Giroux, Mathieu Cui, Wei Stephan, Michel Maleki, Ali Weck, Arnaud Ménard, Jean-Michel St-Gelais, Raphael |
| contents | We achieve high detectivity terahertz sensing using a silicon nitride nanomechanical resonator functionalized with a metasurface absorber. High performances are achieved by striking a fine balance between the frequency stability of the resonator, and its responsivity to absorbed radiation. Using this approach, we demonstrate a detectivity $D^*=3.4\times10^9~\mathrm{cm\cdot\sqrt{Hz}/W}$ and a noise equivalent power $\mathrm{NEP}=36~\mathrm{pW/\sqrt{Hz}}$ that outperform the best room-temperature on-chip THz detectors (i.e., pyroelectrics). Our optical absorber consists of a 1-mm diameter metasurface, which currently enables a 0.5-3 THz detection range but can easily be scaled to other frequencies in the THz and infrared ranges. In addition to demonstrating high-performance terahertz sensing, our work unveils an important fundamental trade-off between high frequency stability and high responsivity in thermal-based nanomechanical radiation sensors. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2401_16503 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | High detectivity terahertz radiation sensing using frequency-noise-optimized nanomechanical resonators Zhang, Chang Yalavarthi, Eeswar K. Giroux, Mathieu Cui, Wei Stephan, Michel Maleki, Ali Weck, Arnaud Ménard, Jean-Michel St-Gelais, Raphael Optics Applied Physics We achieve high detectivity terahertz sensing using a silicon nitride nanomechanical resonator functionalized with a metasurface absorber. High performances are achieved by striking a fine balance between the frequency stability of the resonator, and its responsivity to absorbed radiation. Using this approach, we demonstrate a detectivity $D^*=3.4\times10^9~\mathrm{cm\cdot\sqrt{Hz}/W}$ and a noise equivalent power $\mathrm{NEP}=36~\mathrm{pW/\sqrt{Hz}}$ that outperform the best room-temperature on-chip THz detectors (i.e., pyroelectrics). Our optical absorber consists of a 1-mm diameter metasurface, which currently enables a 0.5-3 THz detection range but can easily be scaled to other frequencies in the THz and infrared ranges. In addition to demonstrating high-performance terahertz sensing, our work unveils an important fundamental trade-off between high frequency stability and high responsivity in thermal-based nanomechanical radiation sensors. |
| title | High detectivity terahertz radiation sensing using frequency-noise-optimized nanomechanical resonators |
| topic | Optics Applied Physics |
| url | https://arxiv.org/abs/2401.16503 |