Sensitivity enhancement of terahertz microfluidic chip using natural evolutional resonance in a few arrays of meta-atoms

Kazunori Serita; Masayoshi Tonouchi

doi:10.1117/12.2657052

15 March 2023 Sensitivity enhancement of terahertz microfluidic chip using natural evolutional resonance in a few arrays of meta-atoms

Kazunori Serita, Masayoshi Tonouchi

Author Affiliations +

Proceedings Volume 12430, Quantum Sensing and Nano Electronics and Photonics XIX; 124300L (2023) https://doi.org/10.1117/12.2657052
Event: SPIE OPTO, 2023, San Francisco, California, United States

Abstract

We propose a nonlinear optical crystal-based compact terahertz (THz) - microfluidic chip with a few arrays of metaatoms for the ultra-trace sensing of solutions. We design the meta-atom array to induce natural evolutional resonance with a point THz source. The point THz source is locally generated by optical rectification at the irradiation spot of a femtosecond pulse laser beam in the single meta-atom, which induces a tightly electric field confinement mode. The generated THz waves resonate with surrounding meta-atoms in the time domain. We employed various types of metaatom structures and were able to detect minute changes in the concentration of trace amounts of ethanol and glucose water solutions by monitoring the shift in the resonance frequencies. This technique contributes compactification of the THzmicrofluidic chip with high sensitivity and accelerates the developments of future microfluidics integrated with THz technology, such as lab-on-a-chip devices and THz micro total analysis systems.

Conference Presentation

Citation Download Citation

Kazunori Serita and Masayoshi Tonouchi "Sensitivity enhancement of terahertz microfluidic chip using natural evolutional resonance in a few arrays of meta-atoms", Proc. SPIE 12430, Quantum Sensing and Nano Electronics and Photonics XIX, 124300L (15 March 2023); https://doi.org/10.1117/12.2657052

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