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Shi WN, Wang YM, Fan F, Liu JY, Cheng JR, Wang XH, Chang SJ. THz enantiomers of drugs recognized by the polarization enhancement of gold nanoparticles on an asymmetric metasurface. NANOSCALE 2023; 15:14146-14154. [PMID: 37591823 DOI: 10.1039/d3nr01826a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/19/2023]
Abstract
Chirality plays an important role in biological processes, and enantiomers often possess similar physical properties and different physiological functions. Thus, chiral detection of enantiomers has become a hot topic in recent years, and methods to enhance chiral molecular recognition are in urgent demand. In this work, a polarization detection method was used for different chiral drugs based on a specially designed metasurface composed of asymmetric double-opened rings and the surface enhancement effect of gold nanoparticles (GNPs). The experiment results show that the frequency shifts caused by the nearfield interaction of the metasurface and biomolecules have been significantly improved by GNPs, and both the limit of detection and detection precision of the metasurface can reach the 10-5 g ml-1 level. Moreover, the polarization sensing characterized by right circular polarization (RCP), the polarization elliptical angle (PEA), and the polarization rotation angle (PRA) shows that the enantiomers of three drugs can be distinguished, especially using the PEA spectrum; the maximum difference between enantiomers is over 30° with a precision of 6.6 × 10-7 g mL-1. Our THz polarization sensing and the GNP enhancement method inspire an efficient strategy for the highly sensitive detection of enantiomers.
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Affiliation(s)
- Wei-Nan Shi
- Institute of Modern Optics, Nankai University, Tianjin Key Laboratory of Micro-scale Optical Information Science and Technology, Tianjin 300350, China.
| | - Yi-Ming Wang
- Institute of Modern Optics, Nankai University, Tianjin Key Laboratory of Micro-scale Optical Information Science and Technology, Tianjin 300350, China.
| | - Fei Fan
- Institute of Modern Optics, Nankai University, Tianjin Key Laboratory of Micro-scale Optical Information Science and Technology, Tianjin 300350, China.
- Tianjin Key Laboratory of Optoelectronic Sensor and Sensing Network Technology, Tianjin 300350, China
| | - Jia-Yue Liu
- Institute of Modern Optics, Nankai University, Tianjin Key Laboratory of Micro-scale Optical Information Science and Technology, Tianjin 300350, China.
| | - Jie-Rong Cheng
- Institute of Modern Optics, Nankai University, Tianjin Key Laboratory of Micro-scale Optical Information Science and Technology, Tianjin 300350, China.
| | - Xiang-Hui Wang
- Institute of Modern Optics, Nankai University, Tianjin Key Laboratory of Micro-scale Optical Information Science and Technology, Tianjin 300350, China.
| | - Sheng-Jiang Chang
- Institute of Modern Optics, Nankai University, Tianjin Key Laboratory of Micro-scale Optical Information Science and Technology, Tianjin 300350, China.
- Tianjin Key Laboratory of Optoelectronic Sensor and Sensing Network Technology, Tianjin 300350, China
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Sun J, Liu YQ, Li J, Zhang X, Cai H, Zhu X, Yin H. Flexible Metamaterial Quarter-Wave Plate and Its Application in Blocking the Backward Reflection of Terahertz Waves. NANOMATERIALS (BASEL, SWITZERLAND) 2023; 13:1279. [PMID: 37049372 PMCID: PMC10097020 DOI: 10.3390/nano13071279] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/15/2023] [Revised: 04/02/2023] [Accepted: 04/03/2023] [Indexed: 06/19/2023]
Abstract
A terahertz flexible metamaterial quarter-wave plate (QWP) is designed and fabricated using polyimide as the substrate in this paper, with a 3 dB axial ratio bandwidth of 0.51 THz and high polarization conversion efficiency and transmittance. The effect of the incidence angle on the polarization conversion performance of the QWP is discussed by measuring the transmissions at multiple incidence angles. The blocking effect of this QWP combined with a polarizer on the backward reflection of terahertz waves is investigated by terahertz time-domain spectral transmission experiments. By adjusting the angle of the QWP and polarizer with respect to the incident light in the optical path, a blocking efficiency of 20 dB can be achieved at a 20° incidence angle, with a bandwidth of 0.25 THz, a maximum blocking efficiency of 58 dB at 1.73 THz, and an insertion loss of only 1.4 dB. Flexible terahertz metamaterial QWPs and polarizers can effectively block harmful reflected waves in terahertz communication and other systems. They have the advantages of a simple structure, ultra-thinness and flexibility, easy integration, no external magnetic field, and no low-temperature and other environmental requirements, thus having broad application prospects for terahertz on-chip integrated systems.
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Affiliation(s)
- Jinhai Sun
- National Key Laboratory of Scattering and Radiation, Beijing 100854, China
| | - Yong-Qiang Liu
- National Key Laboratory of Scattering and Radiation, Beijing 100854, China
| | - Jining Li
- Institute of Laser and Optoelectronics, School of Precision Instruments and Opto-Electronics Engineering, Tianjin University, Tianjin 300072, China
| | - Xutao Zhang
- National Key Laboratory of Scattering and Radiation, Beijing 100854, China
| | - He Cai
- National Key Laboratory of Scattering and Radiation, Beijing 100854, China
| | - Xianli Zhu
- National Key Laboratory of Scattering and Radiation, Beijing 100854, China
| | - Hongcheng Yin
- National Key Laboratory of Scattering and Radiation, Beijing 100854, China
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Shi WN, Fan F, Zhang TR, Liu JY, Wang XH, Chang S. Terahertz phase shift sensing and identification of a chiral amino acid based on a protein-modified metasurface through the isoelectric point and peptide bonding. BIOMEDICAL OPTICS EXPRESS 2023; 14:1096-1106. [PMID: 36950227 PMCID: PMC10026576 DOI: 10.1364/boe.484181] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/22/2022] [Revised: 01/31/2023] [Accepted: 02/03/2023] [Indexed: 06/18/2023]
Abstract
The efficient sensing of amino acids, especially the distinction of their chiral enantiomers, is important for biological, chemical, and pharmaceutical research. In this work, a THz phase shift sensing method was performed for amino acid detection based on a polarization-dependent electromagnetically induced transparency (EIT) metasurface. More importantly, a method for binding the specific amino acids to the functional proteins modified on the metasurface was developed based on the isoelectric point theory so that the specific recognition for Arginine (Arg) was achieved among the four different amino acids. The results show that via high-Q phase shift, the detection precision for L-Arg is 2.5 × 10-5 g /ml, much higher than traditional sensing parameters. Due to the specific electrostatic adsorption by the functionalized metasurface to L-Arg, its detection sensitivity and precision are 22 times higher than the other amino acids. Furthermore, by comparing nonfunctionalized and functionalized metasurfaces, the D- and L-chiral enantiomers of Arg were distinguished due to their different binding abilities to the functionalized metasurface. Therefore, this EIT metasurface sensor and its specific binding method improve both detection precision and specificity in THz sensing for amino acids, and it will promote the development of THz highly sensitive detection of chiral enantiomers.
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Affiliation(s)
- Wei-Nan Shi
- Institute of Modern Optics, Nankai University, Tianjin Key Laboratory of Micro-scale Optical Information Science and Technology, Tianjin 300350, China
| | - Fei Fan
- Institute of Modern Optics, Nankai University, Tianjin Key Laboratory of Micro-scale Optical Information Science and Technology, Tianjin 300350, China
- Tianjin Key Laboratory of Optoelectronic Sensor and Sensing Network Technology, Tianjin 300350, China
| | - Tian-Rui Zhang
- Institute of Modern Optics, Nankai University, Tianjin Key Laboratory of Micro-scale Optical Information Science and Technology, Tianjin 300350, China
| | - Jia-Yue Liu
- Institute of Modern Optics, Nankai University, Tianjin Key Laboratory of Micro-scale Optical Information Science and Technology, Tianjin 300350, China
| | - Xiang-Hui Wang
- Institute of Modern Optics, Nankai University, Tianjin Key Laboratory of Micro-scale Optical Information Science and Technology, Tianjin 300350, China
| | - ShengJiang Chang
- Tianjin Key Laboratory of Optoelectronic Sensor and Sensing Network Technology, Tianjin 300350, China
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Wang L, Wang Q, Wang TQ, Zhao WM, Yin XY, Jiang JX, Zhang SS. Plasmonic crescent nanoarray-based surface lattice resonance sensor with a high figure of merit. NANOSCALE 2022; 14:6144-6151. [PMID: 35388826 DOI: 10.1039/d1nr08341d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Due to the natural accumulation of radiation losses arising from the localization and random arrangement of nanoparticles, the figure of merit (FOM) of localized surface plasmon resonance (LSPR) sensors is usually very low (the value is usually less than 5 RIU-1). However, radiation losses of individual particles will be offset by adjusting the phase of the scattered field which is dependent on the structure parameters of arrays. Based on this, a two-dimensional periodic crescent nanoarray-based surface lattice resonance (SLR) sensor with a high FOM is proposed in this work. Some significant results have been obtained by mode field analysis and adjustment of structural parameters. On the one hand, the line-shape of the SLR spectrum is divided into a Fano-like line and a separate line. And the former usually has an FOM of 101 magnitude while the latter has an FOM of 103 magnitude. On the other hand, the relative size of the excitation wavelengths between SLR and LSPR is also vital. The FOM is higher but resonance depth decreases faster when the relative size increases. In this work, a full width at half-maximum (FWHM) of less than 0.5 nm and FOM of more than 1000 RIU-1 (the quality factor is more than 3000) are achieved by the proposed crescent nanoarrays. In addition, this structure demonstrates that plasmonic nanoarray-based SLR has enormous potential in trace substance detection.
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Affiliation(s)
- Lei Wang
- College of Information Science and Engineering, Northeastern University, Shenyang 110819, China.
| | - Qi Wang
- College of Information Science and Engineering, Northeastern University, Shenyang 110819, China.
- State Key Laboratory of Synthetical Automation for Process Industries (Northeastern University), Shenyang 110819, China
- Hebei Key Laboratory of Micro-Nano Precision Optical Sensing and Measurement Technology, Qinhuangdao 066004, China
- State Key Laboratory of Chemo/Biosensing and Chemometrics, Hunan University, Changsha 410082, China
| | - Tie-Qiang Wang
- College of Science, Northeastern University, Shenyang 110819, China
| | - Wan-Ming Zhao
- College of Information Science and Engineering, Northeastern University, Shenyang 110819, China.
| | - Xiang-Yu Yin
- College of Information Science and Engineering, Northeastern University, Shenyang 110819, China.
| | - Ju-Xin Jiang
- College of Information Science and Engineering, Northeastern University, Shenyang 110819, China.
| | - Shu-Shuai Zhang
- College of Information Science and Engineering, Northeastern University, Shenyang 110819, China.
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Liu M, Yu L, Lei Y, Fang X, Ma Y, Liu L, Zheng J, Lin K, Gao P. Numerical Investigation of Multifunctional Plasmonic Micro-Fiber Based on Fano Resonances and LSPR Excited via Cylindrical Vector Beam. SENSORS 2021; 21:s21165642. [PMID: 34451083 PMCID: PMC8402329 DOI: 10.3390/s21165642] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/22/2021] [Revised: 08/13/2021] [Accepted: 08/18/2021] [Indexed: 12/23/2022]
Abstract
Function expansion of fiber sensor is highly desired for ultrasensitive optical detection and analysis. Here, we present an approach of multifunctional fiber sensor based on Fano resonances and localized surface plasmon resonance (LSPR) excited via cylindrical vector beam with ability of refractive index (RI) sensing, nano-distance detection, and surface enhanced Raman spectroscopy (SERS). Silver (Ag)-nanocube modified microfiber is theoretically proved to enable to detect RI of the nearby solids and gases based on Fano resonances with a sensitivity of 128.63 nm/refractive index unit (RIU) and 148.21 nm/RIU for solids and gases, respectively. The scattering spectrum of the Ag nanocube has the red-shift response to the varies of the nano-distance between the nanocube and the nearby solid, providing a detection sensitivity up to 1.48 nm (wavelength)/nm (distance). Moreover, this configuration is theoretically verified to have ability to significantly enhance electric field intensity. Radially polarized beam is proved to enhance the electric field intensity as large as 5 times in the side-face configuration compared with linear polarization beam. This fiber-based sensing method is helpful in fields of remote detection, multiple species detection, and cylindrical vector beam-based detection.
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Affiliation(s)
- Min Liu
- School of Physics and Optoelectronic Engineering, Xidian University, Xi’an 710071, China; (M.L.); (L.Y.); (Y.L.); (X.F.); (Y.M.); (L.L.); (J.Z.); (K.L.)
- Guangzhou Institute of Technology, Xidian University, Guangzhou 510555, China
| | - Lan Yu
- School of Physics and Optoelectronic Engineering, Xidian University, Xi’an 710071, China; (M.L.); (L.Y.); (Y.L.); (X.F.); (Y.M.); (L.L.); (J.Z.); (K.L.)
| | - Yunze Lei
- School of Physics and Optoelectronic Engineering, Xidian University, Xi’an 710071, China; (M.L.); (L.Y.); (Y.L.); (X.F.); (Y.M.); (L.L.); (J.Z.); (K.L.)
| | - Xiang Fang
- School of Physics and Optoelectronic Engineering, Xidian University, Xi’an 710071, China; (M.L.); (L.Y.); (Y.L.); (X.F.); (Y.M.); (L.L.); (J.Z.); (K.L.)
| | - Ying Ma
- School of Physics and Optoelectronic Engineering, Xidian University, Xi’an 710071, China; (M.L.); (L.Y.); (Y.L.); (X.F.); (Y.M.); (L.L.); (J.Z.); (K.L.)
| | - Lixin Liu
- School of Physics and Optoelectronic Engineering, Xidian University, Xi’an 710071, China; (M.L.); (L.Y.); (Y.L.); (X.F.); (Y.M.); (L.L.); (J.Z.); (K.L.)
| | - Juanjuan Zheng
- School of Physics and Optoelectronic Engineering, Xidian University, Xi’an 710071, China; (M.L.); (L.Y.); (Y.L.); (X.F.); (Y.M.); (L.L.); (J.Z.); (K.L.)
| | - Ke Lin
- School of Physics and Optoelectronic Engineering, Xidian University, Xi’an 710071, China; (M.L.); (L.Y.); (Y.L.); (X.F.); (Y.M.); (L.L.); (J.Z.); (K.L.)
| | - Peng Gao
- School of Physics and Optoelectronic Engineering, Xidian University, Xi’an 710071, China; (M.L.); (L.Y.); (Y.L.); (X.F.); (Y.M.); (L.L.); (J.Z.); (K.L.)
- Correspondence:
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