首页|Engineering high-performance dielectric chiral shells with enhanced chiral fields for sensitive chiral biosensor

Engineering high-performance dielectric chiral shells with enhanced chiral fields for sensitive chiral biosensor

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Chiral metamaterials have been a topic of sig-nificant research interest in recent years due to their potential for various applications in nanophotonic devices and chiral biosensors.However,the intrinsic Ohmic loss in surface plasmonic resonance has limited their practical use,resulting in large light dissipation and weak chiroptical resonance.Here,we report on the development of high-performance dielectric chiral shells(DCS)through a two-step Si deposition process on a self-assembled micro-sphere monolayer.The form DCS sample completely overcomes the cancelation effect originated from the dis-order property of the micro-sphere monolayer in macro-scale,and at a wavelength of approximately 710 nm,the measured optimal chiral signal(g-factor)and transmittance can reach up to 0.7 and 0.3,respectively.The strong chi-roptical effect comes from the asymmetric circular dis-placement currents(i.e.,magnetic modes)enabled by the specific shell geometry.The chiral shell geometry,elec-tromagnetic properties,sensor sensitivity of chiral mole-cules and figure of merit are systematically investigated.The DCSs demonstrate highly sensitive detection of chiral biomolecules owing to their easily accessible geometry and enhanced uniform chiral field.

Dielectric chiral shells(DCS)Si depositionMagnetic resonanceHighly sensitive sensorChiral field

Yi-Fan Wang、Shan-Shan Huang、Zhen-Dong Dai、Shi-Lin Xian、Xuan-Nan Wu、Fu-Hua Gao、Yi-Dong Hou

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College of Physics,Sichuan University,Chengdu 610065,China

Graduate School of Sichuan University,Sichuan University,Chengdu 610065,China

National Natural Science Foundation of ChinaInternational Visiting Program for Excellent Young Scholars of SCUInternational Science and Technology Innovation Cooperation of Sichuan Province

116042272018150421GJHZ0230

2024

10.1007/s12598-023-02459-x

稀有金属(英文版)
中国有色金属学会

稀有金属(英文版)

CSTPCDEI
影响因子：0.801
ISSN：1001-0521
年,卷(期)：2024.43(3)
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