Acta Photonica Sinica, Volume. 50, Issue 10, 1024001(2021)
Anisotropic Surface Plasmon Resonance Spectroscopy and Infrared Sensing Properties Employing Graphene-Black Phosphorus Heterostructure(Invited)
The surface plasmon device based on single-layer black phosphorous exhibits low light absorption. To address this issue, an anisotropic graphene-black phosphorus heterostructure plasmonicresonator is proposed, and the resonance spectrum and infrared sensing characteristic are studied. The designed graphene-black phosphorus heterostructure and asymmetric Fabry-Perot-like structure can improve the excitation efficiency of surface plasmons. It is found that the absorption of the proposed device can reach to 95.54% and 97.44% along x- and y-directions, respectively, by optimizing the thickness of dielectric layer of optical resonator. In addition, by changing the polarization direction of incident light to dynamically adjust the resonant wavelength, the maximum enhancement factor of 88 and 155 can be achieved for detecting v(COC)s and r(CH2)a modes of polyethylene oxide molecular film with the thickness of 8 nm. The proposed anisotropic device with waveband tunable, high enhancement factor is expected to have the great potential applications in the detection of trace level samples.
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Peng LUO, Wei WEI, Guilian LAN, Rong CHEN, Xiaojian ZHANG, Jinpeng NONG, Yan LIU, Genquan HAN. Anisotropic Surface Plasmon Resonance Spectroscopy and Infrared Sensing Properties Employing Graphene-Black Phosphorus Heterostructure(Invited)[J]. Acta Photonica Sinica, 2021, 50(10): 1024001
Category: Optics at Surfaces
Received: Jul. 21, 2021
Accepted: Aug. 27, 2021
Published Online: Nov. 3, 2021
The Author Email: WEI Wei (wwei@cqu.edu.cn)