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School of Electrical and Electronic Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, Singapore
Interdisciplinary Center for Quantum Information, State Key Laboratory of Modern Optical Instrumentation, ZJU-Hangzhou Global Science and Technology Innovation Center, College of Information Science and Electronic Engineering, Zhejiang University, Hangzhou 310027, China
International Joint Innovation Center,ZJU-UIUC Institute, Zhejiang University, Haining 314400, China
Division of Physics and Applied Physics, School of Physical and Mathematical Sciences,Nanyang Technological University, 21 Nanyang Link, Singapore 637371, Singapore
Centre for Disruptive Photonic Technologies, Nanyang Technological University, 21 Nanyang Link, Singapore 637371, Singapore
UMI 3288 CINTRA,CNRS/NTU/THALES, Nanyang Technological University, 50 Nanyang Drive, Singapore 637553, Singapore
*blzhang@ntu.edu.sg
luoyu@ntu.edu.sg
Published:2022-12,
Published Online:04 January 2022,
Received:06 August 2021,
Revised:05 November 2021,
Accepted:20 November 2021
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Hao Hu, Xiao Lin, Liang Jie Wong, et al. Surface Dyakonov–Cherenkov radiation. [J]. eLight, 2022,2(1).
Hao Hu, Xiao Lin, Liang Jie Wong, et al. Surface Dyakonov–Cherenkov radiation. [J]. eLight, 2022,2(1). DOI: 10.1186/s43593-021-00009-5.
Recent advances in engineered material technologies (e.g.
photonic crystals
metamaterials
plasmonics
etc.) provide valuable tools to control Cherenkov radiation. In all these approaches
however
the particle velocity is a key parameter to affect Cherenkov radiation in the designed material
while the influence of the particle trajectory is generally negligible. Here
we report on surface Dyakonov–Cherenkov radiation
i.e. the emission of directional Dyakonov surface waves from a swift charged particle moving atop a birefringent crystal. This new type of Cherenkov radiation is highly susceptible to both the particle velocity and trajectory
e.g. we observe a sharp radiation enhancement when the particle trajectory falls in the vicinity of a particular direction. Moreover
close to the Cherenkov threshold
such a radiation enhancement can be orders of magnitude higher than that obtained in traditional Cherenkov detectors.These distinct properties allow us to determine simultaneously the magnitude and direction of particle velocities on a compact platform. The surface Dyakonov–Cherenkov radiation studied in this work not only adds a new degree of freedom for particle identification
but also provides an all-dielectric route to construct compact Cherenkov detectors with enhanced sensitivity.
Cherenkov radiationDyakonov surface waveParticle detector
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