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Your search keyword '"SaeJune Park"' showing total 2 results
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2 results on '"SaeJune Park"'

1. Increasing the sensitivity of terahertz metamaterials for dielectric sensing by substrate etching

Author

Paul Dean, Lianhe Li, David R. Bacon, SaeJune Park, Mark C. Rosamond, John Cunningham, Thomas B. Gill, Kun Meng, Li Chen, Yeong Hwan Ahn, Christopher D. Wood, Edmund H. Linfield, Andrew D. Burnett, Joshua R. Freeman, and Alexander Giles Davies

Subjects
Materials science, business.industry, Terahertz radiation, fungi, Physics::Optics, Metamaterial, Dielectric, Substrate (electronics), Finite element method, Computer Science::Other, Etching (microfabrication), Optoelectronics, Sensitivity (control systems), business, Refractive index
Abstract

We investigate the effect of the effective substrate refractive index on the sensitivity of terahertz (THz) metamaterials for dielectric sensing by substrate etching. We found the effective refractive index near the metamaterials can be actively controlled by etching, allowing optimization of the sensitivity. Our experimental findings are in good agreement with finite element method (FEM) simulation results.

Published
2020

2. On-chip terahertz spectroscopy of magnetoplasmons in a two-dimensional electron gas

Author

Alexander Giles Davies, Christopher D. Wood, Oleksiy Sydoruk, Rowan Parker-Jervis, SaeJune Park, John Cunningham, Lianhe Li, Simone Zonetti, Jingbo Wu, and Edmund H. Linfield

Subjects
Materials science, Terahertz radiation, law, Cyclotron, Cyclotron resonance, Electron, Atomic physics, Condensed Matter::Mesoscopic Systems and Quantum Hall Effect, Spectroscopy, Electromagnetic simulation, Terahertz spectroscopy and technology, law.invention
Abstract

We report observations of magnetoplasmons at frequencies up to 400 GHz in gated two-dimensional electron gases (2DEG) at low temperature (∼ 2K). We observed bulk magnetoplasmons for frequencies greater than the cyclotron resonance frequency, and attributed resonances occurring at frequencies below the cyclotron resonance to formation of edge magnetoplasmons (EMPs). Our full-wave 3D electromagnetic simulation results are in good agreement with the experimental findings, allowing us to predict the spatial distribution of both bulk and edge magnetoplasmon modes in the 2DEG.

Published
2020

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