83 citations · 366 across the 11 of their papers we have counts for
9 papers · 1 filter
Generalized Fowler-Nordheim field-induced vertical electron emission model for two-dimensional materials
Yee Sin Ang, M. Zubair, K. J. A. Ooi +1
Current theoretical description of field-induced electron emission remains mostly bounded by the classic Fowler-Nordheim (FN) framework developed nearly one century ago. For the em…
Highly Efficient Midinfrared On-Chip Electrical Generation of Graphene Plasmons by Inelastic Electron Tunneling Excitation
Kelvin J. A. Ooi, Hong Son Chu, Chang Yu Hsieh +2
Inelastic electron tunneling provides a low-energy pathway for the excitation of surface plasmons and light emission. We theoretically investigate tunnel junctions based on metals…
Efficiencies of Aloof-Scattered Electron Beam Excitation of Metal and Graphene Plasmons
Kelvin J. A. Ooi, Wee Shing Koh, Hong Son Chu +2
We assessed the efficiencies of surface plasmon excitation by an aloof-scattered electron beam on metals and graphene. Graphene is shown to exhibit high energy transfer efficiencie…
Waveguide engineering of graphene's nonlinearity
Kelvin J. A. Ooi, Lay Kee Ang, Dawn T. H. Tan
Graphene has recently been shown to possess giant nonlinearity; however, the utility of this nonlinearity is limited due to high losses and small interaction volume. We show that b…
Electro-optical graphene plasmonic logic gates
Kelvin J. A. Ooi, Hong Son Chu, Ping Bai +1
The versatile control of graphene's plasmonic modes via an external gate-voltage inspires us to design efficient electro-optical graphene plasmonic logic gates at the midinfrared w…
Design of a Monopole Antenna Based Resonant Nanocavity for Detection of Optical Power from Hybrid Plasmonic Waveguides
Kelvin J. A. Ooi, Ping Bai, Ming Xia Gu +1
A novel plasmonic waveguide-coupled nanocavity with a monopole antenna is proposed to localize the optical power from a hybrid plasmonic waveguide and subsequently convert it into…
Mid-infrared Active Graphene Nanoribbon Plasmonic Waveguide Devices
Kelvin J. A. Ooi, Hong Son Chu, Lay Kee Ang +1
Doped graphene emerges as a strong contender for active plasmonic material in the mid-infrared wavelengths due to the versatile external-control of its permittivity-function and al…
Ultracompact Vanadium Dioxide Dual-Mode Plasmonic Waveguide Electroabsorption Modulator
Kelvin J. A. Ooi, Ping Bai, Hong Son Chu +1
Subwavelength modulators play an indispensable role in integrated photonic-electronic circuits. Due to weak light-matter interactions, it is always a challenge to develop a modulat…
Plasmonic coupled-cavity system for enhancement of surface plasmon localization in plasmonic detectors
Kelvin J. A. Ooi, Ping Bai, Ming Xia Gu +1
A plasmonic coupled-cavity system, which consists of a quarter-wave coupler cavity, a resonant Fabry-Perot detector nanocavity, and an off-resonant reflector cavity, is used to enh…