2 citations · 8 across the 8 of their papers we have counts for
4 papers · 1 filter
Multi-refractive-index metamaterials based on subwavelength waveguide arrays
Zhaoning Yu, Chenghao Wan, Jad Salman +4
We demonstrate a metamaterial that cannot be described by a single set of refractive-index and impedance values, even for fixed frequency and polarization. The metamaterial structu…
Thermal-emission measurements near room temperature using Fourier-transform infrared spectroscopy
Yuzhe Xiao, Alireza Shahsafi, Chenghao Wan +5
Accurate characterization of thermal emitters can be challenging due to the presence of background thermal emission from components of the experimental setup and the surrounding en…
Mid-infrared optics using dielectrics with refractive indices below unity
Alireza Shahsafi, Yuzhe Xiao, Jad Salman +4
Conventional transparent materials at optical frequencies have refractive index values (n) greater than unity -- most commonly between about 1 and 4. This paper explores optical ph…
Limiting optical diodes enabled by the phase transition of vanadium dioxide
Chenghao Wan, Erik Horak, Jonathan King +8
A limiting optical diode is an asymmetric nonlinear device that is bidirectionally transparent at low power, but becomes opaque when illuminated by sufficiently intense light incid…