54 citations · 140 across the 10 of their papers we have counts for
10 papers
Electrically Driven Hyperbolic Nanophotonic Resonators as High Speed, Spectrally Selective Thermal Radiators
John Andris Roberts, Po-Hsun Ho, Shang-Jie Yu +1
We introduce and experimentally demonstrate a new class of electrically driven thermal emitter based on globally aligned carbon nanotube metamaterials patterned as nanoscale ribbon…
Multiple Tunable Hyperbolic Resonances in Broadband Infrared Carbon-Nanotube Metamaterials
John Andris Roberts, Po-Hsun Ho, Shang-Jie Yu +5
Aligned, densely-packed carbon nanotube metamaterials prepared using vacuum filtration are an emerging infrared nanophotonic material. We report multiple hyperbolic plasmon resonan…
Tunable Hyperbolic Metamaterials Based on Self-Assembled Carbon Nanotubes
John Andris Roberts, Shang-Jie Yu, Po-Hsun Ho +3
We show that packed, horizontally aligned films of single-walled carbon nanotubes are hyperbolic metamaterials with ultra-subwavelength unit cells and dynamic tunability. Using Mue…
Intrinsically ultrastrong plasmon-exciton interactions in crystallized films of carbon nanotubes
Po-Hsun Ho, Damon B. Farmer, George S. Tulevski +6
In cavity quantum electrodynamics, optical emitters that are strongly coupled to cavities give rise to polaritons with characteristics of both the emitters and the cavity excitatio…
Strong and broadly tunable plasmon resonances in thick films of aligned carbon nanotubes
Kuan-Chang Chiu, Abram L. Falk, Po-Hsun Ho +5
Low-dimensional plasmonic materials can function as high quality terahertz and infrared antennas at deep subwavelength scales. Despite these antennas' strong coupling to electromag…
Environment-insensitive and gate-controllable photocurrent enabled by bandgap engineering of MoS2 junctions
Fu-Yu Shih, Yueh-Chun Wu, Yi-Siang Shih +6
Two-dimensional (2D) materials are composed of atomically thin crystals with an enormous surface-to-volume ratio, and their physical properties can be easily subjected to the chang…
Observation of quantum Hall plateau-plateau transition and scaling behavior of the zeroth Landau level in graphene p-n-p junctions
Cheng-Hua Liu, Po-Hsiang Wang, Tak-Pong Woo +6
We report distinctive magnetotransport properties of a graphene p-n-p junction prepared by controlled diffusion of metallic contacts. In most cases, materials deposited on a graphe…
Demonstration of distinct semiconducting transport characteristics of monolayer graphene functionalized via plasma activation of substrate surfaces
Po-Hsiang Wang, Fu-Yu Shih, Shao-Yu Chen +7
We report semiconducting behavior of monolayer graphene enabled through plasma activation of substrate surfaces. The graphene devices are fabricated by mechanical exfoliation onto…
Extrinsic Origin of Persistent Photoconductivity in Monolayer MoS2 Field Effect Transistors
Yueh-Chun Wu, Cheng-Hua Liu, Shao-Yu Chen +5
Recent discoveries of the photoresponse of molybdenum disulfide (MoS2) have shown the considerable potential of these two-dimensional transition metal dichalcogenides for optoelect…
Biologically inspired graphene-chlorophyll phototransistors with high gain
Shao-Yu Chen, Yi-Ying Lu, Fu-Yu Shih +5
We present prominent photoresponse of bio-inspired graphene-based phototransistors sensitized with chlorophyll molecules. The hybrid graphene-chlorophyll phototransistors exhibit a…