Isaac Ruiz
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View article: Detection of high energy ionizing radiation using deeply depleted graphene–oxide–semiconductor junctions
Detection of high energy ionizing radiation using deeply depleted graphene–oxide–semiconductor junctions Open
Graphene’s linear band structure and two-dimensional density of states provide an implicit advantage for sensing charge. Here, these advantages are leveraged in a deeply depleted graphene–oxide–semiconductor (D2GOS) junction detector archi…
View article: Enhancing Graphene Plasmonic Device Performance via its Dielectric Environment.
Enhancing Graphene Plasmonic Device Performance via its Dielectric Environment. Open
coefficient are used to efficiently survey the effect of the surrounding dielectric on the tuning of the graphene plasmon. By investigating several common polar materials, optical phonons (i.e., the Reststrahlen band) of the dielectric sub…
View article: Enhancing Graphene Plasmonic Device Performance via its Dielectric Environment
Enhancing Graphene Plasmonic Device Performance via its Dielectric Environment Open
Graphene plasmons provide a compelling avenue toward chip-scale dynamic tuning of infrared light. Dynamic tunability emerges through controlled alterations in the optical properties of the system defining graphene’s plasmonic dispersion. T…
View article: Monolithically fabricated tunable long-wave infrared detectors based on dynamic graphene metasurfaces
Monolithically fabricated tunable long-wave infrared detectors based on dynamic graphene metasurfaces Open
Here, the design, fabrication, and characterization of an actively tunable long-wave infrared detector, made possible through direct integration of a graphene-enabled metasurface with a conventional type-II superlattice infrared detector, …
View article: Interface Defect Engineering for Improved Graphene-Oxide-Semiconductor Junction Photodetectors
Interface Defect Engineering for Improved Graphene-Oxide-Semiconductor Junction Photodetectors Open
The deeply depleted graphene-oxide-semiconductor (D2GOS) junction detector provides an effective architecture for photodetection, enabling direct readout of photogenerated charge. Because of an inherent gain mechanism proportional to graph…
View article: The deeply depleted graphene-insulator-semiconductor junction: a versatile approach towards light sensing across the electromagnetic spectrum (Conference Presentation)
The deeply depleted graphene-insulator-semiconductor junction: a versatile approach towards light sensing across the electromagnetic spectrum (Conference Presentation) Open
The deeply depleted graphene-insulator-semiconductor (D2GOS) junction has been shown to be a promising device structure for photon detection, due to its high responsivity, signal to noise ratio and ability for direct readout of individual …
View article: Depleted Graphene-Oxide-Semiconductor Junctions for High Energy Radiation Detection
Depleted Graphene-Oxide-Semiconductor Junctions for High Energy Radiation Detection Open
The deeply depleted graphene-oxide-semiconductor junction (D 2 GOS) architecture has been shown to be a highly sensitive light detector [1]. In this architecture, photogenerated charge in the depletion region of the semiconductor is separa…
View article: A metasurface optical modulator using voltage-controlled population of quantum well states
A metasurface optical modulator using voltage-controlled population of quantum well states Open
The ability to control the light-matter interaction with an external stimulus is a very active area of research since it creates exciting new opportunities for designing optoelectronic devices. Recently, plasmonic metasurfaces have proven …
View article: Reflectance modulation from a metasurface coupled to intersubband transitions in semiconductor quantum wells using quantum tunneling (Conference Presentation)
Reflectance modulation from a metasurface coupled to intersubband transitions in semiconductor quantum wells using quantum tunneling (Conference Presentation) Open
Coupling of metasurfaces to intersubband transitions (ISTs) in semiconductor quantum wells (QWs) has been extensively studied for various applications ranging from generating giant nonlinear optical response to designing tunable metasurfac…
View article: Low dissipation spectral filtering using a field-effect tunable III–V hybrid metasurface
Low dissipation spectral filtering using a field-effect tunable III–V hybrid metasurface Open
Considering the power constrained scaling of silicon complementary metal-oxide-semiconductor technology, the use of high mobility III–V compound semiconductors such as In0.53Ga0.47As in conjunction with high-κ dielectrics is becoming a pro…
View article: Tunable dual-band graphene-based infrared reflectance filter
Tunable dual-band graphene-based infrared reflectance filter Open
We experimentally demonstrated an actively tunable optical filter that controls the amplitude of reflected long-wave-infrared light in two separate spectral regions concurrently. Our device exploits the dependence of the excitation energy …
View article: Dual-band tunable graphene-based filter
Dual-band tunable graphene-based filter Open
We have demonstrated a scalable dual-band tunable infrared filter based on gating of a continuous graphene layer. The measured and modeled response of the device are in good agreement.
View article: Visibility of dielectrically passivated graphene films
Visibility of dielectrically passivated graphene films Open
The visibility of monolayer graphene is dependent on its surrounding dielectric environment and the presence of any contamination associated with 2D layer transfer. Here, the optical contrast of residually contaminated monolayer graphene e…
View article: Designing graphene absorption in a multispectral plasmon-enhanced infrared detector
Designing graphene absorption in a multispectral plasmon-enhanced infrared detector Open
We have examined graphene absorption in a range of graphene-based infrared devices that combine either monolayer or bilayer graphene with three different gate dielectrics. Electromagnetic simulations show that the optical absorption in gra…
View article: Infrared Chameleon: Graphene Phonons & the Impact of their Interplay on Photodetection.
Infrared Chameleon: Graphene Phonons & the Impact of their Interplay on Photodetection. Open
not provided.
View article: Chemical vapor deposition of partially oxidized graphene
Chemical vapor deposition of partially oxidized graphene Open
Mutlu et al. reported on chemical vapor deposition (CVD) of partially oxidized graphene films on copper foils under near-atmospheric pressure.
View article: Scalable Synthesis of Monolayer Graphene and Graphene Oxide Films by CVD
Scalable Synthesis of Monolayer Graphene and Graphene Oxide Films by CVD Open
Over the last decade, graphene has generated immense excitement in the scientific and engineering community due to its extraordinary properties stemming from its 2 dimensional structure. As research in graphene has begun to taper off and d…