A5001696162- Plasmonic and Surface Plasmon Research
- Graphene research and applications
- Photonic and Optical Devices
- 2D Materials and Applications
- Perovskite Materials and Applications
- Metamaterials and Metasurfaces Applications
- Semiconductor Quantum Structures and Devices
- Thermal Radiation and Cooling Technologies
- Spectroscopy and Laser Applications
- Advanced Semiconductor Detectors and Materials
- Molecular Junctions and Nanostructures
- Photonic Crystals and Applications
- Advanced Thermodynamics and Statistical Mechanics
- Topological Materials and Phenomena
TU Wien
2015-2021
Photonics (United States)
2021
University of Vienna
2019
University of Applied Sciences Technikum Wien
2017
With its electrically tunable light absorption and ultrafast photoresponse, graphene is a promising candidate for high-speed chip-integrated photonics. The generation mechanisms of photosignals in photodetectors have been studied extensively the past years. However, knowledge about efficient conversion at p-n junctions has not yet translated into high-performance devices. Here, we present photodetector integrated on silicon slot-waveguide, acting as dual gate to create junction optical...
Abstract Graphene integrated photonics provides several advantages over conventional Si photonics. Single layer graphene (SLG) enables fast, broadband, and energy-efficient electro-optic modulators, optical switches photodetectors (GPDs), is compatible with any waveguide. The last major barrier to SLG-based receivers lies in the current GPDs’ low responsivity when compared PDs. Here we overcome this by integrating a photo-thermoelectric GPD microring resonator. Under critical coupling,...
We present a graphene photodetector for telecom applications based on silicon photonic crystal defect waveguide. The structure is used to confine the propagating light in narrow region layer enhance light-matter interaction. Additionally, it utilized as split-gate electrode create pn-junction vicinity of optical absorption region. waveguide allows optimal photo-thermoelectric conversion occurring temperature profile into photovoltage due additional slabs both sides waveguide, enhancing...
Layered transition metal dichalcogenide semiconductors, such as MoS2 and WSe2 , exhibit a range of fascinating properties are being currently explored for variety electronic optoelectronic devices. These include low thermal conductivity large Seebeck coefficient, which make them promising thermoelectric applications. Moreover, dichalcogenides undergo an indirect-to-direct bandgap when thinned down in thickness, leading to strong excitonic photo- electroluminescence monolayers. Here, it is...
Abstract Heterostructures based on atomically thin semiconductors are considered a promising emerging technology for the realization of ultrathin and ultralight photovoltaic solar cells flexible substrates. Much progress has been made in recent years technological level, but clear picture physical processes that govern response remains elusive. Here, we present device model is able to fully reproduce current–voltage characteristics type-II van der Waals heterojunctions under optical...
We present the design simulation and characterization of a quantum cascade detector operating at 4.3μm wavelength. Array integration packaging processes were investigated. The device operates in CO2 absorption region consists 64 pixels. is designed fully compatible to standard processing material growth methods for scalability large pixel counts. optimized high resistance elevated temperatures. A QCD model was enhanced responsivity optimization. substrate illuminated pixels utilize two...
Understanding and controlling collective oscillations of electrons in graphene have enabled new classes devices for deep subwavelength metamaterials, extraordinarily strong light–matter interactions, nano-optoelectronic switches. Here, we demonstrate both theoretically experimentally that the plasmon–plasmon plasmon–radiation interactions modify strongly plasmon resonance energy, radiative damping, oscillator strength nanoribbon arrays. As filling factor approaches one, energy becomes zero....
Plasmons in patterned graphene have attracted much interest because of possible applications sensing, nanophotonics, and optoelectronics. We perform mid far-infrared optical studies electrically doped nanoribbon arrays as a function the filling factor compare results with unpatterned graphene. demonstrate that an increase both free carrier concentration intensifies plasmon-plasmon plasmon-radiation interactions. As result, free-carrier dynamics manifested itself strong plasmon redshift...
Get PDF Email Share with Facebook Tweet This Post on reddit LinkedIn Add to CiteULike Mendeley BibSonomy Citation Copy Text T. Mueller, M. Furchi, A. Zechmeister, S. Schuler, and Pospischil, "Atomically-thin van der Waals Heterostructure Solar Cells," in CLEO: 2015, OSA Technical Digest (online) (Optica Publishing Group, 2015), paper FTh3E.2. Export BibTex Endnote (RIS) HTML Plain alert Save article
The integration of electrical and optical components on a single chip, favourable silicon, is major goal in research. Thereby, bottleneck the active passive elements. Graphene, with its electrically tuneable absorption ultrafast photoresponse, promising candidate to move step closer towards high-speed on-chip integration. We fabricated dual-gate pn-junction graphene phototdetector investigate relevant conversion mechanisms. photodector integrated silicon slot waveguide, which has twofold...
Resonant cavities, confining light in sub-wavelength dimensions are key elements of the rapid advance development on-chip optoelectronic devices. Recently, graphene has been studied for its physical and device properties, revealing fascinating properties ultrafast compact communication systems [1]. However, response cannot compete with state-of-the art technology. Here, we present a detector concept combining resonant cavity together as shown Fig 1(a). The constructive interference inside...
Mid-infrared detection with semiconductor based pixel arrays attracted constant research interest over the past years. Remaining challenges for intersubband detectors are high device performance at elevated temperatures in combination cost effective scalability to large counts needed applications remote sensing and resolution infrared imaging. In this field, quantum cascade may offer promising advantages such as photovoltaic room temperature operation a designable wavelength compatibility...