Ouri Karni
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View article: Ultrafast optical gating in a nonlinear lithium niobate microcavity
Ultrafast optical gating in a nonlinear lithium niobate microcavity Open
Recent advances in optical simulation and computational techniques have renewed interest in high-finesse optical cavities for applications such as enhancing light-matter interactions, engineering complex photonic band structures, and stori…
View article: Design and function of a vertical micro-cavity optical parametric oscillator
Design and function of a vertical micro-cavity optical parametric oscillator Open
Optical parametric oscillators (OPOs) have emerged as highly versatile platforms for signal processing, machine learning, and all-optical computation. In particular, integrated photonic circuits have demonstrated an efficient and scalable …
View article: Controlling Valley-Specific Light Emission from Monolayer MoS<sub>2</sub> with Achiral Dielectric Metasurfaces
Controlling Valley-Specific Light Emission from Monolayer MoS<sub>2</sub> with Achiral Dielectric Metasurfaces Open
Excitons in two-dimensional transition metal dichalcogenides have a valley degree of freedom that can be optically manipulated for quantum information processing. Here, we integrate MoS2 monolayers with achiral silicon disk array metasurfa…
View article: Achiral dielectric metasurfaces for spectral and polarization control of valley specific light emission from monolayer MoS2
Achiral dielectric metasurfaces for spectral and polarization control of valley specific light emission from monolayer MoS2 Open
Excitons in two-dimensional transition metal dichalcogenides have a valley degree of freedom that can be optically accessed and manipulated for quantum information processing. Here, we integrate MoS2 with achiral silicon disk array metasur…
View article: Through the Lens of a Momentum Microscope: Viewing Light‐Induced Quantum Phenomena in 2D Materials
Through the Lens of a Momentum Microscope: Viewing Light‐Induced Quantum Phenomena in 2D Materials Open
Van der Waals (vdW) materials at their 2D limit are diverse, flexible, and unique laboratories to study fundamental quantum phenomena and their future applications. Their novel properties rely on their pronounced Coulomb interactions, vari…
View article: Optical absorption of interlayer excitons in transition-metal dichalcogenide heterostructures
Optical absorption of interlayer excitons in transition-metal dichalcogenide heterostructures Open
Interlayer excitons, electron-hole pairs bound across two monolayer van der Waals semiconductors, offer promising electrical tunability and localizability. Because such excitons display weak electron-hole overlap, most studies have examine…
View article: Moiré-localized interlayer exciton wavefunctions captured by imaging its electron and hole constituents
Moiré-localized interlayer exciton wavefunctions captured by imaging its electron and hole constituents Open
Interlayer excitons (ILXs) - electron-hole pairs bound across two atomically thin layered semiconductors - have emerged as attractive platforms to study exciton condensation, single-photon emission and other quantum-information application…
View article: High-Performance p–n Junction Transition Metal Dichalcogenide Photovoltaic Cells Enabled by MoO<sub><i>x</i></sub> Doping and Passivation
High-Performance p–n Junction Transition Metal Dichalcogenide Photovoltaic Cells Enabled by MoO<sub><i>x</i></sub> Doping and Passivation Open
Layered semiconducting transition metal dichalcogenides (TMDs) are promising materials for high-specific-power photovoltaics due to their excellent optoelectronic properties. However, in practice, contacts to TMDs have poor charge carrier …
View article: Ramsey fringes in a room-temperature quantum-dot semiconductor optical amplifier
Ramsey fringes in a room-temperature quantum-dot semiconductor optical amplifier Open
The ability to induce, observe and control quantum coherent interactions in room temperature, electrically driven optoelectronic devices is of outmost significance for advancing quantum science and engineering towards practical application…
View article: Ultra-fast charge carrier dynamics across the spectrum of an optical gain media based on InAs/AlGaInAs/InP quantum dots
Ultra-fast charge carrier dynamics across the spectrum of an optical gain media based on InAs/AlGaInAs/InP quantum dots Open
The charge carrier dynamics of improved InP-based InAs/AlGaInAs quantum dot (QD) semiconductor optical amplifiers are examined employing the multi-wavelength ultrafast pump-probe measurement technique. The transient transmission response o…
View article: Coherent control in room-temperature quantum dot semiconductor optical amplifiers using shaped pulses
Coherent control in room-temperature quantum dot semiconductor optical amplifiers using shaped pulses Open
We demonstrate the ability to control quantum coherent Rabi-oscillations in a room-temperature quantum dot semiconductor optical amplifier (SOA) by shaping the light pulses that trigger them. The experiments described here show that when t…