Jonathan O. Tollerud
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View article: Ultrafast dynamics of coherent exciton-polaritons in van der Waals semiconductor metasurfaces
Ultrafast dynamics of coherent exciton-polaritons in van der Waals semiconductor metasurfaces Open
Enabling coherent light-matter interactions is a critical step toward next-generation quantum technologies. However, achieving this under ambient temperature conditions remains challenging due to rapid dephasing in optically excited system…
View article: Van der Waals Template‐Assisted Growth of Two‐dimensional Sb<sub>2</sub>S<sub>3</sub>
Van der Waals Template‐Assisted Growth of Two‐dimensional Sb<sub>2</sub>S<sub>3</sub> Open
Antimony sulfide (Sb 2 S 3 ), a representative of the pnictogen chalcogenide family, possesses a tunable bandgap, strong optical absorption, and phase‐change functionality, making it a promising candidate for next‐generation optoelectronic…
View article: Direct measurement of coherent nodal and antinodal dynamics in underdoped Bi-2212
Direct measurement of coherent nodal and antinodal dynamics in underdoped Bi-2212 Open
The physics of strongly correlated materials is deeply rooted in electron interactions and their coupling to low-energy excitations. Unraveling the competing and cooperative nature of these interactions is crucial for connecting microscopi…
View article: Epitaxial Interface‐Driven Photoresponse Enhancement in Monolayer WS<sub>2</sub>–MoS<sub>2</sub> Lateral Heterostructures
Epitaxial Interface‐Driven Photoresponse Enhancement in Monolayer WS<sub>2</sub>–MoS<sub>2</sub> Lateral Heterostructures Open
2D transition metal dichalcogenides heterostructures are driving advancements in next‐generation optoelectronic technologies. Lateral 2D heterojunctions with atomically seamless interfaces play a vital role in modulating charge separation …
View article: Oxygen Driven Defect Engineering of Monolayer MoS<sub>2</sub> for Tunable Electronic, Optoelectronic, and Electrochemical Devices
Oxygen Driven Defect Engineering of Monolayer MoS<sub>2</sub> for Tunable Electronic, Optoelectronic, and Electrochemical Devices Open
Molybdenum disulfide (MoS 2 ), a two‐dimensional (2D) semiconducting material harbors intrinsic defects that can be harnessed to achieve tuneable electronic, optoelectronic, and electrochemical devices. However, achieving precise control o…
View article: Background-free time-resolved coherent Raman spectroscopy (CSRS and CARS): Heterodyne detection of low-energy vibrations and identification of excited-state contributions
Background-free time-resolved coherent Raman spectroscopy (CSRS and CARS): Heterodyne detection of low-energy vibrations and identification of excited-state contributions Open
Coherent Raman scattering (CRS) spectroscopy techniques have been widely developed and optimized for different applications in biomedicine and fundamental science. The most utilized CRS technique has been coherent anti-Stokes Raman scatter…
View article: Understanding quantum processes in semiconductors through the use of selective multidimensional spectroscopy
Understanding quantum processes in semiconductors through the use of selective multidimensional spectroscopy Open
In his thesis entitled, 'Understanding Quantum Processes in Semiconductors Through the Use of Selective Multidimensional Spectroscopy,' Jonathan Tollerud has developed experimental techniques that will be useful for understanding the role …
View article: Intrinsic defect engineering of CVD grown monolayer MoS$_2$ for tuneable functional nanodevices
Intrinsic defect engineering of CVD grown monolayer MoS$_2$ for tuneable functional nanodevices Open
Defects in atomically thin materials can drive new functionalities and expand applications to multifunctional systems that are monolithically integrated. An ability to control formation of defects during the synthesis process is an importa…
View article: Floquet engineering in the presence of optically excited carriers
Floquet engineering in the presence of optically excited carriers Open
Floquet engineering provides an optical means to manipulate electronic bandstructures, however, carriers excited by the pump field can lead to an effective heating, and can obscure measurement of the band changes. A recent demonstration of…
View article: Effects of Floquet Engineering on the Coherent Exciton Dynamics in Monolayer WS$_2$
Effects of Floquet Engineering on the Coherent Exciton Dynamics in Monolayer WS$_2$ Open
Coherent optical manipulation of electronic bandstructures via Floquet Engineering is a promising means to control quantum systems on an ultrafast timescale. However, the ultrafast switching on/off of the driving field comes with questions…
View article: Interactions between Fermi polarons in monolayer WS2
Interactions between Fermi polarons in monolayer WS2 Open
View article: Exciton-polaron interactions in monolayer WS$_2$
Exciton-polaron interactions in monolayer WS$_2$ Open
Interactions between quasiparticles are of fundamental importance and ultimately determine the macroscopic properties of quantum matter. A famous example is the phenomenon of superconductivity, which arises from attractive electron-electro…
View article: Transient measurement of phononic states with covariance-based stochastic spectroscopy
Transient measurement of phononic states with covariance-based stochastic spectroscopy Open
View article: Interactions between Fermi polarons in monolayer WS2: MDCS Data
Interactions between Fermi polarons in monolayer WS2: MDCS Data Open
This is the data underlying the 2D spectra presented in Nature Communications 13, Article number: 6164 (2022). Each sheet corresponds to the relevant figure, as indicated
View article: Direct Measurement of Biexcitons in Monolayer WS2
Direct Measurement of Biexcitons in Monolayer WS2 Open
The optical properties of atomically thin transition metal dichalcogenides (TMDCs) are dominated by Coulomb bound quasi-particles, such as excitons, trions, and biexcitons. Due to the number and density of possible states, attributing diff…
View article: Coherent dynamics of Floquet-Bloch states in monolayer <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:mi mathvariant="normal">W</mml:mi><mml:msub><mml:mi mathvariant="normal">S</mml:mi><mml:mn>2</mml:mn></mml:msub></mml:mrow></mml:math> reveals fast adiabatic switching
Coherent dynamics of Floquet-Bloch states in monolayer reveals fast adiabatic switching Open
Floquet engineering offers a path to optically controlled materials, but experimental implementations have frequently relied on femtosecond pulses to achieve the high peak fields required to maximize light-matter interactions and obtain a …
View article: Time-resolved multimode heterodyne detection for dissecting coherent states of matter
Time-resolved multimode heterodyne detection for dissecting coherent states of matter Open
Unveiling and controlling the time evolution of the momentum and position of low energy excitations such as phonons, magnons, and electronic excitation is the key to attain coherently driven new functionalities of materials. Here we report…
View article: Femtosecond covariance spectroscopy
Femtosecond covariance spectroscopy Open
Significance Here we establish femtosecond covariance spectroscopy as a technique that uses ultrashort stochastic light pulses to measure nonlinear material responses. By using pulses with spectrally uncorrelated fluctuations we can levera…
View article: Femtosecond Covariance Spectroscopy
Femtosecond Covariance Spectroscopy Open
The success of non-linear optics relies largely on pulse-to-pulse consistency. In contrast, covariance based techniques used in photoionization electron spectroscopy and mass spectrometry have shown that wealth of information can be extrac…
View article: Persistent coherent response from dressed excitations in an optimally doped cuprate
Persistent coherent response from dressed excitations in an optimally doped cuprate Open
The detailed nature of the elementary excitations in the cuprates is still debated. While charge-localisation and dressing effects are important in the underdoped region, and Fermi-liquid models work at large dopings, it is difficult to re…
View article: Coherent multi-dimensional spectroscopy: Experimental considerations, direct comparisons and new capabilities
Coherent multi-dimensional spectroscopy: Experimental considerations, direct comparisons and new capabilities Open
View article: Time-Domain THz Spectroscopy Reveals Coupled Protein–Hydration Dielectric Response in Solutions of Native and Fibrils of Human Lysozyme
Time-Domain THz Spectroscopy Reveals Coupled Protein–Hydration Dielectric Response in Solutions of Native and Fibrils of Human Lysozyme Open
Here we reveal details of the interaction between human lysozyme proteins, both native and fibrils, and their water environment by intense terahertz time domain spectroscopy. With the aid of a rigorous dielectric model, we determine the am…
View article: Separating pathways in double‐quantum optical spectroscopy reveals excitonic interactions
Separating pathways in double‐quantum optical spectroscopy reveals excitonic interactions Open
Techniques for coherent multidimensional optical spectroscopy have been developed and utilised to understand many different processes, including energy transfer in photosynthesis and many‐body effects in semiconductor nanostructures. Doubl…
View article: Revealing and Characterizing Dark Excitons through Coherent Multidimensional Spectroscopy
Revealing and Characterizing Dark Excitons through Coherent Multidimensional Spectroscopy Open
Dark excitons are of fundamental importance in a broad range of contexts but are difficult to study using conventional optical spectroscopy due to their weak interaction with light. We show how coherent multidimensional spectroscopy can re…
View article: Optical analogue of 2D heteronuclear double-quantum NMR
Optical analogue of 2D heteronuclear double-quantum NMR Open
Heteronuclear multi-quantum spectroscopy is a powerful part of the NMR toolbox, commonly used to identify specific sequences of atoms in complex pulse sequences designed to determine the structure of complex molecules, including proteins. …
View article: Two-dimensional double-quantum spectroscopy: peak shapes as a sensitive probe of carrier interactions in quantum wells
Two-dimensional double-quantum spectroscopy: peak shapes as a sensitive probe of carrier interactions in quantum wells Open
We identify carrier scattering at densities below that which has previously been observed in semiconductor quantum wells. These effects are evident in the peak shapes of 2D double-quantum spectra, which change as a function of excitation d…