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18 Jun 2025 • Journal Article • The Journal of Physical Chemistry Letters
Controlling Intramolecular Vibrational Redistribution with an Infrared Photonic Cavity
AbstractUsing ultrafast dual-frequency two-dimensional infrared spectroscopy (DF-2DIR), we probed how the strong coupling of high-frequency molecular vibrations to surface lattice resonances of infrared antennas, which act as a photonic cavity, affects intramolecular vibrational relaxation (IVR). DF-2DIR allows one to probe the IVR pathways beyond the vibrational state subspace
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16 Jun 2025 • Journal Article • Advanced Intelligent Systems
Ultrathin (<10 nm) Electrochemical Random-Access Memory that Overcomes the Tradeoff between Robust Weight Update and Speed in Neuromorphic Systems
AbstractElectrochemical random-access memory (ECRAM) devices are a promising candidate for neuromorphic computing, as they mimic synaptic functions by modulating conductance through ion migration. However, the use of a thick electrolyte layer (>40 nm) in conventional ECRAMs leads to an unavoidable tradeoff between synaptic weight updates and operating speed. To address this
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20 May 2025 • Journal Article • ACS Applied Optical Materials
Exciton Manipulation via Dielectric Environment Engineering in 2D Semiconductors
AbstractTwo-dimensional (2D) semiconductors are promising for photonic applications due to their exceptional optoelectronic properties, including large exciton binding energy, strong spin–orbit coupling, and potential integration with the standard complementary silicon-oxide-semiconductor (CMOS) technology. The dielectric environment can significantly affect the photoluminescence
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18 May 2025 • Conference Paper • 2025 IEEE International Memory Workshop (IMW)
Novel Ultrafast Non-Destructive Readout of FeRAM by Low-Voltage Transient Current
AbstractConventional FeRAM readout methods are destructive, requiring polarization switching of the FE capacitor (FeCAP) and write-back, which reduces endurance, increases latency, and energy consumption. Prior works on non-destructive readout (NDRO) relied on capacitance memory window (MW), which is slow and requires asymmetric FeCAP structure, compromising retention and
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3 May 2025 • Journal Article • Npj 2D Materials and Applications
Andreev pair injection into a transition metal dichalcogenide monolayer
AbstractWe demonstrate Andreev pair injection across Nb-WS2 junction evident as Andreev reflection in differential conductivity spectra below Nb critical temperature \({T}_{c}\). The superconducting- 2D semiconducting junction defined by a focused ion beam, shaped Nb pads, and semi-dry transfer of single layer CVD-grown WS2 crystals ensured the mechanical integrity of the 2D
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29 Apr 2025 • Preprint • arXiv
Tracking the Evolution of Near-Field Photonic Qubits into High-Dimensional Qudits via State Tomography
AbstractQuantum nanophotonics offers essential tools and technologies for controlling quantum states, while maintaining a miniature form factor and high scalability. For example, nanophotonic platforms can transfer information from the traditional degrees of freedom (DoFs), such as spin angular momentum (SAM) and orbital angular momentum (OAM), to the DoFs of the nanophotonic
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1 Apr 2025 • Journal Article • Advanced Functional Materials
Transient Current Responses of Organic Electrochemical Transistors: Evaluating Ion Diffusion, Chemical Capacitance, and Series Elements
AbstractFor the successful implementation of organic electrochemical transistors in neuromorphic computing, bioelectronics, and real-time sensing applications it is essential to understand the factors that influence device switching times. This work describes a physical-electrochemical model of the transient response to a step of the gate voltage. The model incorporates 1) ion
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Mar 2025 • Journal Article • Advanced Electronic Materials
Magneto-Capacitance of PEDOT:PSS Thin Films; Effects of a Two-Phase System and Coulomb Interaction
AbstractThe study of the net magneto-capacitance, C(B), in thin films of the conducting polymer Poly(3 4-ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS) is presented. In the films there are charged electrically-conducting PEDOT-rich regions surrounded by PSS insulating charged material. The high-conductivity grade PEDOT:PSS thin films are studied at low temperature
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19 Feb 2025 • Journal Article • Nano Letters
Heterostructure Nanoscintillator for Matching Radiation Absorbing Layers with Fast Light-Emitting Layers
AbstractFast-emitting scintillators are essential for advanced diagnostic techniques, yet many suffer from low radiation attenuation. This trade-off is particularly pronounced in polymer scintillators, which, despite their fast emission, exhibit low density and low atomic numbers, limiting the radiation attenuation factor, resulting in low detection efficiency. Here, we overcome
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7 Feb 2025 • Journal Article • Science
Four-dimensional conserved topological charge vectors in plasmonic quasicrystals
AbstractAccording to Noether’s theorem, symmetries in a physical system are intertwined with conserved quantities. These symmetries often determine the system topology, which is made ever more complex with increased dimensionality. Quasicrystals have neither translational nor global rotational symmetry, yet they intrinsically inhabit a higher-dimensional space in which symmetry
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