Independent Amplitude and Phase Modulation in Active Transmissive Metasurfaces via Complex Permittivity Tuning

Posted by klaurent Caltech

Kavli Affiliate: Harry Atwater | Summary:Active metasurfaces are a promising platform for spatial light modulators (SLMs) in applications such as holography, beam shaping, and light detection and ranging (LiDAR), as they enable dynamic control over the amplitude and phase of light at subwavelength scales. Among these, transmissive metasurfaces offer a compact alternative to conventional SLMs, […]


Continue.. Independent Amplitude and Phase Modulation in Active Transmissive Metasurfaces via Complex Permittivity Tuning

Parallax Depth Sectioning and 3D Reconstruction in 4D-STEM

Posted by klaurent Cornell

Kavli Affiliate: David Muller | Summary:Three-dimensional (3D) information is encoded in four-dimensional scanning transmission electron microscopy (4D-STEM) through parallax between the virtual images formed at each detector pixel. In this paper we connect the encoding and retrieval of depth-dependent information in 4D-STEM to two other widely-used 3D imaging methods, tomography and light-field photography, and derive […]


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Strongly coupled ultracompressed self-cavity plasmon polaritons at millikelvin temperatures

Posted by klaurent Cornell

Kavli Affiliate: Debanjan Chowdhury | Summary:Van der Waals heterostructures exhibit self-cavity resonances from sub-terahertz to terahertz frequencies and thus offer an attractive route toward realizing cavity-modified phases of matter. Spectroscopy of such systems calls for high frequency resolution at millikelvin temperatures, which is extremely challenging with existing methods. Here we demonstrate a new platform for […]


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Design of Mechanically Compliant Membrane Reflectors for Giant Optical Phase Nonlinearity

Posted by klaurent Caltech

Kavli Affiliate: Harry Atwater | Summary:Optical nonlinearities arise when the response of a photonic system depends on light intensity. Radiation pressure can create such a nonlinearity by moving a mechanically compliant reflector, thereby shifting the phase of the reflected light. Based on measured properties, we predict a giant phase responsivity of 263 rad W$^-1$ and […]


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Geometric Characterization and Feasible Region Analysis of Bipartite Qutrit Bound Entanglement

Posted by klaurent Delft

Kavli Affiliate: Mazhar Ali | Summary: We characterize bound entanglement in bipartite qutrit systems by combining the Positive Partial Transpose (PPT) criterion with a structural, non-completely positive map. Focusing on a comprehensive three-parameter bipartite qutrit family $ρ_a,b,c$, we present an exact analytical and geometric partitioning of the physical state space simplex. We derive the closed-form […]


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Normal-ordered perturbative expansion for matter systems interacting with continuous-mode quantum photon fields

Posted by klaurent Berkeley

Kavli Affiliate: Birgitta Whaley | Summary:We develop a normal-ordered perturbative expansion method to compute the reduced dynamics of a matter system interacting with a general continuous-mode photon field state. In this expansion, all field correlation functions are automatically normal-ordered, while the free evolution is modified by spontaneous emission. Our normal-ordered expansion elucidates the physical meaning […]


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Input-output formulation of quantum light spectroscopy

Posted by klaurent Berkeley

Kavli Affiliate: Birgitta Whaley | Summary:We develop an input-output formulation of quantum light spectroscopy (QLS) by combining the input-output theory, commonly used in quantum optics, with the perturbative expansion method for nonlinear spectroscopy, commonly used in chemical physics. The use of the input-output relation provides physical intuition for how matter systems alter the photon input […]


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De novo minibinders targeting RH5 achieve nanomolar inhibition of blood-stage malaria replication

Posted by dbos Oxford

Kavli Affiliate: Simon DraperJason Hsiao, Melina Shamshoum, Abhiram Chalamalasetty, Jordan R. Barrett, Ricardo Almada-Monter, Elizabeth Tabornal, Emily Wilks, Yi-Zong Lee, Nathan Beutler, Amanda Richard Lukens, Priyan Kapoor, Daisy Chen, Justice Ndihokubwayo, Barnabas G Williams, Kirsty McHugh, David Pulido, Irina Mendes de Sousa, Elizabeth Komives, Emília V. Noormahomed, Ian A. Wilson, Dyann F. Wirth, Thomas Rogers, […]


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Astrometric Evidence for Outer Giant Planets in Known Exoplanet Systems

Posted by klaurent Caltech

Kavli Affiliate: Dimitri Mawet| Summary:Outer giant planets can influence the formation and dynamical evolution of their planetary systems. However, their long orbital periods make them difficult to detect using transit and radial velocity (RV) techniques. Measurements from Hipparcos, Gaia DR2 and DR3 (G23H) can detect the stellar reflex motion induced by distant companions before the […]


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Minor Structural Differences Tune Functional Specialization of Antenna Subunits in the PSII Energy Transfer Network

Posted by klaurent Berkeley

Kavli Affiliate: Graham Fleming | Summary:Photosystem II (PSII) contains a diverse array of pigment-protein subunits with specialized roles in the antenna network. We investigate the functional significance of this subunit diversity in two structurally similar yet functionally distinct PSII subunits: minor light-harvesting complex CP29 and major light-harvesting complex LHCII. We combine two-dimensional electronic-vibrational spectroscopy with […]


Continue.. Minor Structural Differences Tune Functional Specialization of Antenna Subunits in the PSII Energy Transfer Network