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In this paper a new wave splitting is suggested that simplifies the analysis of wave propagation in reciprocal bi-isotropic media. Two different methods to solve the scattering problem are analyzed; the invariant imbedding and the Green function approach. The medium is modeled by constitutive relations in the time domain (time convolutions) and the slab is assumed to be inhomogeneous with respect

A generalized Green functions technique for wave propagation of transient fields in one-dimensional media is developed. The medium is partitioned into an arbitrary number of subslabs for which Green operators, that map the incident field to the internal fields, are defined. Relations between the Green operators for the entire medium and the Green operators for the subslabs are derived. The techniq

Faculty of Science 2026 | Lund University 1 Education that equips students to solve the challenges of tomorrow 2 Wide range of programmes and courses Stable student base of around 3,000 students, including 1,800 full-time equivalent students. Broad selection of degree programmes. Large number of freestanding courses. Strong emphasis on practical learning through laboratory work and field studies.

https://www.science.lu.se/internal/sites/science.lu.se.internal/files/2026-05/Main_presentation_Faculty_of_Science-May2026.pptx - 2026-07-22

In a previous study we have shown that correction of peripheral refractive errors can improve the remaining vision of subjects with large central visual field loss. Measuring peripheral refractive errors with traditional methods is often difficult due to low visual acuity and large aberrations. Therefore a Hartmann-Shack sensor has been designed to measure peripheral wave front aberrations in subj

As an alternative to traditional top-down techniques for fabrication of one-dimensional devices we here report an approach wherein a bottom-up technique is used to create one-dimensional device structures. We use the vapor-liquid-solid growth method, in which a catalytically active gold nanoparticle forms a eutectic alloy with the nanowire constituents. Our method of growth allows atomically abrup

In this paper a new wave splitting is suggested that simplifies the analysis of wave propagation in reciprocal bi-isotropic media. Two different methods to solve the scattering problem are analyzed: the invariant imbedding and the Green function approach. The medium is modeled by constitutive relations in the time domain (time convolutions) and the slab is assumed to be inhomogeneous with respect

The traveling salesman problem (TSP) is a well-known computationally hard problem often used to benchmark new optimization algorithms. With recent advances in the field of quantum computing, quantum optimization algorithms are emerging as promising new ways to potentially solve such problems that remain difficult for classical computers. However, most modern quantum processing units (QPUs) still l

Gas-phase transmission electron microscopy is an essential tool for elucidating the mechanisms involved in the synthesis of functional materials. Here, we review the latest developments in understanding the growth of novel nanostructural materials afforded by following the process in situ in electron microscopes. Particular focus is on investigations of catalyzed growth of one-dimensional carbon-b

Nano Lund Annual Report 2023 NanoLund ANNUAL REPORT | 2025 2025 in brief CURRENT NUMBERS NANOLUND INCLUDES PUBLICATIONS 23 recipients of European Research Council (ERC) awards 6 Wallenberg Scholars 3 Swedish Research Council Distinguished Professors 15 ongoing EU-projects 3 Vinnova Competence Centres 7 ongoing Wallenberg projects and Research environment grants from the Swedish Research Council 44

https://www.nano.lu.se/sites/nano.lu.se/files/2026-06/NanoLund_AnnualReport2025.pdf - 2026-07-22

Faculty of Social Sciences Do you want to immerse yourself further in a subject you are passionate about while contributing to new knowledge? Doctoral studies offer you the opportunity to do just that, while training you to become an independent and critically thinking researcher with career opportunities both within and beyond academia. About doctoral studiesDoctoral education is the highest leve

https://www.sam.lu.se/en/education/doctoral-studies - 2026-07-21

We present results from two experiments that provide the first quantification of inter-particle force networks in stiff, 3D, opaque granular materials. Force vectors between all grains were determined using a mathematical optimization technique that seeks to satisfy grain equilibrium and strain measurements. Quantities needed in the optimization - the spatial location of the inter-particle contact

The building sector is the largest contributor to greenhouse gas (GHG) emissions, primarily due to two factors: the embodied energy of construction materials and the operational energy consumed over a building’s lifespan. Given this substantial environmental impact, sustainability and climate resilience have become critical priorities in global policy frameworks. Addressing this challenge requires

High-order harmonic generation (HHG) provides scalable sources of coherent extreme ultraviolet radiation with pulse duration down to the attosecond time scale. Efficient HHG requires the constructive interplay between microscopic and macroscopic effects in the generation volume, which can be achieved over a large range of experimental parameters from the driving field properties to those of the ge

Harmonic-structure (HS) design is one of the most efficient in the family of architected gradient-structure materials recently attracting increasing attention in global material science community due to leading structural performance characteristics. This work studies in situ the mechanics of plastic deformation in HS materials on the example of commercially pure nickel (Ni) during uniaxial tensil

Heterogenous bimodal harmonic-structure (HS) materials are interesting because of excellent structural efficiency. In this work, we present a simple yet powerful analytical model allowing to evaluate strain partitioning between coarse- and ultrafine- grain (CG and UFG, respectively) structure components in HS materials and to estimate the magnitude of back-stress forming at their interphases. The

The existence and effect of different rare earth (R2+/3+/IV) ions in SrAl2O4:Eu2+, R3+ and M2MgSi2O7:Eu2+, R3+ (M: Sr, Ba) persistent luminescence materials was studied with XANES (x-ray absorption near edge structure) measurements at HASYLAB/DESY (Hamburg, Germany) and MAX-lab (Lund, Sweden). The experiments were carried out at 298K for selected rare earth (co-) dopants (Eu2+; Ce3+, Nd3+, Sm3+, D