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Ultrafast electron dynamics in quantum cascade lasers hold enormous potential for the implementation of intense, compact mode-locked terahertz sources, squeezed terahertz light, frequency mixers, and comb-based metrology systems. Yet the important sub-cycle dynamics have been notoriously difficult to access in operational terahertz quantum cascade lasers. Here we show the first field-resolved two-
All-inorganic CsPbI3 perovskite quantum dots (QDs) have attracted intense attention for the application in photovoltaics and optoelectronic applications due to their phase stability and great photoluminescence (PL) properties. However, the their photostability is still to be investigated in detail. In this thesis work, we studied the photostability of the CsPbI3 QDs suspended in hexane and found l
Studies of thermally induced transport in nanostructures provide access to an exciting regime where fluctuations are relevant, enabling the investigation of fundamental thermodynamic concepts and the realization of thermal energy harvesters. We study a serial double quantum dot formed in an InAs/InP nanowire coupled to two electron reservoirs. By means of a specially designed local metallic joule-
Using the eight-band k center dot p model and the Burt-Foreman envelope function theory to perform self-consistent calculations, we have studied the effect of electron-hole hybridization on the cyclotron masses m(*) and the effective g-factors g(*) of two-dimensional quasiparticles in InAs/GaSb quantum wells under a magnetic field applied perpendicular to the interfaces. We can modify the degree o
Fluctuations of thermodynamic observables, such as heat and work, contain relevant information on the underlying physical process. These fluctuations are however not taken into account in the traditional laws of thermodynamics. While the second law is extended to fluctuating systems by the celebrated fluctuation theorems, the first law is generally believed to hold even in the presence of fluctuat
Van der Waals (vdW) magnetic materials are comprised of layers of atomically thin sheets, making them ideal platforms for studying magnetism at the two-dimensional (2D) limit. These materials are at the center of a host of novel types of experiments, however, there are notably few pathways to directly probe their magnetic structure. We confirm the magnetic order within a single crystal of NiPS3 an
The gas in scattering media absorption spectroscopy (GASMAS) technique was used to investigate the possible presence of free gas pores in human condyle bones, extracted from the tibia in knee revision surgical procedures in response to arthrosis development. Following earlier studies showing free gas presence in femoral head bones, decaying because of inadequate blood flow, we investigated condyle
There is a strong desire for short wavelength (~1 Å), short pulsewidth (<100 fs), high-brightness, transverse and longitudinally coherent light pulses for use by the synchrotron radiation community. These requirements exceed the limits achievable by existing, so-called, "third-generation" light sources, such as the Advanced Photon Source (APS) at Argonne National Laboratory (ANL), USA, the Europea
Lund 29 April 2017 Lund University member of the Nordic Centre in India (NCI) Lund University is a member of the Nordic Centre in India (NCI). Scholars and representatives of the member universities have the opportunity to stay at the Director's residence in Delhi. Read more… Sri Lanka Scholarships for foreign students The Government of Sri Lanka is calling for applications for the Presidential Sc
https://www.sasnet.lu.se/sites/sasnet.lu.se/files/lund_29_april_2017.docx - 2026-07-17
We present results on a 404 nm laser system based on second harmonic generation in a new compact external cavity configuration. We obtain a stable 318 mW cw diffraction limited output from the system with a mode-matched pump power of 630 mW. We observe up to 620 mW SHG, when the cavity is operating in scanning mode. The pump source is an external cavity grating feedback tapered diode laser operati
Aim: The role of islet nitric oxide (NO) production in insulin releasing mechanisms is unclear. We examined whether the beneficial effects of the imidazoline derivative RX 871024 (RX) on beta-cell function might be related to perturbations of islet NO production. Methods: Experiments were performed with isolated islets or intact mice challenged with glucose or carbachol with or without RX treatmen
Forskningen inom avdelningen för Elektromagnetism och Nanoelektronik spänner över ett bredd områden från teoretisk elektroteknik och vågutbredning till nanoelektroniska komponenter och system. Tematiskt är forskningsområden indelade i 6 områden: Antenner och vågor, Metamaterial, Nanoelektronik för IoT, neuromorfa elektronik, kvantteknologi, THz och Kraftelektronik. Inom elektromagnetismen läggs s
