Spacetime Imaging of Group and Phase Velocities of Terahertz Surface Plasmon Polaritons in Graphene.

Detecting electromagnetic radiation scattered from a tip-sample junction has enabled overcoming the diffraction limit and started the flourishing field of polariton nanoimaging. However, most techniques only resolve amplitude and relative phase of the scattered radiation. Here, we utilize field-resolved detection of ultrashort scattered pulses to map the dynamics of surface polaritons in both space and time.

A reliability generalization meta-analysis of the internal consistency and test-retest reliability of the pre-sleep arousal scale (PSAS).

Purpose: The Pre-Sleep Arousal Scale (PSAS) is a self-report tool for assessing cognitive and somatic arousal before sleep. While the English version is well-validated, research on translations is limited. This meta-analysis examines PSAS translations' internal consistency and reliability.

Plasmatic variability of direct oral anticoagulants in people with atrial fibrillation and previous gastric surgery: a pilot case series.

Background: Data on cardioembolic prevention with direct oral anticoagulants (DOAC) in atrial fibrillation (AF) patients with previous gastric surgery are lacking. We report inter- and intra-individual differences in DOAC concentration in people with gastric surgery, to identify potential treatment options.

Methods: Patients with previous gastric surgery receiving DOAC for AF as stroke secondary prevention, and undergoing peak-trough DOAC plasmatic testing were selected from the regional EDDIE-AF registry.

Harmonic quantum cascade laser terahertz frequency combs enabled by multilayer graphene top-cavity scatters.

Optical frequency comb synthesizers, operating in the harmonic regime, are metrological sources in which the emitted optical power is concentrated in a few modes, spaced by several multiples of the cavity free spectral range (FSR). This behavior reflects in a large correlation degree and, in principle, in an increased optical power per mode. In miniaturized quantum cascade lasers (QCLs), harmonic frequency combs (HFCs) are hence particularly attracting to explore quantum correlation effects between adjacent harmonic modes, enabled by the inherently large gain media third-order Kerr nonlinearity, even if controlled generation of stable HFCs of predefined order, is typically demanding in such electrically pumped sources.