Results 41 to 50 of about 63,654 (313)
Optical second harmonic generation in encapsulated single-layer InSe
AIP Advances, 2018 We report the observation of optical second harmonic generation (SHG) in single-layer indium selenide (InSe). We measure a second harmonic signal of > 103 cts/s under nonresonant excitation using a home-built confocal microscope and a standard pulsed ...
Nadine Leisgang +6 more
doaj +1 more source
Super/subradiant second harmonic generation [PDF]
Laser Physics Letters, 2017 A scheme for active second harmonics generation is suggested. The system comprises $N$ three-level atoms in ladder configuration, situated into resonant cavity. It is found that the system can lase in either superradiant or subradiant regime, depending on the number of atoms $N$.
Koganov, Gennady A., Shuker, Reuben
openaire +2 more sources
, 2021 peer reviewedWe report efficient second-harmonic emission by single multilayer metal–dielectric nanocavities. Engineering the intrinsic interface-induced symmetry breaking by resonant optical absorption design, allows to achieve almost two orders of ...
Celebrano, Michele +6 more
core +1 more source
Design and analysis strategies for robust microbiome ageing research
FEBS Letters, EarlyView.The gut microbiome changes with age and associates with age‐related morbidity and mortality, establishing it as a potential biomarker and intervention target for ageing. Realising this potential requires methodological rigour, yet distinguishing biological signals from methodological artefacts remains challenging across cohorts. This review provides an
Mark Olenik +5 more
wiley +1 more source
Frequency comb generation threshold via second-harmonic excitation in χ(2) optical microresonators
APL Photonics, 2020 We investigate the threshold of χ(2) frequency comb generation in lithium niobate whispering gallery microresonators theoretically and experimentally. When generating a frequency comb via second-harmonic excitation, also commonly known as second-harmonic
Jan Szabados +2 more
doaj +1 more source
Efficient Enhancement of Second Harmonic Generation via Noninvasive Modulation
Applied Sciences, 2022 Second harmonic generation has been widely applied in various fields. High second harmonic intensity can facilitate optical imaging, signal sensing, and detection. Thus, enhancing the intensity of the second harmonic is a significant work.
Liqing Wu +3 more
doaj +1 more source
, 2016 In attempts to fabricate thermally stable second-order nonlinear polymer thin films, we have investigated the second harmonic generation (SHG) from both nonlinear polymer and guest-host thin films. We have also investigated the role of capping on the SHG,
Ushasree, P.M. +2 more
core +1 more source
Optical Second Harmonic Generation from Periodic Steps on Rutile TiO_2(110) [PDF]
, 2010 We have succeeded in observing optical second harmonic generation (SHG) from steps on the TiO_2 surfacesadsorbed with HCOOH. The samples were single crystals of rutile TiO_2 with (110), (15 15 4), (13 9 0), and (671)faces.
Watanabe, Ryosuke +2 more
core +1 more source
Molecular Oncology, EarlyView.Tumors contain diverse cellular states whose behavior is shaped by context‐dependent gene coordination. By comparing gene–gene relationships across biological contexts, we identify adaptive transcriptional modules that reorganize into distinct vulnerability axes.
Brian Nelson +9 more
wiley +1 more source
Molecular Oncology, EarlyView.Pre‐analytical handling critically determines liquid biopsy performance. This study defines practical best‐practice conditions for cell‐free DNA (cfDNA) and extracellular vesicle–derived DNA (evDNA), showing how processing time, storage conditions, tube type, and plasma input volume affect DNA integrity and mutation detection.
Jonas Dohmen +11 more
wiley +1 more source