Applied Physics BPub Date : 2026-05-04DOI: 10.1007/s00340-026-08655-8
Brendan Gachot, Cornelia Irimiea, Renaud Jalain, Nicolas Fdida, Xavier Mercier
{"title":"Comparative study of sooting tendencies by laser-induced incandescence in turbulent flames of Jet A-1 and alternative fuel","authors":"Brendan Gachot, Cornelia Irimiea, Renaud Jalain, Nicolas Fdida, Xavier Mercier","doi":"10.1007/s00340-026-08655-8","DOIUrl":"10.1007/s00340-026-08655-8","url":null,"abstract":"<div><p>Three optical configurations of the LII technique: time-resolved, planar, and spectral, were used for a comparative analysis of soot topology, evolution and propensity in turbulent flames of Jet A-1 and Isopar-M. Selected configurations provide insights into particle size evolution, soot filaments topology, their probability of appearance, and soot volume fractions. Jet A-1 flame exhibits higher soot loads with longer decay times, indicating larger and more developed particles. In contrast, the Isopar flame shows weak soot signals with nearly constant decay times, suggesting limited particle growth. According to temporally averaged planar LII, significant differences are observed between both flames, in terms of intensity and spatial distribution. In the Isopar flame, apart from the lower observed signal, the spatial distribution is more homogeneous without a clear maximum, making it impossible to distinguish locations where soot formation or oxidation dominate. 2D LII soot filament intermittency is characterized using statistical image-to-image metrics to evaluate soot filaments topology between the two flames. Spectral measurements revealed the presence of interfering fluorescence and provided a means to infer the soot volume fraction in the Jet A-1 flame. These findings underscore the complexity of soot formation in spray flames and the need for multi-scale, time-resolved measurements to characterize these environments.</p></div>","PeriodicalId":474,"journal":{"name":"Applied Physics B","volume":"132 5","pages":""},"PeriodicalIF":2.0,"publicationDate":"2026-05-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s00340-026-08655-8.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147829700","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Applied Physics BPub Date : 2026-05-04DOI: 10.1007/s00340-026-08678-1
Andrijana Šolajić, Jelena Pešić
{"title":"Strain-driven corrugation in hBN-GaS, -GaSe, and -InS heterostructures","authors":"Andrijana Šolajić, Jelena Pešić","doi":"10.1007/s00340-026-08678-1","DOIUrl":"10.1007/s00340-026-08678-1","url":null,"abstract":"<div><p>Two dimensional group IIIa monochalcogenides are promising two-dimensional semiconductors, known for their high carrier mobility and strong optical absorption in the visible and UV range. When integrated with hexagonal boron nitride (hBN) in van der Waals heterostructures, these materials benefit from the atomically flat and inert nature of hBN, which helps preserve their intrinsic electronic quality and enhances overall device performance. In our previous studies, hBN-based heterostructures with these monolayers exhibited favorable band alignment and optoelectronic characteristics. In this work, we investigate the role of strain in shaping the structural and electronic behavior of hBN/GaS, hBN/GaSe, and hBN/InS heterostructures using first-principles DFT calculations. Contrary to heterostructures previously reported in the literature, these three systems develop a pronounced corrugated geometry as a result of compressive strain and lattice mismatch. We analyze how this strain-induced out-of-plane distortion modifies interlayer coupling, charge redistribution, band structure, and optical absorption spectra.</p></div>","PeriodicalId":474,"journal":{"name":"Applied Physics B","volume":"132 5","pages":""},"PeriodicalIF":2.0,"publicationDate":"2026-05-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s00340-026-08678-1.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147829110","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Applied Physics BPub Date : 2026-04-29DOI: 10.1007/s00340-026-08677-2
Jie Hu, Yu-Zhu Fu, Kun Liu
{"title":"Study on the interference mechanism of strontium-90 radioactive decay","authors":"Jie Hu, Yu-Zhu Fu, Kun Liu","doi":"10.1007/s00340-026-08677-2","DOIUrl":"10.1007/s00340-026-08677-2","url":null,"abstract":"<div>\u0000 \u0000 <p>Tracking the dynamic behavior of electrons produced by the decay of radioactive nuclides is an important and challenging issue. The time-dependent property of laser fields can be used to track the collision and exchange processes between emitted electrons (generated by <sup>90</sup>Sr decay) and electrons in the plasma. It is found that the emitted electrons can contribute to the plasma’s stability. That is to say the emitted electrons can not only serve as supplements to enter the plasma to compensate for the loss of ionized electrons caused by collisions and recombination, but also provide energy to the plasma through collisions with positive ions. This article not only provides the conditions for high-frequency collisions to occur, but also, by analyzing the distribution of collision probability, gives the time when the maximum collision probability occurs, as well as the exact numerical value of plasma energy in a very short period of rapid increase.</p>\u0000 </div>","PeriodicalId":474,"journal":{"name":"Applied Physics B","volume":"132 5","pages":""},"PeriodicalIF":2.0,"publicationDate":"2026-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s00340-026-08677-2.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147796953","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Applied Physics BPub Date : 2026-04-27DOI: 10.1007/s00340-026-08668-3
Chaoyu Wang, Jianping Yin
{"title":"Comparison of Yb3+: YAP with Yb3+: YAG cooling crystals","authors":"Chaoyu Wang, Jianping Yin","doi":"10.1007/s00340-026-08668-3","DOIUrl":"10.1007/s00340-026-08668-3","url":null,"abstract":"<div><p>According to the single-frequency phonon model, the lower phonon energy of YAlO<sub>3</sub> (YAP) compared to Y<sub>3</sub>Al<sub>5</sub>O<sub>12</sub> (YAG) is expected to enable more efficient laser cooling in Yb<sup>3+</sup>-doped YAP. We present the first experimental comparison of anti-Stokes fluorescence cooling in 2% Yb<sup>3+</sup>-doped YAP and YAG crystals. Yb<sup>3+</sup>: YAP exhibits a broader cooling spectral range (1020–1070 nm) than Yb<sup>3+</sup>: YAG (1020–1055 nm). A minimum achievable temperature (MAT) of ~ 249.7 K is obtained for Yb<sup>3+</sup>: YAP at 1040 nm, which is notably lower than that of ~ 259.3 K observed for Yb<sup>3+</sup>: YAG. Further analysis predicts ultimate cooling limits of ~ 167 K for Yb<sup>3+</sup>: YAP and ~ 171 K for Yb<sup>3+</sup>: YAG from room temperature. These findings highlight the superior cooling performance of Yb<sup>3+</sup>: YAP and support its potential application in high-power radiation-balanced lasers (RBLs).</p></div>","PeriodicalId":474,"journal":{"name":"Applied Physics B","volume":"132 5","pages":""},"PeriodicalIF":2.0,"publicationDate":"2026-04-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s00340-026-08668-3.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147796553","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Applied Physics BPub Date : 2026-04-22DOI: 10.1007/s00340-026-08676-3
Raman Kumar, Robert B. Kaufman, Fu-Chen Hsiao, John M. Dallesasse
{"title":"Negative differential resistance, self-oscillations, and light emission in transistor-injected quantum cascade structures","authors":"Raman Kumar, Robert B. Kaufman, Fu-Chen Hsiao, John M. Dallesasse","doi":"10.1007/s00340-026-08676-3","DOIUrl":"10.1007/s00340-026-08676-3","url":null,"abstract":"<div><p>We experimentally demonstrate negative differential resistance, collector current oscillations, and light emission in a transistor-injected quantum cascade structure. Distinct transport regimes are accessed by varying the reverse bias across the base-collector junction while independently controlling emitter injection. The collector current shows pronounced oscillations and alternating high–low levels as the reverse bias changes, indicating quantum transport through the superlattice. Oscillations at a peak frequency of 3.2 MHz occur within high-bias negative differential resistance regions. Spontaneous short-wave infrared (SWIR) emission from the base region is characterized using Fourier transform infrared spectroscopy, revealing a peak wavelength of 1.58 <span>(mu )</span>m. Coupling between the emitted light and superlattice modes is confirmed by SWIR intensity oscillations synchronized with collector current oscillations. Under forward bias of the base-collector junction, the device emits coherent SWIR light at 1.58 <span>(mu )</span>m, aided by carrier confinement from a quantum impedance matching region. Additionally, spontaneous mid-wave infrared emission is observed from the quantum cascade structure. This three-terminal, transistor-injected platform integrates electronic modulation with tunable optical output, showing promise for a versatile alternative to conventional two-terminal quantum cascade devices that could enable new opportunities in long-wavelength photonics for sensing, communication, and spectroscopy applications.</p></div>","PeriodicalId":474,"journal":{"name":"Applied Physics B","volume":"132 5","pages":""},"PeriodicalIF":2.0,"publicationDate":"2026-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s00340-026-08676-3.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147738137","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Applied Physics BPub Date : 2026-04-18DOI: 10.1007/s00340-026-08667-4
Stanko N. Nikolić, Milivoj R. Belić
{"title":"Akhmediev breathers emerging from the white noise: evidence and identification using the peak-height formula","authors":"Stanko N. Nikolić, Milivoj R. Belić","doi":"10.1007/s00340-026-08667-4","DOIUrl":"10.1007/s00340-026-08667-4","url":null,"abstract":"<div>\u0000 \u0000 <p>In this paper, we analyze the dynamical evolution of physical systems governed by the one-dimensional nonlinear Schrödinger equation, with initial conditions modelled by white noise. We show that first- and second-order Akhmediev breathers emerge in numerical simulations from such random initial conditions, demonstrating that these analytical solutions — typically constructed using the Darboux transformation — are intrinsic properties of the equation and can be regarded as its fingerprint. We further investigate this problem by analyzing the statistics of local intensity maxima and show that second-order breather solutions are also clearly visible in probability density histograms over intensity intervals. To determine their properties, we employ the peak-height formula, which enables precise identification of the frequencies of the two commensurate components that nonlinearly form the breather. The method is validated using two distinct intensity peaks obtained in numerical simulations with different algorithms and evolution steps. Finally, we provide a brief analysis explaining why third- and higher-order breather solutions are difficult to generate from white noise, based on weak perturbations of carefully constructed initial conditions derived from analytical solutions.</p>\u0000 </div>","PeriodicalId":474,"journal":{"name":"Applied Physics B","volume":"132 5","pages":""},"PeriodicalIF":2.0,"publicationDate":"2026-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s00340-026-08667-4.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147737834","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Applied Physics BPub Date : 2026-04-17DOI: 10.1007/s00340-026-08675-4
Joseph Rosen
{"title":"Recent advances in spatial light modulator-based three-dimensional optical imaging (invited)","authors":"Joseph Rosen","doi":"10.1007/s00340-026-08675-4","DOIUrl":"10.1007/s00340-026-08675-4","url":null,"abstract":"<div><p>Phase-only spatial light modulators (SLMs) are employed in optical systems for various applications. In this article, the main landmarks of SLM-based imaging systems are surveyed. In addition to conventional two-dimensional imaging, these systems are useful for multidimensional imaging, axial sectioning, field-of-view expansion, improved image resolution, imaging through scatterers, and depth-of-field control. The SLMs in this review are positioned in the system aperture and modulate the input light in various ways to achieve different imaging goals. This review begins with the nearly 20-year-old Fresnel incoherent correlation holography system, continues with coded-aperture holography, and progresses to the most recent versions of interferenceless coded-aperture holography systems.</p></div>","PeriodicalId":474,"journal":{"name":"Applied Physics B","volume":"132 5","pages":""},"PeriodicalIF":2.0,"publicationDate":"2026-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s00340-026-08675-4.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147737805","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Applied Physics BPub Date : 2026-04-11DOI: 10.1007/s00340-026-08633-0
Horace I. Looi, Sarah Jankhani, Michael Pope, Kyle J. Daun
{"title":"In situ measurement of the specific surface area of reduced graphene oxide using time-resolved laser induced incandescence","authors":"Horace I. Looi, Sarah Jankhani, Michael Pope, Kyle J. Daun","doi":"10.1007/s00340-026-08633-0","DOIUrl":"10.1007/s00340-026-08633-0","url":null,"abstract":"<div>\u0000 \u0000 <p>Reduced graphene oxide (rGO) produced by the rapid thermal expansion of graphite oxide is a promising alternative to graphene for applications requiring large volumes and some chemical functionality on the graphene, since this approach offers potentially high yields and throughput. However, the surface area and single layer dispersibility of the resulting rGO powder depends heavily on precursor moisture content, chemistry and morphology, as well as and process parameters that include residence time and quenching rates. While large-scale commercial deployments have been demonstrated, there are currently no real-time diagnostics capable of assessing inline material quality. In this study, we propose time-resolved laser-induced incandescence (TiRe-LII) as a means to derive the real-time relative specific surface area (<i>S</i><sub>sp</sub>) of rGO particles which is expected to be a strong indicator of single sheet dispersibility. The TiRe-LII derived <i>S</i><sub>sp</sub> were found to be consistent in both magnitude and trend to those found through batch gas adsorption measurements analyzed by fitting the Brunauer-Emmett-Teller (BET) isotherm.</p>\u0000 </div>","PeriodicalId":474,"journal":{"name":"Applied Physics B","volume":"132 5","pages":""},"PeriodicalIF":2.0,"publicationDate":"2026-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s00340-026-08633-0.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147642896","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Applied Physics BPub Date : 2026-04-11DOI: 10.1007/s00340-026-08671-8
Ludovica Appignani, Peter Tidemand-Lichtenberg, Lasse Høgstedt, Søren Michael Mørk Friis, Christian Pedersen
{"title":"CW and self-pulsating operation of a Tm:YLF 1.91 μm hemispherical laser","authors":"Ludovica Appignani, Peter Tidemand-Lichtenberg, Lasse Høgstedt, Søren Michael Mørk Friis, Christian Pedersen","doi":"10.1007/s00340-026-08671-8","DOIUrl":"10.1007/s00340-026-08671-8","url":null,"abstract":"<div><p>2 μm lasers are widely employed in LIDAR systems, photomedicine, and as pump sources for OPOs and mid-IR lasers. Tm:YLF is an optimal laser crystal for a 2 μm laser owing to its good mechanical properties, a negative thermo-optic coefficient, and intrinsic birefringence supporting polarized emission. However, many 2 μm lasers have been reported to exhibit unstable operation with a tendency towards self-pulsation (SP). In this paper, we investigate design parameters influencing the temporal output of a compact diode-laser pumped Tm:YLF 1.91 μm laser for stable continuous-wave (CW) and self-pulsating operation. Different sources of perturbation are discussed as main causes for SP. We introduce a novel pulse attenuation parameter, <span>(delta )</span>, to assess laser stability. We report optical-to-optical slope efficiencies of 35% and 41.5% in stable CW and SP operation, respectively.</p></div>","PeriodicalId":474,"journal":{"name":"Applied Physics B","volume":"132 5","pages":""},"PeriodicalIF":2.0,"publicationDate":"2026-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s00340-026-08671-8.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147642895","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Applied Physics BPub Date : 2026-04-09DOI: 10.1007/s00340-026-08669-2
Lyubomir I. Stoyanov, Maria Mincheva, Aleksander Stefanov, Ivan Stefanov, Alexander Dreischuh
{"title":"Single-shot polarization mapping of optical elements introducing spatially varying birefringence","authors":"Lyubomir I. Stoyanov, Maria Mincheva, Aleksander Stefanov, Ivan Stefanov, Alexander Dreischuh","doi":"10.1007/s00340-026-08669-2","DOIUrl":"10.1007/s00340-026-08669-2","url":null,"abstract":"<div>\u0000 \u0000 <p>Polarization mapping plays a key role in modern photonics, as many advanced optical applications, ranging from vector beam engineering to optical communication and material characterization, rely on precise knowledge of spatial polarization distributions. However, conventional mapping techniques often suffer from limitations such as multi-step measurements, sensitivity to misalignment, or the need for bulky setups, making single-shot and high-resolution polarization mapping particularly challenging. Here, we report a single-shot polarization mapping technique for parallel determination of the polarization change introduced by an unknown optical birefringent element or even device (e.g. <i>q</i>-plates, spatial light modulators). To achieve this, we used a 9<span>(times )</span>9 array of linearly polarized probe sub-beams to capture spatially resolved polarization information in a single measurement, allowing the two-dimensional polarization distribution to be reconstructed from just one data acquisition step. In this way, the measurement time is reduced while high spatial resolution is preserved. To demonstrate the robustness of the technique, we present a measurement with commercially available polarizing vortex plates, which convert linearly polarized light into radially or azimuthally polarized light, and the determination of the polarization response of a commercially available spatial light modulator. The main advantage of the method is its simplicity, achieved without sacrificing efficiency, which makes it readily accessible to any laboratory.</p>\u0000 </div>","PeriodicalId":474,"journal":{"name":"Applied Physics B","volume":"132 5","pages":""},"PeriodicalIF":2.0,"publicationDate":"2026-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s00340-026-08669-2.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147642796","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}