Variational methods have been widely used in soft matter physics for both static and dynamic problems. These methods are mostly based on two variational principles: the variational principle of minimum free energy (MF...
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We fabricated a full-dielectric three-dimensional photonic-crystal cavity containing an ultrahigh-mobility two-dimensional electron gas. By applying a strong perpendicular magnetic field, we created Landau polaritons ...
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ISBN:
(数字)9781957171050
ISBN:
(纸本)9781665466660
We fabricated a full-dielectric three-dimensional photonic-crystal cavity containing an ultrahigh-mobility two-dimensional electron gas. By applying a strong perpendicular magnetic field, we created Landau polaritons originating from the ultrastrong coupling of electrons with cavity modes.
Photonic technologies continue to drive the quest for new optical materials with unprecedented responses. A major frontier in this field is the exploration of nonlocal (spatially dispersive) materials, going beyond th...
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A compact broadband Compton spectrometer with high spectral resolution has been designed to detect spectra of laser-driven high-flux gamma *** primary detection range of the gamma-ray spectrum is 0.5 MeV–13 MeV,altho...
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A compact broadband Compton spectrometer with high spectral resolution has been designed to detect spectra of laser-driven high-flux gamma *** primary detection range of the gamma-ray spectrum is 0.5 MeV–13 MeV,although a secondary harder gamma-ray region of 13 MeV–30MeV can also be *** Compton-scattered electrons are spectrally resolved using a curved surface detector and a nonuniform magnetic field produced by a pair of step-like *** design allows a compact structure,a wider bandwidth,especially in the lower-energy region of 0.5 MeV–2 MeV,and optimum spectral *** spectral resolution is 5%–10%in the range 4 MeV–13 MeV and better than 25%in the range 0.5MeV–4MeV(with an Al converter of 0.25mmthickness and a collimator of 1 cm inner diameter).Low-Z plastic materials are used on the inner surface of the spectrometer to suppress noise due to secondary X-ray *** spectrometer can be adjusted flexibly via a specially designed mechanical *** algorithmbased on a regularizationmethod has also been developed to reconstruct the gamma-ray spectrum from the scattered electrons.
Spontaneous symmetry breaking occurs when the underlying laws of a physical system are symmetric, but the vacuum state chosen by the system is not. The (3+1)d 4 theory is relatively simple compared to other more compl...
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Spatial hearing refers to the subjective perceptions of the spatial attributes of sound and is one of the important functions of human hearing. Based on the principles of spatial hearing, virtual auditory displays sim...
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Using the entire data sample of 980 fb−1 collected with the Belle detector at the KEKB asymmetric-energy e+e− collider, we present measurements of the branching fractions of the Cabibbo-favored decays Ξc0→ΛKS0, ...
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Using the entire data sample of 980 fb−1 collected with the Belle detector at the KEKB asymmetric-energy e+e− collider, we present measurements of the branching fractions of the Cabibbo-favored decays Ξc0→ΛKS0, Ξc0→Σ0KS0, and Ξc0→Σ+K−. Taking the decay Ξc0→Ξ−π+ as the normalization mode, we measure the branching fraction ratio B(Ξc0→ΛKS0)/B(Ξc0→Ξ−π+)=0.229±0.008±0.012 with improved precision, and measure the branching fraction ratios B(Ξc0→Σ0KS0)/B(Ξc0→Ξ−π+)=0.038±0.006±0.004 and B(Ξc0→Σ+K−)/B(Ξc0→Ξ−π+)=0.123±0.007±0.010 for the first time. Taking into account the branching fraction of the normalization mode, the absolute branching fractions are determined to be B(Ξc0→ΛKS0)=(3.27±0.11±0.17±0.73)×10−3, B(Ξc0→Σ0KS0)=(0.54±0.09±0.06±0.12)×10−3, and B(Ξc0→Σ+K−)=(1.76±0.10±0.14±0.39)×10−3. The first and second uncertainties above are statistical and systematic, respectively, while the third ones arise from the uncertainty of the branching fraction of Ξc0→Ξ−π+.
We analyzed the surfaces of insulating materials using near-edge X-ray absorption fine structure (NEXAFS) spectroscopy in total-electron-yield (TEY) mode. Conventionally, insulating materials such as glass and ceramic...
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We analyzed the surfaces of insulating materials using near-edge X-ray absorption fine structure (NEXAFS) spectroscopy in total-electron-yield (TEY) mode. Conventionally, insulating materials such as glass and ceramics prepared for NEXAFS analysis by the TEY method are ground and fixed in a sample holder to avoid charging. However, this method is not suitable for analysis of chemically treated surfaces because of surface contamination and changes in the chemical state or structure of the sample. Therefore, by placing a gold mesh on the sample surface, we obtained a normal spectrum without surface contamination and without the effects of charge-up. A comparison with theoretical calculations revealed that OH groups are mainly adsorbed onto the insulator surface exposed to the atmosphere.
Efficient removal of cationic dyes such as methyl blue (MB) is of great importance from the environmental perspective. Although adsorption methods have been employed for this purpose, it is not easy to find inorganic ...
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Nonlinear optical materials possess wide applications, ranging from terahertz and mid-infrared detection to energy harvesting. Recently, the correlations between nonlinear optical responses and topological properties,...
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