Abstract Sulfates with a large bandgap are always promising optical candidates. However, due to insufficient birefringence, their applications restricted. Here, in terms of this deficiency, two strategies proposed rationally modulate the anisotropy sulfates by cations and anions, respectively. For cation modulation, [C(NH 2 ) 3 ]Al(SO 4 ·6H O crystal is investigated, which exhibits an unprecedented birefringence (0.098 @ 546 nm) compared other deep‐ultraviolet transparent sulfates, resulting...

Abstract Since the study of short‐wave ultraviolet nonlinear optical crystals based on quasi‐phase‐matching principle will effectively expand development field materials, it is urgent to achieve their directional design. Here, proposed and implemented account hexagonal wurtzite structure. Thus, LiRbSeO 4 crystal obtained with [SeO ] groups as main tetrahedra [LiO separation. It exhibits a wide transparency window (0.22–5.57 µm) an excellent effect (≈1.7 × KH 2 PO ), which originates from...

Abstract Nonlinear optical (NLO) crystals that can generate deep‐ultraviolet (DUV) lasers by the frequency conversion processes play an important role in many basic and frontier research fields. Tetrahedron‐based NLO crystals, which are decent DUV candidates, always exhibit a large transparency window. However, their insufficient birefringence often makes it difficult to satisfy phase matching condition or even UV region. Therefore, some strategies put forward improve ability of...

With the complications of modern agricultural production, how to formulate scientific and reasonable planting strategies in limited land resources highly uncertain market environment has become a key research topic field. The diversity types (such as terraced fields, sloping irrigated land) variety crops North China make problem optimization more complicated practical. In this paper, bi-level model combining mixed integer programming (MIP) stochastic (SP) is proposed solve problems resource...

ABSTRACT Li‐O 2 batteries with an ultrahigh theoretical energy density of up to 3500 W·h/kg have drawn extensive attention as future storage technologies. However, large discharge/charge overpotentials (> 1 V) and unsatisfactory cycling performance are the main obstacles for practical applications. Recently, integrating photocatalysis into has emerged a promising method mitigate overpotentials, but rational design photocathodes excellent photoelectrochemical activity stability remains...

Abstract Deep‐ultraviolet lasers play an important role in many scientific and technical fields, the generation of which by means nonlinear optical frequency conversion technology attracted immense research interest over past few decades. Up to now, there are crystals, except KBe 2 BO 3 F , could produce deep‐ultraviolet coherent light a harmonic process. However, industrialization is hampered its layering growth habit weak interlayer force. Here, new crystal, Mg B 7 O 13 Cl, found, will be...

M2B5O9X is a prominent family with excellent nonlinear optical (NLO) responses, just as the Pb2B5O9I crystal large second harmonic generation (SHG) of 13.5 times that KH2PO4. However, most these compounds are limited to ultraviolet and visible regions because their long absorption edge (small band gap). Here, we report two members this family, which change situation. Using high-temperature solution method, obtain Ca2B5O9Cl Sr2B5O9Cl crystals, exhibit deep-ultraviolet (DUV) 170 nm (band gap ≈...

Parkinson's disease (PD) is a debilitating neurodegenerative disease, with current treatments primarily focusing on improving dopaminergic activity, providing symptomatic relief but failing to halt progression. Ferroptosis drives PD pathogenesis and potential therapeutic target. Herein, we introduce novel peroxide-activated carbon monoxide (CO) donor, PCOD, featuring streamlined structure designed potentially enhance blood-brain barrier (BBB) penetration optimize outcomes. PCOD releases CO...

Pb(Mg1∕3Nb2∕3)O3-PbTiO3 (PMN-PT) crystals exhibit significant potential for applications in the electro-optical (EO) field, owing to their low half-wave voltage and high electro-optic coefficients, ease of miniaturization, integration. However, ferroelectric phase PMN-PT a extinction ratio due light scattering reflection by domain walls. In this study, high-transmittance paraelectric were synthesized through compositional optimization rare-earth ion doping. The optical Kerr properties...

Abstract At present, only KBe 2 BO 3 F (KBBF) can effectively realize a deep‐ultraviolet (DUV) coherent output, while the layered growth habit seriously hinders its application. Here, new design strategy with an optimized KBBF‐like structure based on quasi‐phase matching principle is proposed. Thus, first ferroelectric, Li KRb(SO 4 ) , designed. It exhibits short DUV absorption cutoff edge of 163 nm, large nonlinear optical (NLO) effect 1.7 × KH PO under 1064 nm laser, and typical...

Abstract Pb(Zr 1− x Ti )O 3 (PZT) ceramics are the most widely used piezoelectric due to their excellent performance. It has been reported that direct current poling (DCP) apply on alternating (ACP) relaxor‐PbTiO ferroelectric crystals can further improve properties. Herein, we report dielectric and properties of soft‐PZT5 under DCP, ACP, ACP + DCP methods. The coefficient d 33 was 560 pC/N using ACP+DCP at room temperature (RT), which is 4% higher than ACP‐treated sample (540 pC/N) 24%...

Abstract As for tetrahedron‐based ultraviolet nonlinear optical crystals, it is so difficult to achieve a sufficient birefringence satisfy the phase‐matching condition. Thereover, necessary greatly increase polarizability anisotropy of tetrahedra. Meanwhile, tetrahedra should be arranged as uniformly possible. Based on these ideas, new strategy that dimerizes heteroleptic with atoms bridges proposed and implemented, resulting in compound, Na 2 S 3 O 6 , which crystallizes centrosymmetric...

The Pb(Mg1/3Nb2/3)O3-PbTiO3 (PMN-PT) ferroelectric single crystals have been commercially available as important components in medical ultrasound transducers due to their excellent piezoelectric and electromechanical coupling performance. variation dielectric properties of PMN-PT with ambient temperature is an application indicator. In this work, the after direct current poling (DCP) alternating (ACP) were subjected cyclic thermal treatment process. cycling stability microstructural changes...

Abstract Nonlinear optical crystals with ferroelectricity, which could realize ultraviolet/deep‐ultraviolet coherent output by the quasiphase matching technology, are expected to be promising candidates for new type of nonlinear materials. Here, a borosilicate crystal, LaBSiO 5 , is found, superior famous commercial crystals, LiNbO 3 KTiOPO 4 and LaBGeO in performances. crystal exhibits excellent electrical properties, including short absorption cutoff (186 nm), moderate second‐harmonic...

A LD end-pumped acoustic-optic Q-switched intracavity frequency-doubled Nd:YVO4 laser was demonstrated. It uses a high gray-tracking resistance KTP crystal as nonlinear optical crystal. The output characteristics of 532 nm green using different doping concentrations and cavity configurations were investigated. With the pump power 27.5 W, maximum average 13 W at achieved pulse repetition rate 80 kHz, corresponding to optical-to-optical efficiency 47.3%. width is 30 ns single energy up 162.5...

The alternating current poling (ACP) method has been become more and popular recently because of its advantages being low cost, time saving highly efficient. Few ACP studies have focused on relaxor-PT crystals with a high coercive field Curie temperature or the effects intrinsic extrinsic contributions. electric field, frequency, number cycles piezoelectric dielectric properties 〈001〉-oriented Pb(In0.5Nb0.5)O3-PbTiO3 ferroelectric were studied. permittivity ε 33 T /ε 0 coefficient d an...

The electrostriction effect is widely present in insulators and dielectrics as a secondary of the electric fields. It offers distinct advantages over strain caused by piezoelectric effects, such hysteresis-free residual strain, high sensitivity, rapid response capabilities. phenomenon has found widespread application transducer technology. Pb(Mg1/3Nb2/3)O3 (PMN) typical electrostrictive material. Here, properties PMN-based single crystals were investigated. coefficient designed adjustment...