Electrical and optical properties of Nd3+-doped rhombohedral Pb(Mg1/3Nb2/3)O3–PbTiO3 ferroelectric single crystal

Dy/Sr‐codoped (K0.5Na0.5)NbO3 multifunctional transparent‐ferroelectric ceramics with adjustable white‐light emission

“…The broad and diffuse T O‐T peaks suggest that the samples undergo phase transition between O and T phases in a wide temperature range (e.g., from room temperature to 200°C), which is consistent with the refined XRD result that O and T phases may coexist at room temperature. Furthermore, due to the presence of diffuse phase transition at T c in the ceramics, the modified Curie–Weiss law is used to describe diffuseness of phase transition: $$$$\begin{equation}\frac{{\mathrm{1}}}{{{\varepsilon }_{\mathrm{r}}}}\ - \ \frac{{\mathrm{1}}}{{{\varepsilon }_{\mathrm{m}}}}\ = \ {{\mathrm{(}}T - {T}_{\mathrm{m}}{\mathrm{)}}}^{{{\gamma}}/{\mathrm{C}}}\end{equation}$$$$where C is a constant, ε r is dielectric constant, T m is the temperature at which ε r reaches a maximum, and ε m is the maximum value of ε r at T m 33,34 . Moreover, the dispersion factor (γ) is in the range between 1 (a normal ferroelectric) and 2 (an ideal relaxor ferroelectric), which can be obtained by fitting the function between ln( ε r − ε m ) and ln( T − T m ).…”

“…where C is a constant, ε r is dielectric constant, T m is the temperature at which ε r reaches a maximum, and ε m is the maximum value of ε r at T m . 33,34 Moreover, the dispersion factor (γ) is in the range between 1 (a normal ferroelectric) and 2 (an ideal relaxor ferroelectric), which can be obtained by fitting the function between ln(ε r − ε m ) and ln(T − T m ). The fitting results are shown in Figure 8E, giving the γ values of 1.21 (x = 0.25), 1.23 (x = 0.5), 1.51 (x = 0.75), and 1.27 (x = 1).…”

Phase transition monitoring and temperature sensing via FIR technology in Bi/Sm‐codoped KNN transparent ceramics

“…Luminescent materials have gained extensive application prospects in display lighting, anticounterfeiting, optical information storage, temperature sensing, and other fields on account of their particular optical properties. [1][2][3][4][5] Thereinto, optical temperature sensors via fluorescence intensity ratio (FIR) are rapidly developed, which is not susceptible to external interference in measurement, enriching the temperature measurement technology that holds significant implications on human daily life as well as scientific inquiry. [6][7][8][9] Moreover, FIR optical temperature sensors that exhibit multiple advantages of simple operation, fast response speed and high spatial resolution possess apparent preponderance over traditional temperature measuring technology, conducive to the harsh working environment and remote temperature monitoring applications.…”

“…Luminescent materials have gained extensive application prospects in display lighting, anticounterfeiting, optical information storage, temperature sensing, and other fields on account of their particular optical properties 1–5 . Thereinto, optical temperature sensors via fluorescence intensity ratio (FIR) are rapidly developed, which is not susceptible to external interference in measurement, enriching the temperature measurement technology that holds significant implications on human daily life as well as scientific inquiry 6–9 .…”

Multiple Bound State Soliton Pulses in the All Polarization Maintaining Fiber Laser

“…Moreover, the bound state pulses obtained in this way often acquired only one state or were accompanied by a tunable center wavelength [ 21 ]. In recent years, extensive research has been conducted on photonic crystals [ 22 , 23 , 24 ], and the tunability of lasers has been successfully achieved by using SWCNT [ 25 ]. Inspired by these significant advancements, our study aimed to explore the potential of combining zeolite photonic crystals with carbon nanotubes.…”