ADVANCED MATERIALS
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2024
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IF 27.4
Yue Zhao,Shujie Jiao,Song Yang,Yiyin Nie,Yajie Han,Junjie He,Chenyang Tao,Dongbo Wang,Shiyong Gao,Jinzhong Wang,Liancheng Zhao
As the focus on information security continues to intensify, encrypted imaging sensing technology becomes increasingly indispensable. However, the widespread application of encrypted imaging sensing technology is hindered by high manufacturing costs and complex system construction. Herein, an all-inorganic perovskite/perovskite tandem self-powered photodetector (PDs) is reported, incorporated with Bi 2 TeO 6 layer to enahnce dual pyro-phototronic effect, to realize an innovated encryption imaging sensing system with programmable logic gate. The PDs reach responsivity of 1.46 A W −1 and detectivity of 3.44 × 10 13 Jones, the corresponding EQE reaches 342%, which is ≈75.48 times greater than that without pyro-phototronic effect. The outstanding performance resulting from dual pyro-phototronic effect in Cs 2 PbI 2 Cl 2 perovskite and Bi 2 TeO 6 /CsSn 0.5 Pb 0.5 IBr 2 interface, and optimizing band arrangement from the oxidized Bi 2 TeO 6 layer. The photovoltaic and pyro-phototronic signal of PDs can still be clearly distinguished under 8 kHz pulsed laser. More importantly, the encryption imaging sensing system achieves simultaneous outputs of triple image information, and their programmable optoelectronic logic gate can execute six distinct logical functions, including “OR”, “AND”, “XOR”, “NAND”, “NOR” and “XNOR”. This research not only provides a feasible strategy for realizing the outstanding pyro-phototronic effect of all-inorganic perovskite materials, but also presents novel insights for designing encrypted imaging sensing technology.
研究领域:
材料科学
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光学工程
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信息加密技术
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2025
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IF 6.3
Qian Zhang,Zhuolin Guo,Tuo Li,Beijia Zhao,Jun Dong
Here, we investigate the third-order nonlinear optical (NLO) response of the phenol red (PR) dye solution under cw excitation at 532 nm employing the spatial self-phase modulation (SSPM) method. The results show that two types of diffraction rings (narrow and wide) are produced in the far field , which are attributed to the Kerr effect and Thermal optical nonlinear effect . In addition, the NLO properties of the PR dye under various pH conditions are investigated. Compared with the PR dye solution, the nonlinear refractive index coefficients induced by Kerr effect and Thermal optical nonlinear effect of protonated-PR (P-PR) dye increased by 2.23 and 2.76 times, respectively. These phenomena are explained by the enhanced π-electron delocalization, and the redshift and enhancement of the absorption peak caused by π-π* transitions. Finally, all-optical switching in the PR dye solution is realized based on the Thermal optical nonlinear effect. These findings not only provide a significant reference to tailor nonlinear optical properties of PR dye solutions, but also make PR dye promising candidates in photonic devices applications.
研究领域:
光学材料
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光子学
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非线性光学
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分子光谱学
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功能染料化学
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产品关联
DOI
高影响因子
OPTICAL MATERIALS
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2014
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IF 2.075
Fengxian Qiu,Caihong Chen,Qiaolan Zhou,Zhijuan Cao,Guorong Cao,Yijun Guan,Dongya Yang
A chromophore molecule 4-[(benzothiazole-2-yl)diazenyl]phenyl-1,3-diamine (BTPD) was prepared with 2-amino benzothiazole and m -phenylenediamine by diazo-coupling reaction. Then, the BTPD was polymerized with polyether polyol (NJ-220) and isophorone diisocyanate (IPDI) to obtain novel azo benzothiazole polyurethane-urea (BTPUU). The chemical structures of BTPD and BTPUU were characterized by FT-IR and UV–visible spectroscopy. The thermal and mechanical properties of BTPUU film were investigated. The refractive index and transmission loss of BTPUU film were measured at different temperatures and different laser wavelengths (532 nm, 650 nm and 850 nm) by an attenuated total reflection (ATR) technique and CCD digital imaging devices. The thermo-optic coefficients of BTPUU are −4.7086 × 10 − 4 °C − 1 (532 nm), −6.5257 × 10 − 4 °C −1 (650 nm) and −5.1029 × 10 − 4 °C −1 (850 nm), respectively. A Y-branch switch and Mach–Zehnder interferometer (MZI) thermo-optic switches based on thermo-optic effect were proposed and the performances of the switches were simulated, respectively. The results show that the power consumption of the Y-branch thermo-optic switch is only 3.28 mW. The response times of Y-branch and MZI switches are 8.0 ms and 2.0 ms, respectively. The results indicate that the prepared BTPUU has high potential for the applications of the Y-branch digital optical switch (DOS), MZI thermo-optic switch, directional coupler (DC) switch and optical modulators.
研究领域:
材料科学
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光学工程
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产品关联
DOI
高影响因子
IEEE SENSORS JOURNAL
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2024
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IF 4.3
Tingkuo Chen,Haiming Jiang,Kang Xie,Hongyan Xia
This study aims to develop an advanced glucose sensor based on Single-mode fiber - No-core fiber -Single-mode fiber (SMF-NCF-SMF) microfibers modified with glucose oxidase (GOD) for accurate and simultaneous measurement of glucose concentration and temperature, which could significantly enhance diagnostic capabilities in medical and biological applications. The sensor utilizes the evanescent wave principle to detect glucose concentration and the thermal optical effect to measure temperature. Experimental results demonstrate a concentration sensitivity of 2.07 nm/(mg/mL) within the range of 0-3 mg/mL and a temperature sensitivity of -0.35 nm/°C within the range of 25-50°C. These findings highlight the distinct impacts of concentration and temperature on the interference wavelength. By establishing a demodulation matrix, the sensitivities for both concentration and temperature can be separately determined. In-situ temperature monitoring not only eliminates temperature interference but also ensures that GOD remains at its optimal temperature for maximum activity, thereby enhancing the sensitivity and accuracy of glucose concentration detection. Given its high sensitivity, accuracy, and simplicity, this sensor shows promising potential for widespread use in disease diagnosis and biological detection, paving the way for more advanced diagnostic technologies.
研究领域:
生物医学工程
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光学传感
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医疗诊断
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生物技术
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）