RSC Advances
·
2015
·Vol. 6
·期 4
·3224-3230
·
IF 3.84
Yang Zheng,Changming Chen,Yunlong Gu,Jihou Wang,Shouzhuo Yang,Xu Fei,Xibin Wang,Yunji Yi,Xiaoqiang Sun,Fei Wang,Daming Zhang
In this study, a metal-cladding directly defined active waveguide technique is proposed. Optical waveguide amplifiers and thermo-optic (TO) waveguide switches based on erbium-containing polymer are designed and fabricated using this technique. The Er organic complexes containing polymeric reactivity groups are synthesized and investigated by free radical copolymerization. Optical characteristics and thermal stabilities of the active polymer are analyzed. Relative optical gain of the amplifier at 1530 nm is obtained as 3.6 dB. The rise and fall response time of the TO switch applied by 300 Hz square-wave voltage is measured as 511.7 μs and 341.5 μs, respectively. The power-time product is 12.5 mW ms and the extinction ratio is about 20 dB. The technique is very suitable for realizing large-scale optoelectronic integrated circuits.
研究领域:
光学
·
材料科学
✓ 已验证
DOI
高影响因子
APPLIED OPTICS
·
2020
·Vol. 59
·期 35
·11070-11075
·
IF 1.961
Yaoyao Yin,Meng Wang,Tian Xu,Cheng Yin,Yonglong Jin
Different from ordinary planar waveguide structure, we designed a double-metal-cladding waveguide (DMCW) for easier light coupling into the guiding layer from free space. In contrast to evanescent waves in a surface plasmon polariton waveguide, an oscillating wave is generated in the guiding layer. and a similar Fabry–Perot (FP) cavity can be formed by the DMCW. In past work, the FP cavity excited by the DMCW was used to study the refractive index of light, while in this work, the FP cavity is used to excite the photothermal effect of the metal substrate. It is a good connection between light and heat. The photothermal effect is investigated to promote the galvanic replacement reaction in the substrate. Although the experiment process is destructive to the DMCW structure, a surface-enhanced Raman scattering (SERS) chip is prepared on the basis of the photothermal effect in the DMCW. It shows that the DMCW can convert the energy of incident light into thermal energy, and then prepare the SERS chip. The chip has better uniformity, stronger activity, and higher sensitivity. The results demonstrate that the morphology of the SERS substrate created via the DMCW is far more elaborate than that via the surface plasmon polariton waveguide.
研究领域:
光学
·
材料科学
·
纳米技术
✓ 已验证
DOI
PubMed
高影响因子
Journal of Physical Chemistry C
·
2017
·
IF 4.536
Xiumei Wan,Dan-feng Lu,Ran Gao,Jin Cheng,Zhi-mei Qi
A metal-clad optical waveguide sensor based on guided-mode resonance spectroscopy has been developed using a mesoporous TiO2 film as the chemical-sensitive core layer. The sol–gel block copolymer templated mesoporous TiO2 films are ∼275 nm thick, supporting both the transverse electric (TE) and transverse magnetic (TM) modes and thus providing the sensor with the TE- and TM-related dual sensitivities. Both the TE- and TM-mode resonance wavelengths (λR) at the same incident angle were obtained by broadband attenuated total reflection spectroscopy. The film porosity was determined to be ∼0.535 by using the combination of Fresnel formula and Bruggeman approximation to fit the measured values of λR. The TE- and TM-related sensitivities of the sensor to the two analytes of elaidic acid (EA) and Cr6+ were measured at the same incident angle. For each analyte, the TM-related sensitivity is higher than that with the TE-related one. The two sensitivities can be calibrated with each other. Moreover, by adjusting the block copolymer concentration in the coating solution, the mesoporous TiO2 films with different porosities were prepared for investigating the porosity dependence of the sensor’s sensitivity. The findings indicate that a larger-porosity TiO2 film can lead to higher sensitivity. The work demonstrated that the metal-clad mesoporous TiO2 film-based guided-mode resonance sensor is advantageous over a conventional SPR sensor for in situ detection of small molecules.
研究领域:
光学传感
·
材料科学
·
分析化学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED OPTICS
·
2024
·Vol. 63
·期 24
·6314-6321
·
IF 1.7
Yutian Liu,Junjie Yang,Yanbin Chen,Qianliu Yin,Rui Shen,Zixiang Dai,Qianyi Jiao,Zhicheng Sui,Tian Xu
Metal nanoparticles or periodic metal nanostructures exhibit localized surface plasmon resonance (LSPR) effects, widely employed in photovoltaic devices to enhance the light absorption. In this study, we used a double-metal-cladding waveguide (DMCW) structure to fabricate hexagonal metal nanostructures on the front side of the indium tin oxide (ITO) glass, positioned away from the incident light direction. We then prepared perovskite solar cells under various reaction conditions. The analysis results indicate that the metal nanostructure chip excites near-field coupling, generating strong localized fields, and enhances the light absorption through the LSPR effect. The perovskite solar cells (PSCs) with the chip structures exhibited a significant increase in short-circuit current density (${\rm J}_{\rm SC}$) and fill factor (FF), accompanied by a decrease in dark current, indicating improved photovoltaic characteristics of the cells. Altering the evaporative deposition time of the silver film and the concentration of the reaction solution led to a 12.79% increase in the power conversion efficiency (PCE) of the PSCs.
研究领域:
材料科学
·
光电子学
·
能源科学
✓ 已验证
DOI
高影响因子
OPTICAL MATERIALS
·
2022
·
IF 3.754
Yu Wang,Jie Tang,Cong Peng,Meifeng Xu,Lei Zhang,Chaonan Wang,Yonglong Jin,Tian Xu
Local surface plasmon resonance (LSPR) based on metal nanostructures was widely used in enhanced light capture and light absorption . In addition, LSPR can also facilitate processes such as exciton dissociation and charge transfer (CT) in solar cells. We developed perovskite solar cells (PSCs) by coating chips with hexagon-like nanostructures on the backside of Indium tin oxide (ITO) conductive glass using the double metal cladding waveguide (DMCW) technology. The optical absorption and photoelectric conversion efficiency (PCE) of the PSCs with different morphologies of chips were analyzed. The LSPR of the chips corresponded with the absorption capacity of perovskite . LSPR enhanced the scattering, gathering, and capture of light energy . Because the strong absorption rates at the long wavelengths after 600 nm in the ultraviolet visible (UV–Vis) spectrum, the properties of PSCs with the chips are improved. The PCE and short circuit current density (J sc ) increased by 27.21%, and 6.78%, respectively, attributed to the increase in the optical path of incident light and the light absorption capacity of the active layer.
研究领域:
材料科学
·
光子学
·
太阳能
·
纳米技术
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）