排序方式: 共有14条查询结果,搜索用时 15 毫秒
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介绍了新颖的纳米结构亚波长光学器件的特点,从器件的基本功能特性和工作机理两个方面详细讨论了其应用状况,并阐述了纳米制造技术对亚波长光学器件发展的重要推动作用及这一领域今后的研究热点。 相似文献
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利用禁带理论、等效介质理论分析了增透机理,研究了一种参数设计方法.采用FDTD方法计算了表面覆盖ITO层的六角排列圆形光子晶体出光效率.计算该结构参数的光子晶体的LED出光效率,结果表明加入ITO层的光子晶体能提高GaN基蓝光LED出光效率2倍,该参数设计思路也为光子晶体设计提供了参考依据. 相似文献
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Enhancement of light extraction efficiency in OLED with two-dimensional photonic crystal slabs 总被引:1,自引:0,他引:1
Light extraction efficiency of organic light emitting diode (OLED) based on various photonic crystal slab (PCS) structures was studied. By using the finite-difference time-domain (FDTD) method, we investigated the effect of several parameters, including filling factor and lattice constant, on the enhancement of light extraction efficiency of three basic PCSs, and got the most effective one. Two novel designs of "interlaced" and "double-interlaced" PCS structures based on the most effective basic PCS structure were introduced, and the "interlaced" one was proved to be even more efficient than its prototype. Large enhancement of light extraction efficiency resulted from the coupling to leaky modes in the expended light cone of a band structure, the diffraction in the space between columns, as well as the strong scattering at indium-tin-oxide/glass interfaces. 相似文献
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This paper demonstrates a new process of the photolithography technology,used to fabricate simply fine patterns,by employing surface plasmon character.The sub-wavelength periodic silica structures with uniform silver film are used as the exposure mask.According to the traditional semiconductor process,the grating structures are fabricated at exposing wavelength of 436 nm.At the same time,it provides additional and quantitative support of this technique based on the finite-difference time-domain method.The results of the research show that surface plasmon characteristics of metals can be used to increase the optical field energy distribution differences through the silica structures with silver film,which directly impact on the exposure of following photosensitive layer in different regions. 相似文献
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A far-field optical lithography is developed in this
paper. By designing the structure of a far-field optical superlens,
lithographical resolution can be improved by using a
conventional UV light source. The finite different time domain
numerical studies indicate that the lithographic resolution at 50~nm
line width is achievable with the structure shown in this paper by
using 365~nm wavelength light, and the light can be transferred to a
far distance in the photoresist. 相似文献
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High Sensitivity Transmission-Type SPR Sensor by Using Metallic--Dielectric Mixed Gratings 下载免费PDF全文
We theoretically investigate transmission-type SPR sensors with novel metallic-dielectric mixed gratings by rig- orous coupled-wave analysis (RCWA), compared to the conventional dielectric gratings based structure. It is found that the transmittance efficiency and the full width at half-maximum (FWHM) of the transmission curve can be modulated by increasing or decreasing the metallic part. Therefore, appropriate proportion of metal part will induce enhancement factor of sensor merit. Furthermore, this novel structure will also bring enhancement of resonant angle shift, which can be explained by plasmonie interpretation based on a surface limited increase of interaction area and excitation of localized surface plasmons (LSPs). The proposed configuration has a wide range of potential applications not only as sensor but also other optical devices. 相似文献
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将CdSe/ZnSe/ZnS量子点掺入到聚甲基丙烯酸甲酯(PMMA)中,研究了量子点的发光下转移特性。将420 nm长波滤光片盖在单晶电池上,使电池对300~420 nm波段光谱响应几乎为零,同时排除下转移层抗反射效应的影响,再在滤光片表面制备下转移层,观察到了外量子效率(EQE)值的提升,说明所用量子点可以应用于对300~420 nm波段光谱响应几乎为零的电池上实现频率的下转移,提高EQE。对量子点在太阳能电池中应用的可能性进行了分析,并根据本实验中测得电池的EQE数据,计算了该电池获得提升所需量子点最低的整体荧光量子效率值为87.8%。 相似文献
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硅薄膜太阳能电池背部反射结构设计 总被引:3,自引:0,他引:3
设计了一种新型叠层光栅结构的晶体硅薄膜太阳能电池底部反射器,它由分布布拉格反射器(Distributed Bragg Reflectors,DBR)和衍射光栅两部分组成.利用严格耦合波分析(Rigorous Coupled Wave Analysis,RCWA)方法和模式传输线理论(Modal Transmission Line,MTL),对DBR和光栅进行优化设计,使该叠层光栅结构在800~1 100 nm波长范围内能高效反射入射光并得到大倾斜角的反射光,有效延长光子在电池体区的传播路径,使其被充分吸收.结果表明,四层Si/SiO_2 DBR的反射率可达99.95%,零级衍射序被有效抑制,并得到具有较大倾斜角的±1级衍射序,太阳能电池的捕光能力大大提高. 相似文献
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