我校结合培育博士在《Photonics Research》上发布最新研讨效果-万博电竞

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我校结合培育博士在《Photonics Research》上发布最新研讨效果

公布日期:2019-11-25  来路:   检查:次

克日,由我校特聘院士姚建铨、光电工程学院梁兰菊传授配合指点的博士张璋在太赫兹调制器方面的研讨任务获得新停顿,相干效果发布在国际期刊《Photonics Research》上(SCI一区,top期刊,影响因子5.52)。姚建铨院士、梁兰菊传授为文章的配合通讯著作人,结合培育博士张璋为第一著作人。

团队提出了一种微流集成超构资料,并应用差别浓度的无机液体完成对太赫兹波的自动调控。该构造中无机液体作为水分子载体,将水对太赫兹波的耗尽作用与超构资料对太赫兹波的共振呼应平行地联合在一同,对太赫兹波完成自动调控。实行后果标明,设计的微流集成超构资料在3THz处的调制深度靠近90%,相移超越210o。同时该器件还展示出较好的慢光调制效应。这项任务作为太赫兹液体光子学的一局部,重点突出了太赫兹调制器件中水的可应用性,为研讨太赫兹波-液体互相作用和开辟有源太赫兹光子学提供了另一种办法。

上述研讨效果失掉了国度重点研发方案项目(2017YFA0700202)、国度天然迷信基金(61701434, 61735010)、山东省天然迷信基金(ZR2017MF005,ZR2018LF001 )、枣庄市自主创新及效果转化项目基金(2016GH19)、光电信息技能重点实行室开放基金,教诲部重点实行室(天津大学)的赞助。

Fig. 1. (a) Schematic of MIMs platform with liquid flowing through from the inlet to the outlet under the irradiation of Ey-polarized THz waves; (b) tri-layer structure of the MIMs platform; (c) photograph of real MIMs device; the clamp and screws are used to package the layer materials and the soft pipes to guide the fluids. (d) Optical microscopy image of fabricated SRRs in a certain region; (e) geometric configuration of SRRs.

Fig. 2. (a) Measured THz transmission spectra for the MIMs sample showing the modulation of resonant peaks with varying water content from 0% to 100%; (b) corresponding simulation spectra, whereby the increasing water content levels are represented by an increasing water-layer thickness together with the enhancement of IPA-layer permittivity. (c) Schematic illustration of simulated model, in which the water layer and IPA layer are created to simulate the water effect in reality; (d) parameters extracted from the coupled Lorentz oscillator model by fitting the experiments in the frequency range marked as gray in (a) under different water contents; (e) electric field monitored to SRRs under 0.2 and 2 μm water-layer thickness at three resonant peaks marked as I, II, and III in (b), respectively.

Fig. 3. (a)–(d) Joint time-frequency analysis of experimental extinction obtained from CWT at water content of (a) 0%, (b) 20%, (c) 60%, and (d) 100%. (e), (f) The dependences of extinction intensity and FWHM of Gaussian curve acquired at 2.21 THz on water content at (e) position 1 and (f) position 2 that have been marked in (a).

Fig. 4. (a)–(c) Dependence of measured transmission on frequency and water content in (a) IPA, (b) ethanol, and (c) acetone. (d)–(f) Dependence of measured phase shift on frequency and water content in (d) IPA, (e) ethanol, and (f) acetone. (g)–(i) Group delays under different water contents in (g) IPA, (h) ethanol, and (i) acetone. (j)–(l) Corresponding transmission and phase shift of three peaks labeled as peaks I, II, and III [as shown in Fig. 2(b)] at different water contents in (j) IPA, (k) ethanol, and (l) acetone. (m) Histogram of modulation depth and phase difference of peaks I, II, and III in different organic liquids.

文章链接网址:http://www.osapublishing.org/prj/abstract.cfm?uri=prj-7-12-1400

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