Spatial Photocontrol of the Optical Output from an Organic Crystal Waveguide
Spatial Photocontrol of the Optical Output from an Organic Crystal Waveguide
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DOI：
10.1021/jacs.9b07645
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发表时间：
2019-09-25
影响因子：
15
通讯作者：
Naumov, Pance
中科院分区：
文献类型：
--
作者：
Halabi, Jad Mahmoud;Ahmed, Ejaz;Naumov, Pance
分子晶体的机械性能和光波导的能力的多样性吸引了人们对这些材料在光机械转换中的潜在应用的研究。在这里，我们展示了空间光控的光输出从细长的单晶的偶氮化合物，3 '，4'-二甲基-4-（二甲氨基）偶氮苯，可用作晶体光波导。单晶自由端的位置可以通过在被照射的晶体表面处的反式和顺式异构体之间的可逆光开关来控制。晶体的被动光波导能力不受其暴露于UV光引起的变形的影响。此外，可以热调节材料在辐照时弯曲的响应时间，以控制晶体尖端的定位。这些具有双重（光学和光机械）响应的单晶有机致动器提供了长期寻求的动态全有机光学元件，以纳入微电路。
The versatility in mechanical properties and the capability of optical waveguiding of molecular crystals have attracted research on the potential application of these materials in optomechanical transduction. Here, we demonstrate spatial photocontrol over the optical output from slender single crystals of an azo compound, 3',4'-dimethyl-4-(dimethylamino)azobenzene that can be used as a crystalline optical waveguide. The position of the free end of a single crystal can be controlled through reversible photoswitching between the trans and cis isomers at the irradiated crystal surface. The passive optical waveguiding capability of the crystal remains unaffected by its deformation induced by exposure to UV light. Moreover, the response time of the material by bending upon irradiation can be thermally regulated to control the positioning of the tip of the crystal. These single-crystal organic actuators with dual (optical and photomechanical) response deliver on the long sought for dynamic all-organic optical elements to be incorporated in microcircuits.