White‐Light Generation through Nonlinear Optical Response of 1,3,5,7‐Tetraphenyladamantane: Amorphous versus Crystalline States,Advanced Optical Materials

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White‐Light Generation through Nonlinear Optical Response of 1,3,5,7‐Tetraphenyladamantane: Amorphous versus Crystalline States
Advanced Optical Materials ( IF 8.0 ) Pub Date : 2018-04-03 , DOI: 10.1002/adom.201701162
Nils W. Rosemann ₁ , Harald Locke ₂ , Peter R. Schreiner ₂ , Sangam Chatterjee ₁

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The vast optical nonlinearity of 1,3,5,7‐tetraphenyladamantane (AdPh₄) enables efficient frequency conversion. The observed spectrum depends heavily on the material's habitus. In particular, it shows nonlinear white‐light generation when its powder form is irradiated in the near‐infrared, similar to an analogous organotin sulfide cluster [(PhSn)₄S₆]. In contrast, single crystals of AdPh₄ exclusively exhibit narrow‐band second‐harmonic generation, i.e., discrete conversion within the crystal, rather than spectrally broadband white‐light emission. This shows that crystallinity restricts the nonlinear response to the symmetry‐allowed higher‐harmonics, in this case the even‐numbered, second harmonic, and inhibits the quasi‐continuum white‐light emission. Using the diamondoid‐based material significantly enhances compatibility with conventional production techniques using photorefractive polymers and is thus an important step towards the fabrication of all‐integrated white‐light emitting devices.

中文翻译：

通过1,3,5,7-四苯金刚烷的非线性光学响应产生白光：非晶态与结晶态

1,3,5,7-四苯基金刚烷（AdPh ₄）具有广泛的光学非线性特性，可实现高效的频率转换。观察到的光谱在很大程度上取决于材料的习性。特别是，当其粉末形式在近红外光下照射时，它会显示出非线性的白光产生，类似于类似的有机锡硫化物簇[（PhSn）₄ S ₆ ]。相比之下，AdPh _4的单晶仅展示窄带二次谐波的产生，即晶体内的离散转换，而不是频谱宽带白光发射。这表明结晶度限制了对对称允许的高次谐波的非线性响应，在这种情况下为偶数次谐波，并抑制了准连续白光发射。使用基于类金刚石的材料大大增强了与使用光折变聚合物的常规生产技术的兼容性，因此是朝着制造全集成白光发射器件迈出的重要一步。

更新日期：2018-04-03

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