Dey Piyali, Chakraborty Nabamita, Samanta Madhupriya, Das Biswajit, Chattopadhyay Kalyan Kumar
Thin Film and Nano Science Laboratory, Department of Physics, Jadavpur University, Kolkata 700 032, India.
School of Material Science and Nanotechnology, Jadavpur University, Kolkata 700 032, India.
Phys Chem Chem Phys. 2024 Jul 24;26(29):20112-20122. doi: 10.1039/d4cp01852d.
Spatial self-phase modulation based on the optical Kerr effect has gained momentum in recent years to analyse the nonlinear optical properties of 2D inorganic nanomaterials. In the present work, we investigate the strong light-matter interaction of organic semiconducting materials based on SSPM, by developing Cu-phthalocyanine (CuPc) nanotubes a solvothermal technique. The low bandgap of CuPc facilitates the study of its nonlinear optical properties for a broad spectrum range from 671 nm to 405 nm. Intense laser light passing through the CuPc dispersion produces concentric diffraction ring patterns at the far field from which high and values, 3.667 × 10 cm W and 2 × 10 esu, respectively, are obtained for the 405 nm laser. This strong nonlinear optical response of CuPc has been utilized to realize non-reciprocal light propagation by constructing a CuPc/SnS hybrid structure, which makes an effective all-optical photonic diode. In addition, the all-optical switching is presented using CuPc nanotubes based on the spatial cross-phase modulation technique. In this technique a phase change is induced in the weak signal beam modulated by the strong controlling light beam, which helps to produce all-optical logic gates and all-optical switching devices. The experimental findings of this work unravel the potentially powerful applications of CuPc nanotubes in all-optical information transmission and all-optical photonic devices.
近年来，基于光学克尔效应的空间自相位调制在分析二维无机纳米材料的非线性光学性质方面得到了广泛应用。在本工作中，我们通过溶剂热技术制备了铜酞菁（CuPc）纳米管，研究了基于空间自相位调制的有机半导体材料的强光-物质相互作用。CuPc的低带隙有助于在671nm至405nm的宽光谱范围内研究其非线性光学性质。通过CuPc分散体的强激光在远场产生同心衍射环图案，对于405nm激光，分别获得了3.667×10⁻¹²cm/W和2×10⁻¹²esu 的高非线性系数值。利用CuPc的这种强非线性光学响应，通过构建CuPc/SnS混合结构实现了非互易光传播，从而制成了有效的全光光子二极管。此外，基于空间交叉相位调制技术，使用CuPc纳米管实现了全光开关。在该技术中，由强控制光束调制的弱信号光束中会引起相位变化，这有助于产生全光逻辑门和全光开关器件。这项工作的实验结果揭示了CuPc纳米管在全光信息传输和全光光子器件中的潜在强大应用。
