Varshney P, Singh A P, Kundu M, Gopal K
Institute for Plasma Research, HBNI, Bhat Gandhinagar, Ahmedabad, Gujarat 382428 India.
Department of Physics and Electronics, Rajdhani College (University of Delhi), New Delhi, Delhi 110015 India.
Opt Quantum Electron. 2022;54(4):222. doi: 10.1007/s11082-022-03597-9. Epub 2022 Mar 13.
Nano-particle embedded system plays an importance in developing of future terahertz (THz) radiation source for real-world applications. The laser interactions with nanoparticle embedded system can produce a wide range of THz radiation due to plasma oscillations excitation. We investigate THz field generation from the laser-beat wave interaction with a mixture of spherical and cylindrical graphite nanoparticles in argon gas. Different laser intensity distributions such as Gaussian, cosh-Gaussian, flat-top and ring shape laser pulses have been studied in this work. The relevant plasmon resonance conditions with appropriate symmetry of spherical nanoparticles and cylindrical nanoparticles are discussed. THz field is enhanced upto the order of when the laser intensity redistributes along the polarization direction for a ring shape field envelope.
纳米粒子嵌入式系统在开发面向实际应用的未来太赫兹（THz）辐射源方面具有重要意义。由于等离子体振荡激发，激光与纳米粒子嵌入式系统的相互作用能够产生广泛的太赫兹辐射。我们研究了在氩气中激光拍波与球形和圆柱形石墨纳米粒子混合物相互作用产生太赫兹场的情况。在这项工作中，研究了不同的激光强度分布，如高斯、双曲余弦 - 高斯、平顶和环形激光脉冲。讨论了具有适当对称性的球形纳米粒子和圆柱形纳米粒子的相关等离子体共振条件。当激光强度沿环形场包络的偏振方向重新分布时，太赫兹场增强到 量级。
