Direct backward third-harmonic generation in nanostructures
| Autor: | Chia-Hung Hsu, Che-Hang Yu, Miin-Jang Chen, Wen-Feng Hsieh, Wei-Rein Liu, Hsing-Chao Chen, Fu-Hsiung Chang, Chao-Yu Chen, Chieh-Feng Chang, Chi-Kuang Sun |
|---|---|
| Rok vydání: | 2010 |
| Předmět: |
Physics
Optics and Photonics Nanostructure Models Statistical business.industry Computation Normal Distribution Function (mathematics) Integral equation Ferric Compounds Atomic and Molecular Physics and Optics Nanostructures Optics Quantum dot Nano Quantum Dots Image Processing Computer-Assisted Nanotechnology Computer Simulation Third harmonic Thin film business Algorithms |
| Zdroj: | Optics express. 18(7) |
| ISSN: | 1094-4087 |
| Popis: | Direct-backward third harmonic generation (DBTHG) has been regarded as negligible or even inexistent due to the large value of wave-vector mismatch. In the past, BTHG signals were often interpreted as back-reflected or back-scattered forward-THG (FTHG). In this paper, we theoretically and experimentally demonstrate that backward third harmonic waves can be directly generated, and that their magnitude can be comparable with FTHG in nanostructures. Experimental data of DBTHG from ZnO thin films, CdSe quantum dots and Fe(3)O(4) nanoparticles agree well with simulation results based on the Green's function. An integral equation was also derived for fast computation of DBTHG in nano films. Our investigation suggests that DBTHG can be a potentially powerful tool in nano-science research, especially when combined with FTHG measurements. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|