| FUNDAMENTAL AREAS OF PHENOMENOLOGY(INCLUDING APPLICATIONS) |
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A Sensor-on-Chip Based on Second-Order Optical Effect of ZnO Nanowires |
| ZHU Jing, ZHU Guang-Ping, LU Chang-Gui, XU Chun-Xiang, CUI Yi-Ping |
| Advanced Photonics Center, Southeast University, Nanjing 210096 |
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| Cite this article: |
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ZHU Jing, ZHU Guang-Ping, LU Chang-Gui et al 2009 Chin. Phys. Lett. 26 014204 |
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Abstract Strong second-order nonlinear effect of ZnO nanowires on a silicon wafer are demonstrated by using the hyper-Rayleigh scattering (HRS) measurement. The large nonlinear effect can be attributed to the following two factors: (1) the large total dipole moment caused by high surface defect density and electrostatic potential gradient, (2) coherent effect due to high crystal quality of single nanowire. Moreover, the second-order nonlinear effect is found to become weaker when the chip is put into organic solvent due to modification of surface defect caused by organic molecules. The variation of second-order signal in the solvent indicated the potential applications of ZnO nanowires as a sensor-on-chip (SoC).
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| Keywords:
42.65.-k
42.79.Nq
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Received: 12 September 2008
Published: 24 December 2008
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