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Nano-optical antenna and scanning near-field probe application

Author: DongKeXiu
Tutor: ShiJianPing
School: Anhui Normal University
Course: Optics
Keywords: Surface plasmon FDTD Optical antennas High-resolution probes
CLC: TN820
Type: Master's thesis
Year: 2010
Downloads: 165
Quote: 0
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Abstract


Nano-optical antenna concept was in 2003 by Stanford University KB Crozier group made, is a light-frequency electromagnetic waves can be efficiently coupled to subwavelength scale nanophotonic devices. Because of its strong waves and enhanced bunching effect, can effectively collect light energy and limit it to subwavelength scale, to achieve nanoscale focusing of light waves, breaking the diffraction limit of light within the nano-scale information processing and Communication provides possible way. Super-resolution microscope imaging, efficient spectrum (such as Raman scattering, autofluorescence, etc.) detection, high efficiency solar cells, high-density optical data storage, nanolithography and other areas show a tempting prospect. In this paper, nano-optical antenna field enhancement features in depth analysis and study on the basis of near-infrared resonant nano antenna design approach, the final preliminary study of resonance in nano-optical antenna near-field scanning optical probe on the application . Firstly, brief introduction to nano-optics research status and progress of the antenna, and then using the finite difference time domain (FDTD) method systematically analyzes the structure of the antenna field enhancement of the incident light polarization direction of incident light relationship, combined with Fabry-Perot resonance model to investigate the near-infrared nano-optical antenna design method of numerical simulation after repeated wave phase difference φ and the near-infrared excitation wavelength monopole antenna dipole arm length and the corresponding relationship between the ratio of length of curves, achieve a specific wavelength nano-optical antenna design foundation. Paper also nano-optical antenna near-field scanning optical probe on the initial application were studied. We metal nano-optical dipole antennas are integrated in the conventional near-field scanning probe tip, designed a new type of high resolution antenna probe, based on the FDTD method simulation shows that when the probe diameter of 50nm, 100nm, 130nm , 150nm, 200nm, the resolution was 100nm 75nm, 50 nm, 45 nm, 50nm, 70nm. Visible with conventional probes with probe aperture increases the resolution of sharp decline in the trend is different when the new probe in the large aperture resolution has obvious advantages. 150nm in diameter probe obtained when new 45nm resolution can be achieved. \The results also show that the sensitivity and contrast of the new probe has improved greatly, the resolution can be further enhanced SNOM provide new technical way.

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CLC: > Industrial Technology > Radio electronics, telecommunications technology > Radio equipment,telecommunications equipment > Antenna > General issues
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