Near-Field Optical Experimental Investigation of Gold Nanohole Array

Gold nanohole arrays are fabricated with focused ion beam irradiating gold thin film supported on quartz substrate. The topography of the nanohole arrays is characterized using an atomic force microscope, and the near-field optical transmission properties of the nanohole array are investigated with a near-field scanning optical microscope. Our experimental results verify the near-optical transmission performance and further demonstrate that they are in agreement with the theoretical calculation results. The enhanced optical transmission of the nanohole arrays are expected to be used for a variety of applications in sensor and photonics devices.