Hashizume Jiro, Koyama Fumio
Opt Express. 2004 Dec 13;12(25):6391-6. doi: 10.1364/opex.12.006391.
We demonstrate a metal nano-aperture GaAs vertical cavity surface emitting laser (VCSEL) for sub-wavelength optical near-filed probing, which exhibits the strong plasmon enhancement of both optical near-fields and voltage signals with forming a metal nano-particle in the nano-aperture. The threshold current is as low as 300microA, which shows a potential of nano-probing with low power consumption. We achieved the first demonstration of a plasmon enhanced VCSEL near-field probe. The spatial resolutions of the VCSEL probe with 400 nm and 200 nm apertures are 240nm and 130 nm, respectively. The enhancement factors of the optical near-field and voltage signal with a Au particle are 1.8 and 2, respectively. Our FDTD simulation shows that localized plasmon with a Au particle is very helpful for increasing optical near-field intensity and signal voltage in the VCSEL nano-probing.
我们展示了一种用于亚波长光学近场探测的金属纳米孔径砷化镓垂直腔面发射激光器（VCSEL），该激光器通过在纳米孔径中形成金属纳米粒子，实现了光学近场和电压信号的强等离子体增强。阈值电流低至300微安，显示出低功耗纳米探测的潜力。我们首次演示了等离子体增强VCSEL近场探头。孔径为400纳米和200纳米的VCSEL探头的空间分辨率分别为240纳米和130纳米。含金粒子的光学近场和电压信号的增强因子分别为1.8和2。我们的有限时域差分（FDTD）模拟表明，含金粒子的局域等离子体对提高VCSEL纳米探测中的光学近场强度和信号电压非常有帮助。
