Gold nano-antennas with silica substrate may not be suitable for high power applications such as heat resisted magnetic recording, solar thermophotovoltaics, and nano-scale heat transfer systems. When a laser beam reaches to these nano-antennas, part of the light is absorbed by the metallic regions, leading to a temperature rise of the device. If these devices reach a temperature beyond its Tamman temperature (the temperature at which sintering of atoms or molecules start to occur), the antenna can be damaged. One strategy to allow the antenna to work at higher fluences (energy density) is to employ substrates that can quickly carry the heat away from the antennas. In this paper, we show that high thermal conductivity substrates, such as diamond, can allow the antenna to withstand 20 times higher fluence than a low thermal conductivity silica substrate.

带有二氧化硅衬底的金纳米天线可能不适用于高功率应用，例如耐热磁记录、太阳能热光伏和纳米级传热系统。当激光束到达这些纳米天线时，部分光被金属区域吸收，导致设备温度升高。如果这些设备的温度超过其 Tamman 温度（原子或分子开始发生烧结的温度），则天线可能会损坏。允许天线在更高能量密度（能量密度）下工作的一种策略是使用可以快速将热量从天线带走的基板。在本文中，我们展示了高导热性基材，例如金刚石，