Efficient Coupling of an Antenna-Enhanced nanoLED into an Integrated InP Waveguide
Efficient Coupling of an Antenna-Enhanced nanoLED into an Integrated InP Waveguide
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DOI：
10.1021/acs.nanolett.5b00574
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发表时间：
2015-05-01
期刊：
影响因子：
10.8
通讯作者：
Wu, Ming C.
中科院分区：
文献类型：
--
作者：
Eggleston, Michael S.;Wu, Ming C.
传统的芯片上金属互连中的功耗增加使得光链路成为有吸引力的替代方案。然而，这样的链接目前缺少一个快速，高效，纳米级的光源。将纳米级光发射器耦合到光天线已经显示出极大地增加了它们的自发发射速率和效率。这种结构将是用于片上光链路的理想发射器。然而，从未有过天线增强发射器耦合到低损耗集成波导的演示。在这封信中，我们展示了一个光学天线增强nanoLED耦合到集成的InP波导。nanoLED由InGaAsP的纳米脊组成，该纳米脊耦合到金天线，该金天线表现出36倍增强的自发发射率。耦合效率高达70%的集成波导被证明。定向天线还展示了向下的方向发射-波导的一个方向，观察到的前后比高达3：1。
Increasing power consumption in traditional on-chip metal interconnects has made optical links an attractive alternative. However, such a link is currently Missing a fast, efficient, nanoscale light-source. Coupling nanoscale optical emitters to optical antennas has been shown to greatly increase their spontaneous emission rate and efficiency. Such a Structure would be an ideal emitter for an on-chip optical link. However, there has never been a demonstration of an antenna-enhanced emitter coupled to a low-loss integrated waveguide. In this Letter we demonstrate an optical antenna-enhanced nanoLED coupled to an integrated InP waveguide. The nanoLEDs are comprised of a nanoridge of InGaAsP coupled to a gold antenna that exhibits a 36X enhanced rate of Spontaneous emission. Coupling efficiencies as large as 70% are demonstrated into an integrated waveguide. Directional antennas also demonstrate direction emission down One direction of a waveguide with observed front-to-back ratios as high as 3:1.