Huang Ludan, Wang Chia-Jean, Lin Lih Y
Department of Physics, University of Washington, Seattle, Washington 98195, USA.
Opt Lett. 2007 Feb 1;32(3):235-7. doi: 10.1364/ol.32.000235.
We present cross-talk calculations for a subdiffraction nanophotonic waveguide that consists of a colloidal quantum dot (QD) array 10 nm in diameter and compare the results with conventional continuous dielectric waveguides, assuming the same 10 nm size as well as a 200 nm cutoff diameter for guided mode. We find that the QD cascade has much lower cross talk than 10 nm dielectric waveguides at an identical separation >30 nm. Moreover, results for 200 nm dielectric waveguides at a 280 nm gap are comparable with those of QD structures spaced 110 nm apart. Hence the proposed QD device is potentially superior to conventional waveguides in achieving lower cross talk in the subdiffraction regime and provides a new route to achieving high-density photonic integrated circuits.
我们给出了一种由直径为10 nm的胶体量子点（QD）阵列构成的亚衍射纳米光子波导的串扰计算结果，并将其与传统的连续介质波导的结果进行比较，假设二者具有相同的10 nm尺寸以及200 nm的导模截止直径。我们发现，在间距大于30 nm时，量子点级联的串扰比10 nm的介质波导低得多。此外，280 nm间隙的200 nm介质波导的结果与间距为110 nm的量子点结构的结果相当。因此，所提出的量子点器件在亚衍射区域实现更低串扰方面可能优于传统波导，并为实现高密度光子集成电路提供了一条新途径。
