用于与金刚石纳米晶体耦合的品质因数达一百万的氮化硅光子晶体纳米腔的设计

Design of a silicon nitride photonic crystal nanocavity with a Quality factor of one million for coupling to a diamond nanocrystal.

作者信息

McCutcheon Murray W, Loncar Marko

机构信息

School of Engineering and Applied Science, Harvard University, Cambridge, MA 02138, USA.

出版信息

Opt Express. 2008 Nov 10;16(23):19136-45. doi: 10.1364/oe.16.019136.

DOI:10.1364/oe.16.019136

PMID:19582006

Abstract

A photonic crystal nanocavity with a Quality (Q) factor of 1.4 x 10(6), a mode volume of 0.78(lambda/n)(3), and an operating wavelength of 637 nm is designed in a silicon nitride (SiN(x)) ridge waveguide with refractive index of 2.0. The effect on the cavity Q factor and mode volume of single diamond nanocrystals of various sizes and locations embedded in the center and on top of the nanocavity is simulated, demonstrating that Q > 1 x 10(6) is achievable for realistic parameters. An analysis of the figures of merit for cavity quantum electrodynamics reveals that strong coupling between an embedded diamond nitrogen-vacancy center and the cavity mode is achievable for a range of cavity dimensions.

摘要

在折射率为2.0的氮化硅（SiN(x)）脊形波导中设计了一个品质（Q）因子为1.4×10(6)、模式体积为0.78(lambda/n)(3)且工作波长为637 nm的光子晶体纳米腔。模拟了嵌入纳米腔中心和顶部的各种尺寸和位置的单个金刚石纳米晶体对腔Q因子和模式体积的影响，结果表明对于实际参数，Q>1×10(6)是可以实现的。对腔量子电动力学品质因数的分析表明，对于一系列腔尺寸，嵌入的金刚石氮空位中心与腔模式之间可实现强耦合。