Highly efficient second harmonic generation of thin film lithium niobate nanograting near bound states in the continuum
Highly efficient second harmonic generation of thin film lithium niobate nanograting near bound states in the continuum
复制标题
连续体近束缚态薄膜铌酸锂纳米光栅的高效二次谐波产生
DOI:
10.1088/1361-6528/abfe23
复制
发表时间:
2020-06
期刊:
影响因子:
3.5
通讯作者:
Huihui Lu
中科院分区:
文献类型:
--
作者:
Zhijin Huang;Mengjia Wang;Yang Li;Jumei Shang;Ke Li;Wentao Qiu;Jiangli Dong;Heyuan Guan;Zhe Chen;Huihui Lu
Bound states in the continuum (BICs) are ubiquitous physical phenomena where such states occur due to strong coupling between leaky modes in side lossy systems. BICs in meta-optics and nanophotonics enable optical mode confinement to strengthen local field enhancement in nonlinear optics. In this study, we numerically investigate second-harmonic generation (SHG) in the vicinity of BICs with a photonic structure comprising one-dimensional nanogratings and a slab waveguide made of lithium niobate (LiNbO3, LN). By breaking the symmetry of LN nanogratings, BICs transition to quasi-BICs, which enable strong local field confinement inside LN slab waveguide to be supported, thereby resulting in improving SHG conversion with lower pump power of fundamental frequency (FW). With a peak intensity of 1.33 GW cm−2 at the FW, our structure features a second-harmonic conversion efficiency up to 8.13 × 10−5 at quasi-BICs. We believe that our results will facilitate the application of LN in integrated nonlinear nanophotonic.
登录
查看更多内容
影响因子:
7
作者:
Carletti L;Zilli A;Moia F;Toma A;Finazzi M;De Angelis C;Neshev DN;Celebrano M
通讯作者:
Celebrano M
影响因子:
4.6
作者:
Kupriianov, Anton S.;Xu, Yi;Tuz, Vladimir R.
通讯作者:
Tuz, Vladimir R.
影响因子:
64.8
作者:
Jin, Jicheng;Yin, Xuefan;Peng, Chao
通讯作者:
Peng, Chao
影响因子:
7
作者:
Gao, Xingwei;Zhen, Bo;Hsu, Chia Wei
通讯作者:
Hsu, Chia Wei
影响因子:
10.8
作者:
Lehr, Dennis;Reinhold, Joerg;Tuennermann, Andreas
通讯作者:
Tuennermann, Andreas