Efficient All-Optical Molecule-Plasmon Modulation Based on T-shape Single Slit

被引：10
作者：
Chen, Jianjun [1 ,2 ,3 ,4 ]
Li, Zhi [3 ,4 ]
Xiao, Jinghua [1 ,2 ]
Gong, Qihuang [3 ,4 ]
机构：
[1] Beijing Univ Posts & Telecommun, State Key Lab Informat Photon & Opt Commun, Beijing 100876, Peoples R China
[2] Beijing Univ Posts & Telecommun, Sch Sci, Beijing 100876, Peoples R China
[3] Peking Univ, State Key Lab Mesoscop Phys, Beijing 100871, Peoples R China
[4] Peking Univ, Dept Phys, Beijing 100871, Peoples R China
来源：
PLASMONICS | 2013年 / 8卷 / 02期
基金：
中国国家自然科学基金;
关键词：
Surface plasmon polaritons; All optics; Modulation; Molecule reorientations; SURFACE-RELIEF GRATINGS; ACTIVE PLASMONICS; PHOTOCHROMIC MOLECULES; TELECOM WAVELENGTHS; FILM; POLARITONS; GENERATION; COMPOSITE; POLYMER; LIGHT;
D O I：
10.1007/s11468-012-9380-2
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Efficient all-optical molecule-plasmon modulation is experimentally demonstrated by employing a compact T-shape single slit on a metal film coated with an azopolymer film, in which the azobenzene molecules can be reoriented by a pump beam. In the T-shape single slit, the transmission spectra exhibit periodic behaviors and are quite sensitive to variations of the refractive index of the azopolymer in the groove. Under a pump beam, the azobenzene molecules are reoriented, so the SPPs in the groove feel a refractive index quite different from that of the originally isotropic azopolymer with randomly orientations. This leads to a high modulation depth of about 53 % (3.3 dB) and a phase variation of >pi experimentally.
引用
收藏
页码：233 / 237
页数：5
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