Enhanced Nonlinear Refractive Index in ε-Near-Zero Materials

被引：368

作者：

Caspani, L. ^{[1
]}

Kaipurath, R. P. M. ^{[1
]}

Clerici, M. ^{[1
,2
]}

Ferrera, M. ^{[1
]}

Roger, T. ^{[1
]}

Kim, J. ^{[3
,4
]}

Kinsey, N. ^{[3
,4
]}

Pietrzyk, M. ^{[5
]}

Di Falco, A. ^{[5
]}

Shalaev, V. M. ^{[3
,4
]}

Boltasseva, A. ^{[3
,4
]}

Faccio, D. ^{[1
]}

机构：

[1] Heriot Watt Univ, SUPA, Inst Photon & Quantum Sci, Edinburgh EH14 4AS, Midlothian, Scotland

[2] Univ Glasgow, Sch Engn, Glasgow G12 8LT, Lanark, Scotland

[3] Purdue Univ, Sch Elect & Comp Engn, 1205 West State St, W Lafayette, IN 47907 USA

[4] Purdue Univ, Birck Nanotechnol Ctr, 1205 West State St, W Lafayette, IN 47907 USA

[5] Univ St Andrews, Sch Phys & Astron, SUPA, St Andrews KY16 9SS, Fife, Scotland

来源：

PHYSICAL REVIEW LETTERS | 2016年 / 116卷 / 23期

基金：

英国工程与自然科学研究理事会; 欧洲研究理事会;

关键词：

INDIUM TIN OXIDE; PULSED-LASER DEPOSITION; AL-DOPED ZNO; 2ND-HARMONIC GENERATION; COMPOSITE-MATERIALS; PERFECT ABSORPTION; WAVE-GUIDE; METAMATERIALS; FILMS; PROPAGATION;

D O I：

10.1103/PhysRevLett.116.233901

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

New propagation regimes for light arise from the ability to tune the dielectric permittivity to extremely low values. Here, we demonstrate a universal approach based on the low linear permittivity values attained in the epsilon-near-zero (ENZ) regime for enhancing the nonlinear refractive index, which enables remarkable light-induced changes of the material properties. Experiments performed on Al-doped ZnO (AZO) thin films show a sixfold increase of the Kerr nonlinear refractive index (n(2)) at the ENZ wavelength, located in the 1300 nm region. This in turn leads to ultrafast light-induced refractive index changes of the order of unity, thus representing a new paradigm for nonlinear optics.

引用

页数：5

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