Key Laboratory of Micro Optics and Photonic Technology of Heilongjiang Province

Harbin, China

Key Laboratory of Micro Optics and Photonic Technology of Heilongjiang Province

Harbin, China
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Sun S.,Harbin Institute of Technology | Yi N.,Harbin Institute of Technology | Yao W.,Harbin Institute of Technology | Song Q.,Harbin Institute of Technology | And 2 more authors.
Optics Express | Year: 2014

We present a numerical simulation of second-harmonic generation (SHG) from a nonlinear magnetic metamaterial. By inserting a second-order nonlinear material in the high local field area of magnetic metamaterial, which consists of periodic arrays of paired thin silver strips, the convertion efficiency of SHG has been significantly enhanced by almost four orders of magnitude. The corresponding field patterns and further studies on dependance between SHG and symmetry of nonlinear crystal show that the increase of the conversion efficiency is attributed to the local field enhancement caused by the magnetic resonnance of the structure. Our researches provide an additional way to further improve the optical nonlinearity in nanostructures. © 2014 Optical Society of America


Zhao W.,Harbin Institute of Technology | Ju D.,Harbin Institute of Technology | Jiang Y.,Harbin Institute of Technology | Jiang Y.,Key Laboratory of Micro Optics and Photonic Technology of Heilongjiang Province | Zhan Q.,University of Dayton
Optics Express | Year: 2014

In this research paper, multiple trapped modes within a bi-periodic silicon particle array were studied numerically both through finite difference time domain method and finite element method. Anti-phased electric dipole, magnetic dipole, and magnetic quadrupole collective resonances in the two arrays result in three distinct trapped modes, which interact with the corresponding "bright modes" generating three sharp asymmetric Fano profiles in reflection. The lineshapes can be easily tailored by particle radius to achieve very narrow linewidth, while still remains 100% modulation depth. As a three-channel refractive sensor, the sensitivities for three working frequencies are 155nm/RIU, 725nm/RIU, and 190nm/RIU. © 2014 Optical Society of America.


Hao L.,Harbin Institute of Technology | Hao L.,Northeast Petroleum University | Wang Q.,Harbin Institute of Technology | Wang Q.,Northeast Petroleum University | And 2 more authors.
Journal of Modern Optics | Year: 2014

Unlike previous cases discussed, non-linear changes of refractive index in the photorefractive (PR) materials are governed by both the linear and quadratic electro-optic (EO) effects simultaneously now. Here, the evolution equations of one-dimension spatial solitons resulting from both the linear and quadratic EO effect are presented firstly. Under appropriate conditions, our analysis indicates that bright, dark, and gray solitons can exist in the steady-state regime. Moreover, stabilities of bright and dark soliton propagation are analyzed by means of beam propagation methods. The analytical solutions in the low-amplitude regime are also obtained. The self-deflection of such bright spatial solitons arising from diffusion effect in biased PR crystals involving both the linear and quadratic EO effects has been investigated symmetrically by the use of numerical techniques and perturbation methods. © 2014 Taylor & Francis.


Zhao W.,Harbin Institute of Technology | Jiang Y.,Harbin Institute of Technology | Jiang Y.,Key Laboratory of Micro Optics and Photonic Technology of Heilongjiang Province
Optics Letters | Year: 2015

Fano resonance originating from the interaction of anti-phased and in-phased lattice collective resonances supported by a binary gold nanodisk array is investigated both numerically and experimentally. As the magnitude of particle radii in the two arrays approaches gradually, the Q factor of such resonance increases while the spectral contrast reduces. In the experiment, a high spectral contrast of 0.7 and a large Q factor of 14 could be achieved at the same time due to the excitation of the pure dipole resonance of each particle resulting from the weak near-field coupling. Optimal calculation gives rise to a higher Q factor of up to 85 and a corresponding spectral contrast of 0.86, which is very promising in refractive sensors. The sensitivity and the figure of merit are 337 nm?RIU and 116, respectively. © 2014 Optical Society of America.


Bai Y.,Harbin Institute of Technology | Zhao L.,Harbin Institute of Technology | Ju D.,Harbin Institute of Technology | Jiang Y.,Harbin Institute of Technology | And 2 more authors.
Optics Express | Year: 2015

We propose a wide-angle, polarization-independent and dualband infrared perfect metamaterial absorber made of double L-shaped gold patches on a dielectric spacer and opaque gold ground layer. Numerical and experimental results demonstrate that the absorber has two near-unity absorption peaks, which are result from magnetic polariton modes generated at two different resonant wavelengths. In addition, the proposed structure also shows good absorption stability in a wide range of incident anglesθ for both TE and TM incidences at azimuthal angle φ = 0°. Moreover, we demonstrate that such structure has good absorption stability for a wide range of azimuthal angles due to the excitation of perpendicular magnetic polariton modes within the asymmetric double L-shaped structure. Such structure will assist in designing magnetic polaritons absorbing element for infrared spectroscopy and imaging. © 2015 Optical Society of America.


Ju D.,Harbin Institute of Technology | Pei H.,Harbin Institute of Technology | Jiang Y.,Harbin Institute of Technology | Jiang Y.,Key Laboratory of Micro Optics and Photonic Technology of Heilongjiang Province | Sun X.,Harbin Institute of Technology
Applied Physics Letters | Year: 2013

Nanojet effects excited by surface plasmon polariton at the shadow-side surfaces of dielectric microdisks positioned on gold films are reported. The surface plasmon nanojet can propagate over several optical wavelengths while still maintaining a subwavelength full-width at half-maximum transverse. Due to the nature of surface plasmon wave, the electric field of the highly confined nanojet at metal-dielectric interface is enhanced by about 30 times. By varying thickness of the dielectric microdisk, the formation of surface plasmon polariton nanojet can be flexibly controlled. The surface plasmon polariton nanojet shows great promise for enhanced Raman scattering and integrated plasmonic circuits. © 2013 AIP Publishing LLC.


Ju D.,Harbin Institute of Technology | Jiang Y.,Harbin Institute of Technology | Jiang Y.,Key Laboratory of Micro Optics and Photonic Technology of Heilongjiang Province | Pei H.,Harbin Institute of Technology
Plasmonics | Year: 2013

We theoretically study mode hybridization and interaction among surface plasmon polariton Bloch wave mode, Fabry-Perot cavity mode, and waveguide mode within a plasmonic cavity composed by two parallel planar bimetallic gratings. Four hybridized modes result from mode hybridization between surface plasmon polariton Bloch wave modes on the two gratings are observed. By changing the dielectric environment, mode hybridization behavior can be manipulated. Importantly, waveguide-plasmon polariton mode due to hybridization between grating supported surface plasmon polariton Bloch wave mode and cavity supported waveguide mode is observed. We demonstrate that surface plasmon polariton Bloch wave mode and Fabry-Perot cavity mode with the same mode symmetry can interact by presenting an anticrossing behavior, which can be controlled by laterally shifting one grating with respect to the other that causes a phase difference shift of the two involving modes. The proposed plasmonic cavity offers potentials for subwavelength lithography, tunable plasmonic filter, and controllable light-matter interaction. © 2013 Springer Science+Business Media New York.


Hao L.,Harbin Institute of Technology | Hao L.,Northeast Petroleum University | Wang Q.,Harbin Institute of Technology | Wang Q.,Northeast Petroleum University | And 2 more authors.
Journal of Modern Optics | Year: 2015

A number of new photorefractive materials, where refractive index changes in materials are simultaneously governed by both the linear and quadratic electro-optic effects, have been found in recent decades. Here we first present a comprehensively theoretical study of incoherently coupled spatial soliton pairs due to both the linear and quadratic electro-optic effects in all four possible realizations: dark-dark, bright-bright, gray-gray, and dark-bright. These soliton pairs owe their existence to the co-effects of both the linear and quadratic electro-optic effects where PR effect may be enhanced, weakened, or even counteracted because of the interaction of these two electro-optic effects. It is shown that these incoherently coupled spatial soliton pairs can be established provided that the incident beams have the same polarization, wavelength, and are mutually incoherent. At last, we give a simple elucidation on the stabilities of these incoherent coupled soliton pairs. Relevant examples are also provided. © 2014 Taylor and Francis.


Zhao W.,Harbin Institute of Technology | Ju D.,Harbin Institute of Technology | Jiang Y.,Harbin Institute of Technology | Jiang Y.,Key Laboratory of Micro Optics and Photonic Technology of Heilongjiang Province
Plasmonics | Year: 2015

In this research paper, a new type of Fano resonance originating from the far-field interference of lattice collective resonances of two sets of interlacing silver particle arrays with different radii is investigated numerically. The anti-phased collective resonance of the two arrays acts as “dark state”, while the phased one serves as “bright state”. The structure has the advantage to achieve both high modulation depth and sharp linewidth simultaneously, which is very attractive for plasmonic sensor, and the sensitivity and figure of merit can reach as high as 633 nm/RIU and 2000, respectively. Also, the structure has the merit of high Q factor up to 320. © 2014, Springer Science+Business Media New York.


Bai Y.,Harbin Institute of Technology | Jiang Y.,Harbin Institute of Technology | Jiang Y.,Key Laboratory of Micro Optics and Photonic Technology of Heilongjiang Province | Liu L.,Harbin Institute of Technology
Journal of Physics D: Applied Physics | Year: 2014

We study the near-field thermal energy density of the metal-dielectric-metal sandwich-like fishnet metamaterial (FMM) in the near infrared region by fluctuational electrodynamics. In addition to the electric response peaks of the near-field thermal radiation within the metamaterial, the other magnetic response peaks are observed, which are associated with the excitations of the surface plasmon polaritons (SPPs) propagating on the outer surface of the metal (external SPPs) and along the inner metal-dielectric interface (internal SPPs). It is shown that the external and internal SPPs are related to the macroscopic magnetic responses of the FMM and open new frequency channels of the near-field thermal radiation compared with that of conventional materials. This study will assist in the designing of innovative structures for thermal management at the nanoscale level. © 2014 IOP Publishing Ltd.

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