Yongyuan Zhu

Professor,
PI of NNLM,
Physics Dept.,
Nanjing Univ.

Shining Zhu

Professor,
Academician of CAS,
PI of NNLM,
Physics Dept.,
Nanjing Univ.
Research interests:
Microstructured materials;
Nonlinear optics;Plasmonics.
Research interests:
QPM materials and nonlinear optics; Quantum optics; Metamaterials.
  Recent Breakthroughs

Trapping light by mimicking gravitational lensing
Nature Photonics
7, 902 (2013)



Published in Nature photonics 7, 902 (2013)  
Press Release: Scientific American   Phys.org   Newscientist   Nature News   HUFFPOST   Technology.org   Global.org



Compact Engineering of Path-Entangled Sources from a Monolithic Quadratic Nonlinear Photonic Crystal



Published in Phys.Rev.Lett.  ( July. 2013)


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  LAB NEWS

[2014.3] Prof. Hui LIU presented our recent work at APS March meeting in Denver . One of our experiment pictures is featured in this year's March meeting images gallery, titled as " Gravitational Lensing on a Chip"

 

[2013.12]  Nature Photonics Editorial "The power of analogies" (Published online 24 December 2013) gives a review on our recent experimental work on an optical analogue of a gravitational lens.

 

[2013-11] "Physics" (2013, 42 (11), 795) reported our work in cover page:  Gravitation lensing mimicking and optical trapping in a optical chip

 

[2013-09] Professor Liu Hui and Ph.D student Sheng Chong have breakthroughs in metamaterial photonic chip.We fabricate broadband transform optical cavity by mimicking gravitational lensing.It can capture NIR and visible photon.The work published in
Nature Photonics 7, 902 (2013) ;


[2011-05]
China-Russsia Joint Workshop on Plasmonics organized successfully

 

[2011-02] Strong Light-Induced Negative Optical Pressure...and Cavity phase matching...published in PRL


[2010-04] Long-Wavelength Optical Properties of a Plasmonic Crystal...published in PRL;






































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  Research Highlights

Strong Light-Induced Negative Optical Pressure Arising from Kinetic Energy of Conduction Electrons in Plasmon-Type Cavities

We found that very strong negative optical pressure can be induced in plasmonic cavities by LC resonance. This interesting effect could be described qualitatively by a Lagrangian model which shows that the negative optical pressure is driven by the internal inductance and the kinetic energy of the conduction electrons. If the metal is replaced by perfect conductors, the optical pressure becomes much smaller and positive.

Cavity Phase Matching via an Optical Parametric Oscillator Consisting of a Dielectric Nonlinear Crystal Sheet

We experimentally demonstrate cavity phase matching for the first time using a sheet optical parametric oscillator which is made of an x-cut KTiOPO4 crystal sheet. This microcavity presents 220 kW peak power capability for near-frequency-degenerate parametric outputs with up to 23.8% slope efficiency. It also features unique spectral characteristics such as single-longitudinal-mode and narrow linewidth. These attractive properties predict broad applications of such a mini-device, such as terahertz generation, photonic integration, spectroscopy, and quantum information, etc

Long-Wavelength Optical Properties of a Plasmonic Crystal

The optical properties of a plasmonic crystal composed of gold nanorod particles have been studied. Because of the strong coupling between the incident light and vibrations of free electrons, the long-wavelength optical properties such as the dielectric abnormality and polariton excitation etc., which were suggested originally in ionic crystals, can also be present in the plasmonic crystal. The results show that the plasmonic and ionic lattices may share a common physics...

Transforming Spatial Entanglement Using a Domain-Engineering Technique

We study the spatial correlation of a two-photon entangled state produced in a multistripe periodically poled LiTaO3 crystal by spontaneous parametric down-conversion. The far-field diffraction-interference experiments reveal that the transverse modulation of domain patterns transforms the spatial mode function of the two-photon state. This result offers an approach to prepare a novel type of two-photon state with a unique spatial entanglement by using a domain-engineering technique....

Nonlinear Cerenkov Radiation

Nonlinear Cerenkov radiation is observed from a nonlinear photonic crystal waveguide where the nonlinear susceptibility tensor is modulated by the ferroelectric domain. Multiple radiation spots with different azimuth angles are simultaneously exhibited from such a hexagonally poled waveguide...

Local Quasi-Phase-Matching

We have developed a new type of QPM method suitable for complicated non-plane-wave nonlinear interactions, which is of obviously higher phase-matching ability than the conventional QPM method. Another advantage of the new scheme is that it is able to integrate several functions into single device thus making the device more compact...

One laser, one beam, three color

We demonstrate a high-power quasi-white laser based on quasi-phase-matching and alternately resonant dual-wavelength laser technique. A cascaded LiTaO3 superlattice was used to achieve the generation of red, green, and blue light from a diode-side-pumped Q-switched alternately resonant dual-wavelength Nd:YAG laser...

Magnetic Plasmon Polariton in Coupled Metamaterials

Some hybrid or collective magnetic plasmon modes were found in magnetic metamaterials after including the coupling effect. When light interacts with such magnetic plasmon modes, a new type of polariton can be formed: magnetic plasmon polariton (MPP).

Conical harmonic beams from 2D optical superlattice

The conical harmonic beams were discovered from the 2D hexagonally poled lithium tantalate. It is found to be a new type of nonlinear interaction--- the elastic scattering involved sum-frequency-generation process°≠

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