Category Archives: Papers

Papers appearing in Advanced Optical Materials, the new section of Advanced Materials dedicated to all aspects of light-matter interactions.

Ultrafast Polymerization Inhibition by Stimulated Emission Depletion for Three-dimensional Nanolithography

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Ultrafast Polymerization Inhibition by Stimulated Emission Depletion for Three-depletion mechanism for STED lithographydimensional Nanolithography

Joachim Fischer and Martin Wegener

To identify the depletion mechanism in a stimulated-emission-depletion (STED) inspired photoresist composed of a ketocoumarin photoinitiator in pentaerythritol tetraacrylate, we perform lithography with pulsed excitation and tunable delayed depletion. A fast component can unambiguously be assigned to stimulated emission. Our results allow the systematical optimization of the conditions in next-generation STED direct-laser-writing optical lithography.

Self-Assembled Flexible Microlasers

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Self-Assembled Flexible MicrolasersHemispherical microlasers on distributed Bragg reflectors

Van Duong Ta, Rui Chen and Han Dong Sun

Hemispherical microresonators with tunable sizes are obtained based on the hydrophobic effect on distributed Bragg reflectors. Under optical excitation, whispering gallery mode lasing is observed from the dye-doped microresonators at room temperature. The results indicate the potential application of the flexible microresonators in photonic integrated circuits.

Certain Biominerals in Leaves Function as Light Scatterers

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Certain Biominerals in Leaves Function as Light Scatterers biomineral light scatterers

Assaf Gal, Vlad Brumfeld, Steve Weiner, Lia Addadi and Dan Oron

Leaf minerals function as internal light scatterers inside leaves. They transfer light from the saturated upper tissue into the light deprived lower tissue. This eases the steep light gradient inside the leaf and improves photosynthetic efficiency on the tissue scale.

Homoepitaxial Growth of Single Crystal Diamond Membranes for Quantum Information Processing

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Homoepitaxial Growth of Single Crystal Diamond Membranes for Quantum single crystal diamond membranesInformation Processing

Igor Aharonovich, Jonathan C. Lee, Andrew P. Magyar, Bob B. Buckley, Christopher G. Yale, David D. Awschalom and Evelyn L. Hu

Homoepitaxial growth of single crystal diamond membranes is demonstrated employing a microwave plasma chemical vapor deposition technique. The membranes possess excellent structural, optical, and spin properties, which make them suitable for fabrication of optical microcavities for applications in quantum information processing, photonics, spintronics, and sensing.

Spatially Resolved Photodetection in Leaky Ferroelectric BiFeO3

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Spatially Resolved Photodetection in Leaky Ferroelectric BiFeO3Spatially Resolved Photodetection in Leaky Ferroelectric BiFeO3

Won-Mo Lee, Ji Ho Sung, Kanghyun Chu, Xavier Moya, Donghun Lee, Cheol-Joo Kim, Neil D. Mathur, S.-W. Cheong, C.-H. Yang and Moon-Ho Jo

Potential gradients due to the spontaneous polarization of BiFeO3 yield asymmetric and nonlinear photocarrier dynamics. Photocurrent direction is determined by local ferroelectric domain orientation, whereas magnitude is spectrally centered around charged domain walls that are associated with oxygen vacancy migration. Photodetection can be electrically controlled by manipulating ferroelectric domain configurations.

Plasmon-Enhanced Sub-Wavelength Laser Ablation: Plasmonic Nanojets

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PlasmoPlasmonic Nanojets in Gold stucturesn-Enhanced Sub-Wavelength Laser Ablation: Plasmonic Nanojets

Ventsislav K. Valev, Denitza Denkova, Xuezhi Zheng, Arseniy I. Kuznetsov,
Carsten Reinhardt, Boris N. Chichkov, Gichka Tsutsumanova, Edward J. Osley,
Veselin Petkov, Ben De Clercq, Alejandro V. Silhanek, Yogesh Jeyaram, Vladimir Volskiy, Paul A. Warburton, Guy A. E. Vandenbosch, Stoyan Russev, Oleg A. Aktsipetrov, Marcel Ameloot, Victor V. Moshchalkov, and Thierry Verbiest

In response to the incident light’s electric field, the electron density oscillates in the plasmonic hotspots producing an electric current. Associated Ohmic losses raise the temperature of the material within the plasmonic hotspot above the melting point. A nanojet and nonosphere ejection can then be observed precisely from the plasmonic hotspots.

Efficient Poling of Electro-Optic Polymers in Thin Films and Silicon Slot Waveguides by Detachable Pyroelectric Crystals

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Pyroelectric crystals to efficiently pole electro-optic polymersEfficient Poling of Electro-Optic Polymers in Thin Films and Silicon Slot Waveguides by Detachable Pyroelectric Crystals

Su Huang, Jingdong Luo, Hin-Lap Yip,
Ali Ayazi, Xing-Hua Zhou, Michael Gould,Antao Chen, Tom Baehr-Jones,
Michael Hochberg and Alex K.-Y. Jen

Pyroelectric crystals are used as a conformal and detachable electric field source to efficiently pole electro-optic (E-O) polymers in both parallel-plate (transverse) and in-plane (quasi-longitudinal) configurations. Large Pockels coefficients in poled thin films and high tunability of resonance wavelength shift in hybrid polymer silicon slot waveguide ring-resonator modulators have been achieved using this method.


Octupolar Films with Large Second Harmonic Generation and Electro-Optical Effects

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Octupolar Films with Large Second Harmonic Generation and Electro-Optical Effects

Mi-Yun Jeong, Sophie Brasselet, Tong-Kun Lim, Bong Rae Cho

Octupolar films composed of 1,3,5- tricyano-2,4,6-tris(p-diethylaminostyryl)benzene (TTB) octupolarmolecules display both polycrystalline and cylindrical domains. The molecular orientation, second harmonic generation (SHG) efficiencies, and electro-optic (EO) coefficients of the crystalline domains are studied theoretically and experimentally. Both structures exhibit high and stable SHG and EO efficiencies. These characteristics will be useful in second order nonlinear optical applications.

High Magneto-Optical Activity and Low Optical Losses in Metal-Dielectric Au/Co/Au–SiO2 Magnetoplasmonic Nanodisks

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High Magneto-Optical Activity and Low Optical Losses in Metal-Dielectric Au/Co/Au–SiO2 Magnetoplasmonic Nanodisks

Juan Carlos Banthí, David Meneses-Rodríguez, Fernando García, María Ujué González, Antonio García-Martín, Alfonso Cebollada, Gaspar Armelles

Metal-dielectric Au-Co-SiO2 magnetoplasmonic nanodisks are found to exhibit large magneto-optical activity and low optical losses. The internal architecture of the nanodisks is such that, in resonant conditions, the electromagnetic field undertakes a particular spatial distribution. This makes it possible to maximize the electromagnetic field at the magneto-optically active layers and minimize it in the other, optically lossy ones.

A Gold Nanocrystal/Poly(dimethylsiloxane) Composite for Plasmonic Heating on Microfluidic Chips

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A Gold Nanocrystal/Poly(dimethylsiloxane) Composite for Plasmonic Heating on Microfluidic Chips

Caihong Fang, Lei Shao, Yihua Zhao, Jianfang Wang, Hongkai Wu

Gold nanocrystals are dispersed uniformly in poly(dimethylsiloxane) to produce a plasmonic composite. The composite can be readily used to fabricate microfluidic channels. An efficient optical heating approach on the microfluidic chips made of the composite is realized on the basis of plasmon-enabled photothermal conversion. A fluid flow switch based on the plasmonic heating is also demonstrated.