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Euro-American Workshop on Information optics (WIO)

作者： Bahram Javidi Arun Anand Artur Carnicer Inkyu Moon Adrian Stern Manuel Martinez Hong Hua Pedro Latorre Carmona Filiberto Pla Department of Electrical and Computer Engineering University of Connecticut Connecticut USA Physics Department The MS University of Baroda India Physics Department Univ of Barcelona Barcelona Spain School of Computer Engineering Chosun University Gwangju South Korea Electro-Optics Department Ben Gurion University of the Negev Israel Physics Department University of Valencia Valencia Spain College of Optical Sciences University of Arizona Tuscon Arizona USA University of Jaime I Castellon Spain

ISBN: (纸本)9781509021642

In this invited paper, we present an overview of our recently published work on 3D imaging, visualization and displays, including optical security using quantum imaging principles, 3D microscopy, healthcare, automated disease identification with 3D imaging, fatigue free augmented reality 3D glasses, and optical security and authentication using photon counting for IC inspection, polarimetric photon counting 3D imaging, and 3D human gesture recognition.

关键词： Three-dimensional displays Holography Optical sensors Holographic optical components Optical imaging

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Short pulse generation based on ultrafast Transient Bragg Gratings

Short pulse generation based on ultrafast Transient Bragg Gr...

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IEEE/LEOS International Conference on Optical MEMS

作者： Aviran Halstuch Avishay Shamir Amiel A. Ishaaya Yonatan Sivan Department of Electrical and Computer Engineering Ben-Gurion University of the Negev Beer-Sheva Israel Unit of Electro-Optics Engineering Ben-Gurion University of the Negev Beer-Sheva Israel

We analyze analytically and numerically a configuration where a fs transverse pulse creates a Transient-Bragg-Grating in a fiber/waveguide. We characterize the reflected ultra-short pulses depending on the grating par... 详细信息

关键词： Gratings Ultrafast optics Bragg gratings Optical pulse generation Optical fibers Optical pumping

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Photonic Crystals: Light‐Patterned Crystallographic Direction of a Self‐Organized 3D Soft Photonic Crystal (Adv. Mater. 42/2017)

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Advanced Materials 2017年第42期29卷

作者： Zhi‐Gang Zheng Cong‐Long Yuan Wei Hu Hari Krishna Bisoyi Ming‐Jie Tang Zhen Liu Pei‐Zhi Sun Wei‐Qiang Yang Xiao‐Qian Wang Dong Shen Yannian Li Fangfu Ye Yan‐Qing Lu Guoqiang Li Quan Li Department of Physics East China University of Science and Technology Shanghai 200237 China Liquid Crystal Institute and Chemical Physics Interdisciplinary Program Kent State University Kent OH 44242 USA National Laboratory of Solid State Microstructures Collaborative Innovation Center of Advanced Microstructures and College of Engineering and Applied Sciences Nanjing University Nanjing 210093 China Beijing National Laboratory for Condensed Matter Physics and CAS Key Laboratory of Soft Matter Physics Institute of Physics Chinese Academy of Sciences Beijing 100190 China Visual and Biomedical Optics Lab Department of Ophthalmology and Visual Science and Department of Electrical and Computer Engineering Ohio State University Columbus OH 43212 USA

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Hollow-core photonic bandgap fiber cladding designs for third harmonic generation

Hollow-core photonic bandgap fiber cladding designs for thir...

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Nonlinear Photonics, NP 2014

作者： Montz, Zev Ishaaya, Amiel A. Electro-Optics Unit Ben-Gurion University of the Negev Beer Sheva84105 Israel Department of Electrical and Computer Engineering Ben-Gurion University of the Negev Beer Sheva84105 Israel

We present two novel silica cladding structures that have two well separated spectral bandgaps appropriate for frequency tripling. The low loss bandgaps are tens to hundreds of nm wide and support Gaussian like fundam... 详细信息

ISBN: (纸本)9781557528209

关键词： Energy gap

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Pulsed-light crystallization of thin film silicon, germanium, and silicon germanium alloy

Pulsed-light crystallization of thin film silicon, germanium...

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2014 MRS Spring Meeting

作者： Yan, Baojie Toner, William Dubey, Mukul Fan, Qihua Jiang, Chun-Sheng Stevenson, David Wintek Electro-Optics Corporation Ann ArborMI United States Department of Electrical Engineering and Computer Science South Dakota State University BrookingsSD United States National Renewable Energy Laboratory GoldenCO United States

We report the recent progress of crystallization of amorphous silicon (a-Si), amorphous germanium (a-Ge) and amorphous silicon germanium alloy (a-SiGe) using a pulsed-Xenon-lamp system with multiple lamps. The precursor materials were deposited using a sputtering machine on display glass substrates maintained on a rotary holder. The RF powers on the silicon and germanium targets were varied to control the Ge/Si ratio in the materials. The film thickness was in the range of 50-100 nm, targeting the application in thin film transistors (TFT). The samples were pre-heated to 350-450°C in a conveyer chamber with nitrogen flow before the crystallization. The materials were characterized using AFM, Raman and Spectroscopic Ellipsometry. We demonstrated that we can uniformly crystallize a-Si, a-SiGe, and a-Ge with a single-pulse or multiple-pulse process on 10×5 cm2 glass substrates. We found that the required crystallization power for a-Ge is much lower than for a-Si. The power needed to crystallize a-SiGe is between the power required for a-Ge and a-Si crystallizations, and it increased with increasing Si fraction. No Raman signal was measurable in the as-deposited films. Strong Raman peaks at 520 cm-1 and 290 cm-1 were observed in the pulsed-lamp crystallized poly-Si and poly-Ge films, respectively. Distinct Ge-Ge, Si-Ge, and Si-Si vibration modes were observed at ∼285 cm-1, ∼390 cm-1, and ∼470 cm-1, respectively, in the poly-SiGe films formed after the pulsed-light treatments. Their intensity ratios and the peak positions depended on the Ge/Si ratio and the light intensity used for the crystallization. AFM images showed the formation of large grains with increased surface roughness. © 2014 Materials Research Society.

关键词： Thin films

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Near-field fresnel reconstruction of digital holograms

Near-field fresnel reconstruction of digital holograms

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Digital Holography and Three-Dimensional Imaging, DH 2014

作者： Williams, Logan A. Nehmetallah, Georges Aylo, Rola Banerjee, Partha P. Electro-Optics Program University of Dayton Dayton OH 45469 United States Electrical Engineering and Computer Science Catholic University of America Washington DC 20064 United States Electrona Engineering LLC. 430 Taylor St. N.E. Washington DC 20017 United States

Fresnel transform implementation methods are explored which dramatically reduce the minimum reconstruction distance requirements and allow maximal signal recovery with numerically improved resolution scaling at any di... 详细信息

ISBN: (纸本)9781557523082

关键词： Signal reconstruction

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Pulsed–light Crystallization of Thin Film Silicon, Germanium, and Silicon Germanium Alloy

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MRS Online Proceedings Library 2014年第1期1666卷 1-6页

作者： Yan, Baojie Toner, William Dubey, Mukul Fan, Qihua Jiang, Chun-Sheng Stevenson, David Wintek Electro-Optics Corporation Ann Arbor USA Department of Electrical Engineering and Computer Science South Dakota State University Brookings USA National Renewable Energy Laboratory Golden USA

We report the recent progress of crystallization of amorphous silicon (a-Si), amorphous germanium (a-Ge) and amorphous silicon germanium alloy (a-SiGe) using a pulsed-Xenon-lamp system with multiple lamps. The precursor materials were deposited using a sputtering machine on display glass substrates maintained on a rotary holder. The RF powers on the silicon and germanium targets were varied to control the Ge/Si ratio in the materials. The film thickness was in the range of 50-100 nm, targeting the application in thin film transistors (TFT). The samples were pre-heated to 350-450°C in a conveyer chamber with nitrogen flow before the crystallization. The materials were characterized using AFM, Raman and Spectroscopic Ellipsometry. We demonstrated that we can uniformly crystallize a-Si, a-SiGe, and a-Ge with a single-pulse or multiple-pulse process on 10×5 cm2 glass substrates. We found that the required crystallization power for a-Ge is much lower than for a-Si. The power needed to crystallize a-SiGe is between the power required for a-Ge and a-Si crystallizations, and it increased with increasing Si fraction. No Raman signal was measurable in the as-deposited films. Strong Raman peaks at 520 cm-1 and 290 cm-1 were observed in the pulsed-lamp crystallized poly-Si and poly-Ge films, respectively. Distinct Ge-Ge, Si-Ge, and Si-Si vibration modes were observed at ~285 cm-1, ~390 cm-1, and ~470 cm-1, respectively, in the poly-SiGe films formed after the pulsed-light treatments. Their intensity ratios and the peak positions depended on the Ge/Si ratio and the light intensity used for the crystallization. AFM images showed the formation of large grains with increased surface roughness.

关键词： thin film Raman spectroscopy Si

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Complete electro-optic formalism using the nonlinear optical wave equation description and some resultant new device approaches

Complete electro-optic formalism using the nonlinear optical...

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2014 IEEE Avionics, Fiber-optics and Photonics Technology Conference, AVFOP 2014

作者： Nelson, Robert Zhan, Qiwen Devgan, Preetpaul Brown, Dean Griffin, Ben Shi, Shouyuan Murakowski, Janusz Air Force Research Laboratory Wright Patterson AFBOH United States Electro-Optics Program University of Dayton 300 College Park OH45459 United States UES Inc. and Air Force Research Laboratory DaytonOO United States Dept. of Electrical and Computer Engineering University of Delaware 140 Evans Hall NewarkDE19716 United States

ISBN: (纸本)9781479924745

The Jacobi Anger expression that arises out of tone modulation of an electro-optic device is a successful model which is derived assuming sinusoidal phase modulation of a lossless and phase matched modulator. The expressions are equation While the accuracy of the model is not a problem under the right conditions, we propose that deeper understanding of this expression can lead to novel modulator design and use. The starting point is to note that the electro-optic effect in nonlinear optical textbooks is usually a DC field nonlinear optical interaction [ref. 1], and that others have used a wave (Maxwell's) equation description of the EO effect [ref. 2-5], however there has not been presented a connection between the common analysis to the expressions in equation (1) to our knowledge. In fact many commonly used analysis are incomplete descriptions. The main reason for this gap is that nonlinear cascading is almost always neglected, and nonlinear cascading is what gives rise to multiple order sidebands. Secondly, few engineering and physics researchers discuss the electro-optic effect in terms of its full nonlinear optical description, which is simultaneous sum and difference frequency generation. © 2014 IEEE.

关键词： Maxwell equations

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Complete electro-optic formalism using the nonlinear optical wave equation description and some resultant new device approaches

Complete electro-optic formalism using the nonlinear optical...

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IEEE Conference on Avionics Fiber-optics and Photonics, AVFOP

作者： Robert Nelson Qiwen Zhan Preetpaul Devgan Dean Brown Ben Griffin Shouyuan Shi Janusz Murakowski Air Force Research Laboratory Wright Patterson AFB OH Electro-Optics Program University of Dayton Dayton Ohio UES Inc. Air Force Research Laboratory Dayton Ohio Dept. of Electrical and Computer Engineering University of Delaware Newark DE

Summary form only given. The existing descriptions of the electro-optic effect within electro-optic modulators have been updated and unified for the first time to the authors' knowledge. The more exact formulation is the basis of new research directions for modulators within the group. Here, the Jacobi Anger expression that arises out of tone modulation of an electro-optic device is a successful model which is derived assuming sinusoidal phase modulation of a lossless and phase matched modulator.

关键词： electrooptic modulators electrooptic effects Nonlinear optics Adaptive optics Frequency modulation

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Second-harmonic double-resonance cones in dispersive hyperbolic metamaterials

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Physical Review B 2014年第7期89卷 075123-075123页

作者： Domenico de Ceglia Maria Antonietta Vincenti Salvatore Campione Filippo Capolino Joseph W. Haus Michael Scalora National Research Council–AMRDEC Charles M. Bowden Research Laboratory Redstone Arsenal Alabama 35898 USA Department of Electrical Engineering and Computer Science University of California Irvine California 92697 USA Electro-Optics Program University of Dayton 300 College Park Dayton Ohio 45469 USA Charles M. Bowden Research Laboratory AMRDEC U.S. Army RDECOM Redstone Arsenal Alabama 35898 USA

We study the formation of second-harmonic double-resonance cones in hyperbolic metamaterials. An electric dipole on the surface of the structure induces second-harmonic light to propagate into two distinct volume plasmon-polariton channels: a signal that propagates within its own peculiar resonance cone and a phase-locked signal that is trapped under the pump's resonance cone. Metamaterial dispersion and birefringence induce a large angular divergence between the two volume plasmon polaritons, making these structures suitable for subwavelength second- and higher-harmonic imaging microscopy.

关键词： HARMONICS (Electric waves) DISPERSION (Atmospheric chemistry) HYPERBOLIC processes PLASMONS (Physics) POLARITONS

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