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Laser Science, LS 2021 - Part of Frontiers in optics, FiO 2021

作者： Ataai, Rajab Y. Chatterjee, Monish R. Jera, Elforjani S. Department of Electrical & Computer Engineering University of Dayton DaytonOH45469 United States Department of Electro Optics & Photonics University of Dayton DaytonOH45469 United States

In this paper, propagation of an EM wave across an achiral/chiral boundary with dielectric loss within specific chirality bands are examined specific to Fresnel power coefficients. Loss impact on both propagation and ... 详细信息

ISBN: (纸本)9781557528209

关键词： Dielectric losses

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Cosmic radiation effect on silicon photonic Mach-Zehnder Modulator

Cosmic radiation effect on silicon photonic Mach-Zehnder Mod...

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CLEO: Science and Innovations, S and I 2022

作者： Mao, Dun Chang, Lorry Lee, Hwaseob Li, Tiantian Wang, Zi Dong, Po Yu, Anthony W. Krainak, Michael A. Gu, Tingyi Department of Electrical and Computer Engineering University of Delaware NewarkDE19716 United States II-VI Incorporated 1389 Moffett Park Drive SunnyvaleCA94089 United States Lasers & Electro-Optics Branch NASA Goddard Space Flight Center GreenbeltMD20771 United States

We evaluated the radiation effects of cosmic rays on silicon Mach-Zehnder Modulator loaded on International Space Station. Permanent changes of refractive index (10-3) and carrier lifetime reduction have been observed... 详细信息

ISBN: (纸本)9781557528209

关键词： Cosmology

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Tunable long-wave infrared filters based on a dense array of resonance cavities and phase-change materials

Tunable long-wave infrared filters based on a dense array of...

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IEEE Research and Applications of Photonics In Defense Conference (RAPID)

作者： Matthew Klein Shivashankar R. Vangala Joshua R. Hendrickson Dylan Morden Ivan Avrutsky KBR Beavercreek OH USA Air Force Research Laboratory Sensors Directorate Wright-Patterson AFB OH USA Department of Electro-Optics and Photonics University of Dayton Dayton OH USA Department of Electrical and Computer Engineering Wayne State University Detroit MI US

ISBN: (数字)9798350373097

ISBN: (纸本)9798350373103

We present polarization and angle insensitive tunable, long-wave infrared filters based on a dense array of phase change resonators. Patterning arrays with different heights and diameters readily tune the baseline resonant wavelength and linewidth of the spectral response, while annealing the PCM at different temperatures can further tune the resonant wavelength.

关键词： Phased arrays Phase change materials Annealing Resonator filters Resonance Resonators Photonics

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Actively tunable angle-independent mid-infrared optical filters using GST Fabry-Perot resonators 5

Actively tunable angle-independent mid-infrared optical filt...

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5th IEEE Research and Applications of Photonics in Defense Conference, RAPID 2022

作者： Morden, Dylan Smith, Evan Avrutsky, Ivan Hendrickson, Joshua Vangala, Shivashankar Agha, Imad Univeristy of Dayton Department of Electro-Optics and Photonics Dayton United States Kbr Inc. Beavercreek United States Wayne State University Department of Electrical and Computer Engineering Detroit United States Wright Patterson Air Force Base Sensors Directorate Air Force Research Laboratory United States University of Dayton Department of Physics Dayton United States

ISBN: (数字)9781665402231

ISBN: (纸本)9781665402231

Germanium antimony telluride (GST) properties and experimental results of mid-infrared optical filter are demonstrated. Incorporating sub-wavelength gratings of GST-Ag, Fabry-Perot resonators produce transmission peak are observed. Active tuning by, thermal excitation, of GST shifts refractive index from 3.48-4.61 while maintaining angular independence up to 60°. © 2022 IEEE.

关键词： Phase change materials

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Non-spreading Bessel spatiotemporal optical vortices

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Science Bulletin 2022年第2期67卷 133-140,M0003页

作者： Qian Cao Jian Chen Keyin Lu Chenhao Wan Andy Chong Qiwen Zhan School of Optical-Electrical and Computer Engineering University of Shanghai for Science and TechnologyShanghai 200093China School of Optical and Electronic Information Huazhong University of Science and TechnologyWuhan 430074China Department of Physics University of DaytonDayton OH 45469USA Department of Electro-Optics and Photonics University of DaytonDayton OH 45469USA

Non-spreading nature of Bessel spatiotemporal wavepackets is theoretically and experimentally investigated and orders of magnitude improvement in the spatiotemporal spreading has been *** spatiotemporal confinement provided by the Bessel spatiotemporal wavepacket is further exploited to transport transverse orbital angular momentum through embedding spatiotemporal optical vortex into the Bessel spatiotemporal wavepacket, constructing a new type of wavepacket: Bessel spatiotemporal optical vortex. Both numerical and experimental results demonstrate that spatiotemporal vortex structure can be well maintained and confined through much longer propagation. High order spatiotemporal optical vortices can also be better confined in the spatiotemporal domain and prevented from further breaking up, overcoming a potential major obstacle for future applications of spatiotemporal vortex.

关键词： Optical vortices Bessel spatiotemporal wavepacket Orbital angular momentum Spatiotemporal vortex

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Cylindrical-Lens-Embedded Photonic Crystal Based on Self-Collimation 5

Cylindrical-Lens-Embedded Photonic Crystal Based on Self-Col...

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5th IEEE Research and Applications of Photonics in Defense Conference, RAPID 2022

作者： Xia, Chun Gutierrez, Jesus J. Kuebler, Stephen M. Rumpf, Raymond C. Touma, Jimmy University of Central Florida The College of Optics and Photonics Creol OrlandoFL32816 United States University of Texas at El Paso Em Lab Department of Electrical and Computer Engineering El PasoTX79968 United States Materials Science and Engineering University of Central Florida Creol The College of Optics and Photonics Chemistry Department OrlandoFL32816 United States Computational Science Program University of Texas at El Paso Em Lab Department of Electrical and Computer Engineering El PasoTX79968 United States Eglin Afb AFRL/Munitions Directorate Integrated Sensing and Processing Branch FL32542 United States

Independent optical power and phase control is experimentally demonstrated in a self-collimating PC based on rod-into-wall unit cell and fabricated in a low-refractive-index medium by multiphoton lithography. © 2... 详细信息

ISBN: (数字)9781665402231

ISBN: (纸本)9781665402231

关键词： Refractive index

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Cosmic radiation reduced photo-thermal dispersion in silicon micro-ring resonators

Cosmic radiation reduced photo-thermal dispersion in silicon...

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Conference on Lasers and electro-optics (CLEO)

作者： Lorry Chang Dun Mao Hwaseob Lee Anthony W. Yu Michael A. Krainak Tingyi Gu Department of Electrical and Computer Engineering University of Delaware Newark DE USA Lasers & Electro-Optics Branch NASA Goddard Space Flight Center Greenbelt MD USA

The accumulative radiation increases the defects density in silicon and reduces the free-carrier lifetime, which results in reduced photo-thermal dispersion in silicon micro-ring resonators.

ISBN: (数字)9781957171050

ISBN: (纸本)9781665466660

The accumulative radiation increases the defects density in silicon and reduces the free-carrier lifetime, which results in reduced photo-thermal dispersion in silicon micro-ring resonators.

关键词： Silicon Resonators Dispersion Electo-optic effects

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Reconfigurable chiral phase change nanomaterials

Reconfigurable chiral phase change nanomaterials

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2023 Conference on Lasers and electro-optics, CLEO 2023

作者： Burrow, Joshua A. Alam, Md Shah Smith, Evan M. Yahiaoui, Riad Laing, Ryan Shah, Piyush J. Searles, Thomas Vangala, Shivashankar Hendrickson, Joshua R. Sarangan, Andrew Agha, Imad Electro-Optics Department University of Dayton DaytonOH45469 United States School of Engineering Brown University ProvidenceRI02912 United States KBR Inc. BeavercreekOH45431 United States Department of Electrical & Computer Engineering University of Illinois Chicago ChicagoIL United States Physics Department University of Dayton DaytonOH45469 United States Apex Microdevices LLC West ChesterOH45069 United States Air Force Research Laboratory Sensors Directorate Wright-Patterson AFBOH45433 United States

We realize intrinsically chiral phase change material nano-helices that achieves the critical goal of demonstrating high-speed temporal control of opto-chirality over 50,000 cycles in Ge2Sb2Te5,. © Optica Publish... 详细信息

ISBN: (纸本)9781957171258

关键词： Phase change materials

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Exploring the non-Hermitian topology of exceptional points in lasers and fiber loops

Exploring the non-Hermitian topology of exceptional points i...

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2023 Conference on Lasers and electro-optics Europe and European Quantum electronics Conference, CLEO/Europe-EQEC 2023

作者： Schumer, Alexander Nasari, Hadiseh Liu, Yuzhou G.N. Lopez-Galmiche, Gisela Leshin, Jason Lopez-Aviles, Helena E. Ding, Lei Alahmadi, Yousef Hassan, Absar U. Zhong, Qi Rotter, Stefan LiKamWa, Patrick Christodoulides, Demetrios N. Khajavikhan, Mercedeh ViennaA-1040 Austria Ming Hsieh Department of Electrical and Computer Engineering University of Southern California Los AngelesCA90089 United States CREOL The College of Optics & Photonics University of Central Florida OrlandoFL United States Center of Excellence for Telecomm Applications Joint Centers of Excellence Program King Abdul Aziz City for Science and Technology Riyadh11442 Saudi Arabia Department of Physics & Astronomy University of Southern California Los AngelesCA United States

ISBN: (纸本)9798350345995

When non-Hermitian eigenvalue surfaces form intertwined Riemann surfaces, the corresponding non-Hermitian singularities, also know as exceptional points (EPs), are located at the center of this specific topology. Various experimental platforms have recently been presented in which interesting new physics associated with these branch point singularities can be explored. In particular, it has been shown that dynamically encircling EPs may lead to a so-called chiral state transfer. The chirality in this context refers to the fact that in such an encircling protocol, the final state at the end of an EP-enclosing loop solely depends on the encircling direction (clockwise or counterclockwise), but not on the initial state. Such a chiral behavior is intrinsically linked to the state vector deviating from adiabatically following the system's eigenstates associated with the eigenvalue surfaces;instead, due to the non-Hermitian violation of the adiabatic theorem, non-adiabatic jumps let the system undergo transitions from lossy eigenstates to eigenstates with gain. Here, we present two experiments that implement concepts that go beyond this established paradigm. © 2023 IEEE.

关键词： Topology

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Design and fabrication of a metalens with a hexagonal array of intersecting-wall meta-atoms for operation in the near-infrared 5

Design and fabrication of a metalens with a hexagonal array ...

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5th IEEE Research and Applications of Photonics in Defense Conference, RAPID 2022

作者： Horton, Chad L. Kuebler, Stephen M. Martinez, Manuel Bustamante, Edgar Rumpf, Raymond C. Touma, Jimmy University of Central Florida Chemistry Department OrlandoFL32816 United States Creol The College of Optics and Photonics Chemistry Department University of Central Florida Department of Materials Science and Engineering OrlandoFL32816 United States University of Texas at El Paso Em Lab Department of Electrical and Computer Engineering El PasoTX79968 United States University of Texas at El Paso Em Lab Department of Electrical and Computer Engineering Computational Science Program El PasoTX79968 United States AFRL/Munitions Directorate Integrated Sensing and Processing Branch Eglin AFB FL32542 United States

A metalens with a hexagonal array of intersecting-wall meta-atoms was designed for operation at a wavelength of 1.550 μm with a new meta-optics design tool (MODT) and fabricated in the photopolymer IP-Dip by multi-ph... 详细信息

ISBN: (数字)9781665402231

ISBN: (纸本)9781665402231

关键词： Photons

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