Browsing MIT Open Access Articles by Title
Now showing items 4610-4629 of 55750
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Broadband circulators based on directional coupling of one-way waveguides
(Optical Society of America, 2011-10)Resonator-based optical circulators are fundamentally bandwidth-limited by their quality factors. We propose a new type of circulator based on directional coupling between one-way photonic chiral edge states and conventional ... -
Broadband couplers for hybrid silicon-chalcogenide glass photonic integrated circuits
(The Optical Society, 2019-04)We report on the design, fabrication and testing of three types of coupling structures for hybrid chalcogenide glass Ge23Sb7S70-Silicon (GeSbS-Si) photonic integrated circuit platforms. The first type is a fully etched ... -
Broadband Electro-Optical Crossbar Switches Using Low-Loss Ge2Sb2Se4Te1 Phase Change Material
(Institute of Electrical and Electronics Engineers (IEEE), 2019-04)This theoretical modeling and simulation paper presents designs and projected performance of non-volatile broadband on-chip 1 × 2 and 2 × 2 electro-optical switches operating in the telecommunication C-band and based on ... -
Broadband leaky Lamb waves excited by optical breakdown in water
(Acoustical Society of America (ASA), 2019-08)Optical breakdown of water is used as a sound source to excite a broadband set of leaky Lamb waves in submerged aluminum plates. The source is shown to simultaneously excite guided modes spanning 0.1–5 MHz in frequency and ... -
Broadband Light Management with Thermochromic Hydrogel Microparticles for Smart Windows
(Elsevier BV, 2019)© 2018 Intelligent control of solar irradiance through windows is promising to reduce building energy consumption by at least 1.055 × 10 15 kJ/year in the United States. Light management with thermochromic smart windows ... -
Broadband loop gap resonator for nitrogen vacancy centers in diamond
(AIP Publishing, 2018)© 2018 Author(s). We present an S-band tunable loop gap resonator (LGR), which provides strong, homogeneous, and directionally uniform broadband microwave (MW) drive for nitrogen-vacancy (NV) ensembles. With 42 dBm of input ... -
Broadband lumped-element parameter extraction method of two-port 3D MEMS in-chip solenoid inductors based on a physics-based equivalent circuit model
(Multidisciplinary Digital Publishing Institute, 2020-09)Integrated 2D spiral inductors possess low inductance per unit area, which limits their application range. However, the state of investigation into the lumped-element parameter extraction method for integrated 3D in-chip ... -
Broadband optical properties of large-area monolayer CVD molybdenum disulfide
(American Physical Society, 2014-11)Recently emerging large-area single-layer MoS[subscript 2] grown by chemical vapor deposition has triggered great interest due to its exciting potential for applications in advanced electronic and optoelectronic devices. ... -
A broadband polygonal cloak for acoustic wave designed with linear coordinate transformation
(Acoustical Society of America (ASA), 2016-07)Previous acoustic cloaks designed with transformation acoustics always involve inhomogeneous material. In this paper, a design of acoustic polygonal cloak is proposed using linear polygonal transformation method. The ... -
Broadband slow-wave modulation in posterior and anterior cortex tracks distinct states of propofol-induced unconsciousness
(Springer Science and Business Media LLC, 2020)© 2020, The Author(s). A controversy has developed in recent years over the roles of frontal and posterior cortices in mediating consciousness and unconsciousness. Disruption of posterior cortex during sleep appears to ... -
Broadband Solenoidal Haloscope for Terahertz Axion Detection
(American Physical Society (APS), 2022-04-01)We introduce the Broadband Reflector Experiment for Axion Detection (BREAD) conceptual design and science program. This haloscope plans to search for bosonic dark matter across the [10^{-3},1] eV ([0.24, 240] THz) mass ... -
BROADBAND SPECTRAL MODELING OF THE EXTREME GIGAHERTZ-PEAKED SPECTRUM RADIO SOURCE PKS B0008-421
(IOP Publishing, 2015-08)We present broadband observations and spectral modeling of PKS B0008-421 and identify it as an extreme gigahertz-peaked spectrum (GPS) source. PKS B0008-421 is characterized by the steepest known spectral slope below the ... -
Broadband super-collimation in a hybrid photonic crystal structure
(Optical Society of America, 2009-04)We propose a two dimensional (2D) photonic crystal (PhC) structure that supports super-collimation over a large frequency range (over 4 times that of a traditional square lattice of holes). We theoretically and numerically ... -
Broadband surface-wave transformation cloak
(National Academy of Sciences (U.S.), 2015-06)Guiding surface electromagnetic waves around disorder without disturbing the wave amplitude or phase is in great demand for modern photonic and plasmonic devices, but is fundamentally difficult to realize because light ... -
Broadband Transparent Optical Phase Change Materials
(Optical Society of America, 2017-05)We report a new group of optical phase change materials Ge-Sb-Se-Te (GSST) with low loss from telecom bands to LWIR. We further demonstrated GSST-integrated SiN photonics with significantly improved switching performance ... -
Broadband transparent optical phase change materials for high-performance nonvolatile photonics
(Springer Science and Business Media LLC, 2019-09)Optical phase change materials (O-PCMs), a unique group of materials featuring exceptional optical property contrast upon a solid-state phase transition, have found widespread adoption in photonic applications such as ... -
Broadband unidirectional behavior of electromagnetic waves based on transformation optics
(Nature Publishing Group, 2017-01)High directive antennas are fundamental elements for microwave communication and information processing. Here, inspired by the method of transformation optics, we propose and demonstrate a transformation medium to control ... -
Broadband velocity modulation spectroscopy of HfF[superscript +]: Towards a measurement of the electron electric dipole moment
(Elsevier, 2012-06)Precision spectroscopy of trapped HfF[superscript +] will be used to search for the permanent electric dipole moment of the electron (eEDM). Prior to this study, spectroscopic information necessary for state preparation, ... -
Broadband X-Ray Observation of Broad-line Radio Galaxy 3C 109
(American Astronomical Society, 2020)© 2020. The American Astronomical Society. All rights reserved. We present a study of the central engine in the broad-line radio galaxy 3C 109. To investigate the immediate surrounding of this accreting, supermassive black ... -
Broadband X-Ray Observation of Broad-line Radio Galaxy 3C 109
© 2020. The American Astronomical Society. All rights reserved. We present a study of the central engine in the broad-line radio galaxy 3C 109. To investigate the immediate surrounding of this accreting, supermassive black ...
