Boston University

Abl IP Holding LLC

US Government As Represented by the Secretary of the Army

Sun Chemical Corporation

Tufts University

The Trustees of Boston College

Xin Zhang

Stephan Anderson

Craig Eugene Marquardt

Guangwu Duan

Xiaoguang Zhao

Januk Swarup Aggarwal

John T Mayfield, Iii

Richard Douglas Averitt

Reza Ghaffarivardavagh

Andrew Strikwerda

Stephen Barry McCane

Russell Vern Rouse

Hu Tao

Heather Waugh

Fiorenzo G Omenetto

Russell J Schwartz

David L Kaplan

Forrest Starnes McCanless

Michael Wraback

Eric A Shaner

Kebin Fan

Willie John Padilla

Konstantinos Tsioris

Grace D Metcalfe

Donald C Henderson

David Richard Ranieri

Constantinos Nicolaou

Darryl Lynn Pittman

Darryl Lynn Pitman

Stephen Barry Mccane

John T Mayfield

A bilayler metamaterial silencer allows substantial fluid through the apparatus, while mitigating the propagation of sound through the apparatus, and while providing a form factor that is significantly more compact than previously-known devices. Moreover, illustrative embodiments allow a designer to specify one or both of the frequency or frequencies at which the apparatus mitigates sound propagation, and/or the bandwidth around the frequency or frequencies at which the apparatus mitigates sound propagation.

Air-transparent selective sound silencer using ultra-open metamaterial

A passive MRI enhancing embodiment includes a plurality of resonators and increases signal-to-noise ratio of radiofrequency signals emitted by a specimen and captured by an MRI machine. The apparatus increases the magnetic field component of radiofrequency energy during signal transmission from the MRI machine to the specimen, and/or reception of signals from the specimen to the MRI machine. Use of the apparatus improves the images generated by the MRI machine, and/or reduces the time necessary for the MRI machine to capture the image. An isolator embodiment has a nonlinear resonator controllably configurable alternately into an isolation configuration and a transmission configuration, and a second resonator. The nonlinear resonator is coupled to a communications port and is substantially communicatively isolated from the second resonator when the nonlinear resonator is in the isolation configuration, and is communicatively coupled to the second resonator when the nonlinear resonator is in the transmission configuration.

Nonlinear and smart metamaterials useful to change resonance frequencies

A bilayer metamaterial silencer allows substantial fluid through the apparatus, while mitigating the propagation of sound through the apparatus, and while providing a form factor that is significantly more compact than previously-known devices. Moreover, illustrative embodiments allow a designer to specify one or both of the frequency or frequencies at which the apparatus mitigates sound propagation, and/or the bandwidth around the frequency or frequencies at which the apparatus mitigates sound propagation.

A passive apparatus including a plurality of resonators increases signal-to-noise ratio of radiofrequency signals emitted by a specimen and captured by an MRI machine. The apparatus increases the magnetic field component of radiofrequency energy during signal transmission from the MRI machine to the specimen, and/or reception of signals from the specimen to the MRI machine. Moreover, the apparatus enhances specimen safety by substantially avoiding unwanted generation of an electric field, or an increase in the electric field component of the RF energy. Use of the apparatus improves the images generated by the MRI machine, and/or reduces the time necessary for the MRI machine to capture the image.

Apparatus for improving magnetic resonance imaging

A door assembly for a light fixture that includes a door frame formed of two opposing frame sides connected to two opposing frame ends that collectively form an opening and define a door frame plane. A reflector is positioned within the door frame to span the opening and to extend downwardly through the door frame plane such that at least a portion of the reflector extends below the door frame plane.

LED light fixture

The invention relates to silk electronic components and methods for fabricating the same. The silk electronic components can be used as novel devices, such as implantable bioelectric and/or biophotonic devices, biosensors, surveillance devices, invisible cloaks, electromagnetic concentrators or antennas.

Silk electronic components

A reflection-mode waveplate for operation in the terahertz region by shifting the phase between two perpendicular polarization components of the light wave, comprising a ground plane; an array of polygonal unit cells; the polygonal unit cells comprising a polymer positioned between the ground plane and the exterior of the array of polygonal patches.

Electromagnetic composite-based reflecting terahertz waveplate

A light fixture includes a door frame, the door frame having at least one frame side and a reflector. The edge of the reflector engages a slot in the frame side, which includes at least one LED, to precisely position the reflector and the at least one LED relative to one another. The at least one frame side may also include a reflective kicker for reflecting light from the at least one LED onto the reflector. The reflector may include a semi-specular optical material, which specularly reflects some of the incoming light from the at least one LED and diffusely reflects other of the incoming LED light. The reflector may be collapsible for ease of transportation and shipping; the at least one frame side precisely positions the reflector and at least one LED during assembly and installation.

A luminaire includes at least one light source, at least one reflector having a reflector cavity and an optical element positioned to receive light reflected from the at least one reflector cavity. The luminaire does not include a mask or other structure located within the opening of the luminaire that would partially occlude light exiting the luminaire&#x2014;light can thus exit the luminaire unimpeded. In some embodiments, the at least one reflector cavity is semi toroidal. Moreover, in some embodiments, the optical element includes a reflective optical element, a refractive optical element or a combination thereof. Methods of lighting a surface are also described.

Constructive occlusion lighting system and applications thereof

An apparatus and method are disclosed for detecting terahertz radiation at room temperature. A detecting pixel includes a sub-wavelength split-ring resonator, and is mechanically coupled to (but thermally decoupled from) a substrate via a cantilever formed from two materials that have a significant mismatch in their thermal expansion coefficients. Incident radiation causes the split-ring resonator to resonate, thereby generating heat that is transferred to the cantilever, causing the cantilever to flex. An optical readout system includes a secondary light source, such as a laser, that shines on a reflective surface on the pixel, whereby a photodiode detects the reflected light and permits calculation of a relative deflection of the pixel in the nanometer range. An exemplary detector has a noise equivalent power rating of approximately 60 pW/&#x221a;Hz.

Thermal imager using metamaterials

Light fixture

Reflector for a luminaire

Growing community of inventors

Medford, MA, United States of America

Xin Zhang