MEMs

Spatial Resolution and Contrast of a Focused Diffractive Plenoptic Camera

The concept of an imaging system that captures both spatial and spectral information has existed for a while. An example of one such imaging system that encodes both location and wavelength into an image is a Fourier Transform Spectrometer (FTS).

Posted in: Briefs, Aerospace, Cameras, Imaging, Optical Components, Optics
Read More >>

Integrated Magneto-Optical Devices for On-Chip Photonic Systems

The magneto-optical (MO) oxide layer consists of (Bi,Y)3Fe5O12 or BiYIG, bismuth garnet. This material was selected because it has a better figure of merit than the CeYIG previously used, especially at lower wavelengths (1310 nm vs. 1550 nm). A top-down deposition process was developed in which BiYIG/YIG stacks are grown on the Si waveguide with YIG on top. The stack is annealed at 800°C/5 min to crystallize both layers, with the YIG templating the BiYIG leading to garnet phases rather than other oxides, and the BiYIG is directly on the Si waveguide. Initial attempts led to a film with Bi oxide phases, because the Bi was in excess and could not escape during the anneal as occurs in Si/YIG/BiYIG stacks. Hence the composition was adjusted to include slightly more Fe, which yielded films with only garnet peaks.

Posted in: Briefs, Aeronautics, Aerospace, Aviation, Electronic Components, Electronics, Electronics & Computers, Manufacturing & Prototyping, Materials, Optical Components, Optics, Photonics, Semiconductors & ICs
Read More >>

Low Power Optical Phase Array Using Graphene on Silicon Photonics

Despite enormous advances in integrated photonics over the last decade, an efficient integrated phase delay remains to be demonstrated. This problem is fundamental – most monolithic thin film deposition relies on centro symmetric materials (such as silicon, silicon dioxide, silicon nitride), which by definition do not have an electro-optic effect. Such materials have been shown to be excellent transparent materials, however they are either optically passive, or rely on very small plasma dispersion effect or power-hungry thermo-optic effect for tunability. These phase change materials have losses associated due to heating or carrier injection in the waveguides. This research shows that graphene can be used to provide electro-optic properties to traditionally passive optical materials.

Posted in: Briefs, Aerospace, Electronic Components, Electronics, Electronics & Computers, Materials, Optical Components, Optics, Photonics
Read More >>

Ultracompact, High-Speed Field-Effect Optical Modulators

The major goals of this research project included two parts. First, an ultracompact plasmonic electro-optical (EO) modulator was to be developed and investigated for efficient intensity modulation. Second, an ultracompact and high-speed EO modulator based on a dielectric platform was to be developed for straightforward integration with existing CMOS technology. Both modulators were targeted to facilitate next-generation interconnects for integrated photonic circuits.

Posted in: Briefs, Aeronautics, Aerospace, Aviation, Joining & Assembly, Mechanical Components, Optical Components, Optics, Photonics, Semiconductors & ICs
Read More >>

Launching Graphene to the Stratosphere

Researchers are testing the properties of graphene after it has been launched into the stratosphere. Two-dimensional graphene has a unique combination of being extremely flexible, harder than diamond, and stronger than steel.

Posted in: INSIDER, News, Defense
Read More >>

Device Can Prevent Aircraft Accidents

A new device can increase aircraft safety during takeoff. During the first 10 seconds of the takeoff roll, the device predicts if the aircraft will reach the sufficient speed for taking off. The idea behind the innovation can be adapted both for small aircraft and large jets.

Posted in: INSIDER, News, Defense
Read More >>

Rockwell Collins Unveils Combat Targeting and Communications Gateway

Rockwell Collins has unveiled FasTAK™, a new tactical combat targeting system and secure communications gateway for success in today’s digital battlefield.

Posted in: INSIDER, News, Defense
Read More >>

Tail-Controlled Rocket Demonstrates Near-Vertical Impact at Extended Range

After six years of extensive research, engineers at the U.S. Army Aviation and Missile Research, Development, and Engineering Center have conducted a successful test flight of an advanced tail-controlled missile system.

Posted in: INSIDER, News, Defense
Read More >>

Sensing Platform Manages Aircraft Corrosion

Called the Weather Instrumentation and Specialized Environmental Monitoring Platform (WISE-MP), a device being developed by the Air Force can measure conditions that can be detrimental to aircraft such as pollutants, salt, and moisture. Anticipating corrosive conditions before they can have a detrimental effect can lead to significant cost savings and less aircraft downtime.

Posted in: INSIDER, News, Defense
Read More >>

Insect-Inspired Drone Deforms on Impact

A hybrid origami drone can be stiff or flexible depending on the circumstances. When airborne, the structure is stiff enough to carry its own weight and withstand the thrust of the propellers. But if the drone runs into something, it becomes flexible in order to absorb the shock and therefore minimize any damage.

Posted in: INSIDER, News, Defense
Read More >>