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The modulator converts an electronic data signal to an optical one. [Image: Second Bay Studios/Harvard SEAS]Integrated PhotonicsA Chip-Scale Electro-Optic ModulatorTeam creates a low-loss lithium niobate device that runs at CMOS-compatible voltageElectro-optic modulators, which convert electronic data to optical signals, are key components of telecom networks. For decades, lithium niobate (LN...

12/01/2018 15:13

The Optical Illusions of Cosmetics

  Cosmetic products—foundation, eye shadow, blush, mascara and lipstick—carry with them the promise of transformation. Every morning around the world, millions of people open small tubes, jars and plastic cases in an effort to accentuate their features, rewind the clock, or simply express themselves in unique ways. But how do cosmetics create their illusory effects? If...

07/01/2010 00:00

Archaeophotonics: Lasers Unveil the Past

Pablo Loza-Alvarez (right) and David Artigas in the lab When people think of archaeology, they often conjure images of adventurers such as Indiana Jones, who spend most of their time searching for mysterious ancient objects. We forget that the main objective in archaeology is to uncover the history hidden behind the objects, in the hope that they can help us understand a small...

07/01/2007 00:00

The Magnetic eye of the iron tiger

Light polarization from a thin film of ferrofluid obtained with the magnetic field of two cylindrical magnets, placed side by side with poles in opposition. The pattern obtained with the experiment is shown in (a) with the small magnet at the bottom. In (b) we can see the simulation of this pattern magnet using the Fresnel–Kirchhoff diffraction theory. More information about this work can...

11/20/2019 06:00