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Excelitas Technologies Corp. - X-Cite Vitae LB 11/24

Laser Spectroscopy Overcomes Measurement Challenge

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PHILADELPHIA, Sept. 12, 2013 — A "remarkably simple" laser-based approach overcomes the challenge of measuring key aspects of electron behavior while designing ever-smaller components -- which could allow cellphones, laptops and tablets to get increasingly thinner and more energy efficient. “One of the most important features of the interface [between two semiconductor materials] is the height of the energy step required for the electron to climb over, known as band offset. Current methods for measuring this step height in planar devices are not practical for nanoscale devices, however, so we set off to find a...Read full article

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    Published: September 2013
    Glossary
    electron
    A charged elementary particle of an atom; the term is most commonly used in reference to the negatively charged particle called a negatron. Its mass at rest is me = 9.109558 x 10-31 kg, its charge is 1.6021917 x 10-19 C, and its spin quantum number is 1/2. Its positive counterpart is called a positron, and possesses the same characteristics, except for the reversal of the charge.
    laser spectroscopy
    That part of the science involved in the study of the theory and interpretation of spectra that uses the unique characteristics of the laser as an integral part in the development of information for analysis. Raman spectroscopy and emission spectroscopy are two areas where lasers are used.
    nano
    An SI prefix meaning one billionth (10-9). Nano can also be used to indicate the study of atoms, molecules and other structures and particles on the nanometer scale. Nano-optics (also referred to as nanophotonics), for example, is the study of how light and light-matter interactions behave on the nanometer scale. See nanophotonics.
    optoelectronic
    Pertaining to a device that responds to optical power, emits or modifies optical radiation, or utilizes optical radiation for its internal operation. Any device that functions as an electrical-to-optical or optical-to-electrical transducer. Electro-optic often is used erroneously as a synonym.
    photocurrent
    The current that flows through a photosensitive device, such as a photodiode, as the result of exposure to radiant power.
    transistor
    An electronic device consisting of a semiconductor material, generally germanium or silicon, and used for rectification, amplification and switching. Its mode of operation utilizes transmission across the junction of the donor electrons and holes.
    AlabamaAmericasband offsetcellphoneCommunicationsDrexel UniversityelectronenergyEuropegreen photonicsGuannan ChenIMM-CNRIsraelItalyJonathan Spanierlaptoplaser spectroscopyLehigh UniversityLight SourcesnanonanoscalenanowireNegev Nuclear Research CenteroptoelectronicPennsylvaniaphotocurrentResearch & TechnologyspectroscopyTest & MeasurementtransistorUniversity of AlabamaUniversity of SalentoWeizmann Institute of ScienceLasersLEDs

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