Accession Number : ADA541111


Title :   Silicon-nanocrystal Optoelectronic Kerr Effect for Complementary Metal-oxide Semiconductor (CMOS) Compatible Optical Switching


Corporate Author : ARMY RESEARCH LAB ABERDEEN PROVING GROUND MD


Personal Author(s) : Bambba, Neal K ; Bickford, Justin R ; Preble, Stefan F


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a541111.pdf


Report Date : Apr 2011


Pagination or Media Count : 18


Abstract : There is a broad Army need to quickly transfer large amounts of data from sensors to processors on a wide variety of systems. Complementary metal-oxide semiconductor (CMOS) compatible optical intra-chip data communication systems would enable this data flow by increasing data rates and reducing circuit size and power. We investigated the fabrication of a monolithic CMOS-compatible optoelectronic silicon (Si) modulator for intra-chip communication. The modulator is designed to take advantage of the large Kerr effect that has been reported in Si-nanocrystals imbedded in oxide (Si-nc). The expected refractive index change versus applied voltage was calculated for the design, and an index change of 2 x 10(exp-4) is enough to modulate the light, corresponding to a voltage of only 0.5-1.5 V. Confinement of light in the waveguide and microdisk is accomplished via a slot waveguide design. Several samples of Si-rich oxide films were deposited by reactively sputtering Si in the presence of oxygen, plasma enhanced chemical vapor deposition (PECVD), and low pressure chemical vapor deposition (LPCVD), as well as spin casting of hydrogen silsesquioxane (HSQ). The nonlinear index of these samples was characterized by an optical Zscan measurement using a short pulse fiber laser with a 1.5-micrometers wavelength.


Descriptors :   *KERR MAGNETOOPTICAL EFFECT , *OPTICAL SWITCHING , *COMPLEMENTARY METAL OXIDE SEMICONDUCTORS , CHEMICAL VAPOR DEPOSITION , PULSED LASERS , OXYGEN , NONLINEAR SYSTEMS , SLOTS , CASTING , SPINNING(MOTION) , CONFINEMENT(GENERAL) , CIRCUITS , DATA RATE , SPUTTERING , MODULATORS , SHORT PULSES , VOLTAGE , REFRACTIVE INDEX , DATA PROCESSING , FIBERS


Subject Categories : Electrooptical and Optoelectronic Devices
      Electricity and Magnetism
      Solid State Physics


Distribution Statement : APPROVED FOR PUBLIC RELEASE