Events Calendar View

• Observatory Open House Oct 12, 2018

  Observatory Viewing

  

  Guest: Dr. Robin Shelton and Dr. Scott Shaw, UGA Department of Physics and Astronomy
  Friday, October 12, 2018 8:00 pm - 9:00 pm
  Location: UGA Observatory (4th floor Physics Building)

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  We will be having another public viewing on October 12, 2018.

  If the skies are clear, we will be looking at the crescent Moon, Saturn, and Mars.

  Because of the limited space in the dome, you must have a reservation to come to this showing. We will begin taking reservations for this viewing on Tuesday, August 14th at 12:00pm. Click here to make a reservation.

  The observatory is located at the top of the Physics building. To get to the observatory take the elevator to the 4th floor. A guide will meet you on the 4th floor and direct your group to the stairway that leads to the observatory. As the weather can be unpredictable, we might not know whether a viewing will be possible until shortly before the event begins.

  If you need more information please call 706-542-2485.

• CSP Lunch Seminar Oct 16, 2018

  Application of Molecular-Orbital Close-Coupling method (MOCC) to study H-H+ elastic collision

  

  Guest: Ruihan Wang, Center for Simulational Physics, UGA
  Tuesday, October 16, 2018 12:30 pm - 1:30 pm
  Location: CSP Conference Room (322)

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• Departmental Colloquium Oct 18, 2018

  Leveraging Optical Phase Change Materials on Silicon Photonic Devices

  

  Guest: Prof. Sharon Weiss, Department of Electrical Engineering, Vanderbilt University
  Thursday, October 18, 2018 3:30 pm - 4:30 pm
  Location: Physics Auditorium (202)

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  Silicon photonics is considered to be the leading platform to achieve faster data transfer speeds on-chip. However, the weak electro-optic coefficient of silicon limits the maximum achievable single channel data rates. A hybrid solution consisting of a silicon photonic backbone and an incorporated optical phase change material that provides improved optical functionality may provide the solution for realizing broadband, low power, small footprint on-chip photonic devices capable of achieving record modulation speed. In this presentation, we discuss theoretical and experimental work integrating vanadium dioxide in electro-optic and all-optical silicon photonic devices. Future directions will also be discussed.

• Applied Physics Seminar Oct 19, 2018

  Deep-subwavelength Confinement in Dielectric Optical Resonators

  

  Guest: Professor Sharon M. Weiss, Department of Electrical Engineering, Vanderbilt University
  Friday, October 19, 2018 12:20 pm - 1:20 pm
  Location: CSP Conference Room (322)

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  The ability to highly localize light with strong electric field enhancement is critical for enabling higher-efficiency light sources, modulators, and solar cells, and can dramatically enhance nonlinear properties. While deep-subwavelength modes can be realized with plasmonic resonators, large losses in these metal structures preclude most practical applications. In this presentation, we discuss an approach enabling two levels of spatial localization of photons in a dielectric material, leading to the demonstration of a silicon bowtie photonic crystal structure that supports mode volumes commensurate with plasmonic elements and quality factors that reveal ultralow losses. Both the electromagnetics principles underlying the design of the bowtie photonic crystal and potential applications of the structure will be addressed.

• CSP Lunch Seminar Oct 23, 2018

  Conformational mechanics for polymers doubly-grafted to a homogeneous substrate

  

  Guest: Shengming Zhang, Center for Simulational Physics, UGA
  Tuesday, October 23, 2018 12:30 pm - 1:30 pm
  Location: CSP Conference Room (322)

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• Departmental Colloquium Oct 25, 2018

  Computational Topological Photonics Using the Finite-Difference Time-Domain Method

  

  Guest: Prof. William Dennis and Jim Heneghan, Department of Physics and Astronomy, UGA
  Thursday, October 25, 2018 3:30 pm - 4:30 pm
  Location: Physics Auditorium (202)

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  In this talk we describe our efforts to use the Finite-Difference Time-Domain (FDTD) method to model nanostructures that may have topological photonics applications. Our starting point is an attempt to reproduce some of the results of Raghu and Haldane [ Phys. Rev. A. 78, 033834 (2008)]. We will describe our approach, some of the technical challenges of using the FDTD method for this application, their resolution as well as discuss our progress to date. We will conclude with a discussion of next steps, future directions and how this work can support experimental work in this area.

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