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Imaging and Sensing

The Optimization/Waves seminar is now part of the Imaging and Sensing track course credit !

For the Fall 2019 semester, seminars will take place on Thursdays in ACS 362B from 10am to 11am, with alternate topics.

Contact Prof. Petra (npetra@ucmerced.edu) for the Optimization, Prof. Carvalho (ccarvalho3@ucmerced.edu) for the Waves.

Fall 2019 

September 19th: Optimization

Alex Ho (grad student, Applied Mathematics, University of California, Merced)

Title Talk:  TBA

Ki-Tae Kim (postdoc, Applied Mathematics, University of California, Merced)

Title Talk:  TBA

September 26th: Waves

Arnold D. Kim, (Full Professor, Applied Mathematics, University of California, Merced)

Title Talk:  Research projects about the multiple scattering of light

Abstract: In this talk I give an overview of my research projects about the multiple scattering of light. Then I discuss two specific projects in detail. First, I discuss modeling nano cloaking structures in collaboration with Prof. Ghosh's lab. Then I discuss some recent work in the diffuse optical imaging of tissues using spatially modulated light.

October 3rd: Optimization

Noemi Petra (Assistant Professor, Applied Mathematics, University of California, Merced)

Title Talk:  Introduction to hIPPYlib

October 10th: Waves

Chrysoula Tsogka, (Full Professor, Applied Mathematics, University of California, Merced)
Title Talk:  Imaging in waveguides

Boaz Ilan, (Full Professor, Applied Mathematics, University of California, Merced)
Title Talk:  Nonlinear eigenvalue problems in nonlinear waves

October 17th: Optimization

Omar DeGuchy (grad student, Applied Mathematics, University of California, Merced)

Title Talk:  TBA

October 24th: Waves

Jay Sharping, (Professor, Physics, University of California, Merced)

Title Talk:  Tunable SRF cavities for 3D optomechanics

Abstract: Quantum mechanics is real! If you took a physics class on Quantum Mechanics, they (should have) told you to consider a mass on a spring and (should have) showed that the energy spectrum for that thing is quantized. Over the past 10 years or so we have finally been able to do just that in the lab. One of my research goals is to combine low loss oscillators such as optical or microwave cavities with mechanical oscillators in hopes of one day recognizing quantum behavior in large oscillators. In this talk I will (hopefully) get you excited about the prospects of this effort and then share designs, simulations and experiments with high-Q 3-dimensional cavities. I’ll give you a status report on my group’s journey to coupling these cavities to mechanical oscillators. 

October 31st: Optimization

TBA

Title Talk:  TBA

November 7th: Waves

Zoïs Moitier, (Postdoc, Applied Mathematics, University of California, Merced)

Title : Asymptotic expansions of Whispering Gallery Modes optical micro-cavities

Abstract: In this talk we study the resonance frequencies of bidimensional optical cavities. More specifically, we are interested in whispering-gallery modes (modes localized along the cavity boundary with a large number of oscillations). The first part deals with the numerical computation of resonances by the finite element method using perfectly matched layers, and with a sensibility analysis in the three following situations: an unidimensional problem, a reduction of the rotationally invariant bidimensional case, and the general case. The second part focuses on the construction of asymptotic expansions of whispering-gallery modes as the number of oscillations along of boundary goes to infinity. We start by considering the case of a rotationally invariant problem for which the number of oscillations can be interpreted as a semiclassical parameter by means of an angular Fourier transform. Next, for the general case, the construction uses a phase-amplitude ansatz of WKB type which leads to a generalized Schrödinger operator. Finally, the numerically computed resonances obtained in the first part are compared to the asymptotic expansions made explicit by the use of a computer algebra software.

November 14th: Optimization

Tucker Hartland  (grad student, Applied Mathematics, University of California, Merced)

Title Talk:  TBA

Radoslav Vuchkov (grad student, Applied Mathematics, University of California, Merced)

Title Talk:  TBA

November 21st: Waves

Cory MacCullough, (graduate student, Applied Mathematics, University of California, Merced)

Title Talk:  TBA

Imran Khan, (graduate student, Physics, University of California, Merced)

Title Talk:  TBA

​December 5th: Optimization

TBA

Title Talk:  TBA

 

Optimization Seminars

Waves Seminars