Host: Zecheng Zhang.
Room: Love 0231 or online.
Zoom Link: will be avaiable up on request.
Time: 03:05 pm to 04:05 pm. It is weekly on Tuesday, see below for the detailed schedule.
| Date | Speaker | Abstract of the Talk |
|---|---|---|
| Jan 7 | Zecheng Zhang | Introduction to the ACM seminar of Spring 2025, speaker informations, and what to know. |
| Jan 21 | Savvas Sardelis (FSU) | The idea of having solitary waves in Kerr nonlinear media arising in the presence of only quartic dispersion was briefly theoretically considered in the early 90's and then almost forgotten until its experimental discovery in 2016. These so-called pure-quartic solitons (PQS) were observed in a silicon photonic crystal waveguide where quartic dispersion was the dominant dispersion effect and all the other dispersion orders were negligible. In this talk, we present a new class of soliton based on the interaction of parity-time (PT) symmetric nonlinearity and quartic dispersion or diffraction. This novel kind of soliton is related to the recently discovered PQS, that arises from the balance of Kerr nonlinearity and quartic dispersion, through a complex coordinate shift. We find that the PT-symmetric PQS are linearly stable and present important differences with respect to its Hermitian (Kerr) counterpart, including a nontrivial phase structure, a skewed spectral intensity, and a higher power for the same propagation constant. |
| Jan 28 | Siming Liang (FSU) | |
| Feb 4 | SeongHee Jeong (FSU) | |
| Feb 11 | Nick Dexter (FSU) | |
| Feb 18 | Stefanie Guenther (LLNL) | |
| Feb 25 | Haoyang Qian (FSU) | |
| March 18 (Distinguish Invited Speaker) | Yuanzhe Xi (Emory) | |
| March 25 | ||
| Apr 1 | ||
| Apr 8 | ||
| Apr 15 | Mark Sussman (FSU) | |
| Apr 22 (Distinguish Invited Speaker) | Xiao Liu (GaTech) | TBA |