FREE COFFEE AND DONUTS PROVIDED!
WHAT: Manipulating light at single wavelength or deep sub-wavelength
scales open new possibilities for optical physics
WHO: Jung-Tsung Shen (Stanford)
WHEN: 3:40 PM FRI 24 APRIL
WHERE: 345 NICHOLSON HALL
ABSTRACT:
The capability of manipulating light using
deep sub-wavelength structures opens up new device and material
possibilities. In this talk, I will describe our recent research in
this aspect and give two examples enabled by such capability. The first
example is the strongly correlated photon transport in nano-photonic
waveguides. Photons normally do not directly interact with each other,
yet many practical considerations, such as quantum communication and
information processing, and other novel optoelectronics devices require
the use of entangled photons. I will describe how to deterministically
generate and manipulate strong photon-photon interactions via a
two-level system. Such strong interactions have profound consequences
on the photon transport properties. A deep understanding of the
mechanism also provides a key to achieve low power optical switching at
single-photon level. It also represents the most fundamental form of
nonlinear optics. Moreover, the configuration is well-suited for
on-chip all solid-state implementations.
In
the second part of my talk, I will describe how to design novel
metamaterials by exploiting the electromagnetic states at subwavelength
scales. In particular, I will discuss the mechanisms and properties of
a special class of metamaterials -- broadband, ultra-high refractive
index metamaterials. Such artificial structures will be useful in many
applications such as subwavelength lithography and imaging, broadband
slow-light, and sensitive interferometer.
BIO:
Dr. Jung-Tsung Shen is currently a research associate in physical
science at Ginzton Lab at Stanford University, working on photon
transport in nano-photonics, metamaterials, plasmonics, and thermal and
energy transfer in nano-structures. He obtained his PhD degree in
physics in 2003 from MIT where he worked on theoretical and
computational investigation on electron-hole plasma, laser gain
profile, and metamaterials. He was also a graduate scholar at Bell Labs
from year 1998 - 2001.