Doctor of Philosophy in Physics- Nonlinear Optics and Photonics

Research topics include nonlinear light-matter interaction that enables the control of light with light, four-wave mixing, phase conjugation, and wavelength conversion. We develop materials for second- and third-order nonlinear optics in particular organic molecular assemblies, and in general study materials and effects for photonics and optoelectronics. Examples include single crystals in glass, photonic crystals, holey and other specialty fibers, waveguides, resonant Brillouin scattering, and ferroelectric domain patterning for quasi phase matching. There is also considerable work on applications of photonics to biological systems, near-field optics, and thermal radiation.The Ph D program includes a set of core courses, including some at the advanced graduate level that provide the broad background in physics that is so important in the long run, specialized courses relevant to the research area of the student, and the research for the Ph D dissertation. Students entering with graduate level work at other institutions may include relevant courses taken at the other institutions in their proposal for candidacy, which includes all their course preparation as well as the research proposal for the dissertation. The Department of Physics at Lehigh University offers programs leading to the B.A. in astronomy, the B.S. in astrophysics, and to the B.A., B.S., M.S., and Ph.D. degrees in physics, as well as a summer research program for undergraduates. Research areas include astronomy and astrophysics, atomic, molecular, and optical physics, biophysics, computational physics, condensed-matter physics, general relativity, cosmology, and string theory, high-energy and accelerator physics, nano science, non-linear optics and photonics, plasma physics, soft-condensed matter and complex fluids, and statistical physics.

Official transcripts
2 letters of recommendation
Personal statement and CV
IELTS Secion Minimums- 6.5
Reading 6.5
Listening 6
Speaking 7.5
Writing 6.5

TOEFL Section Minimums- 85
Reading 21
Listening 15
Speaking 24
Writing 25

Duolingo Overall Minimums - 115