John Donohue of the Department of Physics and Astronomy is defending his thesis:
Ultrafast manipulation of single photons using dispersion and sum-frequency generation
John is supervised by Associate Professor Kevin Resch.
Generation and Spectral Characterization of High-Purity Biphotons
Franco Wong, Massachusetts Institute of Technology
Spectrally factorable biphotons are highly desirable for many photonic quantum information processing tasks such as quantum computation, boson sampling, and quantum repeaters. We generate biphotons with spectral purity of 99%, the highest to date without any spectral filtering, by pulsed spontaneous parametric downconversion in a custom-fabricated PPKTP crystal under extended Gaussian phase-matching conditions.