Accession Number : ADA514737
Title : Research Studies on Electromagnetically Induced Transparency
Descriptive Note : Final rept. 1 Nov 2006-31 Oct 2009
Corporate Author : LELAND STANFORD JUNIOR UNIV CA
Personal Author(s) : Harris, S. E.
Report Date : 20 JAN 2010
Pagination or Media Count : 94
Abstract : The overall theme of this work has been the development and utilization of new sources of radiation that produce time energy entangled biphotons that are both much longer and much shorter than those that now exist. We have learned to produce biphotons with temporal lengths greater than 500 nanoseconds and linewidths smaller than the natural linewidth of target atoms. We have demonstrated the use of telecommunication light modulators to modulate single photons and also a novel technique for measuring the temporal length of biphoton wave packets. The technique is based on the use of synchronously driven fast modulators and slow detectors. By measuring the coincidence count rate between single photon counting modules as a function of the sinusoidal modulation frequency we obtain the Fourier transform of the biphoton wave function. Accomplishments in the area of ultra-short biphotons include the suggestion for using the method of chirp and compress at the single photon level, and the first demonstration of resonance sum frequency generation with paired photons. We have demonstrated a new quantum effect that we term as nonlocal modulation were phase modulators at distant locations, acting on the photons of an entangled pair, interfere to determine the apparent depth of modulation.
Descriptors : *ELECTROMAGNETISM , *TRANSPARENCE , *PHOTON BOMBARDMENT , *QUANTUM THEORY , DEMONSTRATIONS , ENERGY , COUNTING METHODS , RATES , ATOMS , NONLINEAR OPTICS , TARGETS , DEPTH , TIME , FREE ELECTRON LASERS , RESONANCE , PHOTONS , TELECOMMUNICATIONS , WAVE FUNCTIONS , REMOTE AREAS , MODULATION , MODULATORS , LIGHT MODULATORS , PHASE MODULATION , WAVE PACKETS , SPECTRAL LINES , TRANSPARENCIES , COINCIDENCE COUNTING , CHIRP FILTERS , ELECTROOPTICS , DETECTORS , SOURCES , FOURIER TRANSFORMATION , FREQUENCY
Subject Categories : ELECTRICAL AND ELECTRONIC EQUIPMENT
ELECTROOPTICAL AND OPTOELECTRONIC DEVICES
ELECTRICITY AND MAGNETISM
NUCLEAR PHYSICS & ELEMENTARY PARTICLE PHYSICS
QUANTUM THEORY AND RELATIVITY
Distribution Statement : APPROVED FOR PUBLIC RELEASE