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.


Full Text : http://www.dtic.mil/get-tr-doc/pdf?AD=ADA514737


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
      OPTICS
      NUCLEAR PHYSICS & ELEMENTARY PARTICLE PHYSICS
      QUANTUM THEORY AND RELATIVITY


Distribution Statement : APPROVED FOR PUBLIC RELEASE