Pure-state single-photon wave-packet generation by parametric down-conversion in a distributed microcavity
- Oregon Center for Optics and Department of Physics, University of Oregon, Eugene, Oregon 97403 (United States)
We propose an optical parametric down-conversion (PDC) scheme that does not suffer a trade-off between the state purity of single-photon wave packets and the rate of packet production. This is accomplished by modifying the PDC process by using a microcavity to engineer the density of states of the optical field at the PDC frequencies. The high-finesse cavity mode occupies a spectral interval much narrower than the bandwidth of the pulsed pump laser field, suppressing the spectral correlation, or entanglement, between signal and idler photons. Spectral filtering of the field occurs prior to photon creation rather than afterward as in most other schemes. Operator-Maxwell equations are solved to find the Schmidt-mode decomposition of the two-photon states produced. Greater than 99% pure-state packet production is predicted to be achievable.
- OSTI ID:
- 20718224
- Journal Information:
- Physical Review. A, Vol. 72, Issue 2; Other Information: DOI: 10.1103/PhysRevA.72.023825; (c) 2005 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 1050-2947
- Country of Publication:
- United States
- Language:
- English
Similar Records
Generation of entangled photons by trapped ions in microcavities under a magnetic field gradient
Spontaneous parametric down-conversion in a three-level system