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Showing 13 to 24 of 677 entries
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Modulation instability of incoherent beams in noninstantaneous nonlinear media.

Physical review letters

Soljacic M, Segev M, Coskun T, Christodoulides DN, Vishwanath A.
PMID: 11015940
Phys Rev Lett. 2000 Jan 17;84(3):467-70. doi: 10.1103/PhysRevLett.84.467.

We show that modulation instability can exist with partially spatially incoherent light beams in a noninstantaneous nonlinear environment. For such incoherent modulation instability to occur, the value of the nonlinearity has to exceed a threshold imposed by the degree...

Integer and fractional angular momentum borne on self-trapped necklace-ring beams.

Physical review letters

Soljacić M, Segev M.
PMID: 11177845
Phys Rev Lett. 2001 Jan 15;86(3):420-3. doi: 10.1103/PhysRevLett.86.420.

We present self-trapped necklace-ring beams that carry and conserve angular momentum. Such beams can have a fractional ratio of angular momentum to energy, and they exhibit a series of phenomena typically associated with rotation of rigid bodies and centrifugal...

Modulation instability and pattern formation in spatially incoherent light beams.

Science (New York, N.Y.)

Kip D, Soljacic M, Segev M, Eugenieva E, Christodoulides DN.
PMID: 11039925
Science. 2000 Oct 20;290(5491):495-8. doi: 10.1126/science.290.5491.495.

We report on the experimental observation of modulation instability of partially spatially incoherent light beams in noninstantaneous nonlinear media and show that in such systems patterns can form spontaneously from noise. Incoherent modulation instability occurs above a specific threshold...

Dark incoherent soliton splitting and "phase-memory" effects: Theory and experiment.

Physical review. E, Statistical physics, plasmas, fluids, and related interdisciplinary topics

Coskun TH, Christodoulides DN, Chen Z, Segev M.
PMID: 11969518
Phys Rev E Stat Phys Plasmas Fluids Relat Interdiscip Topics. 1999 May;59(5):R4777-80. doi: 10.1103/physreve.59.r4777.

We report on an experimental observation of dark incoherent soliton Y splitting. The effects of incoherence on the evolution of incoherent dark soliton doublets are investigated both theoretically and experimentally. We show that the dynamics of these incoherent self-trapped...

A Cryo-TEM Study of Protein-Surfactant Gels and Solutions.

Journal of colloid and interface science

Morén AK, Regev O, Khan A.
PMID: 10662512
J Colloid Interface Sci. 2000 Feb 15;222(2):170-178. doi: 10.1006/jcis.1999.6570.

Oppositely charged globular protein and surfactant systems, such as lysozyme-sodium dodecyl sulfate (SDS) and ovalbumin-dodecyltrimethylammonium chloride (DOTAC) form precipitate, gel, and colorless solution in water over a wide concentration range. Bluish solutions are also recognized in connection with the...

Collisions between optical spatial solitons propagating in opposite directions.

Physical review letters

Cohen O, Uzdin R, Carmon T, Fleischer JW, Segev M, Odouov S.
PMID: 12225028
Phys Rev Lett. 2002 Sep 23;89(13):133901. doi: 10.1103/PhysRevLett.89.133901. Epub 2002 Sep 09.

We formulate the theory describing the evolution and interactions between optical spatial solitons that propagate in opposite directions. We show that coherent collisions between counterpropagating solitons give rise to a new focusing mechanism resulting from the interference between the...

Discrete solitons in photorefractive optically induced photonic lattices.

Physical review. E, Statistical, nonlinear, and soft matter physics

Efremidis NK, Sears S, Christodoulides DN, Fleischer JW, Segev M.
PMID: 12443344
Phys Rev E Stat Nonlin Soft Matter Phys. 2002 Oct;66(4):046602. doi: 10.1103/PhysRevE.66.046602. Epub 2002 Oct 02.

We demonstrate that optical discrete solitons are possible in appropriately oriented biased photorefractive crystals. This can be accomplished in optically induced periodic waveguide lattices that are created via plane-wave interference. Our method paves the way towards the observation of...

Interactions between two-dimensional composite vector solitons carrying topological charges.

Physical review. E, Statistical, nonlinear, and soft matter physics

Musslimani ZH, Soljacić M, Segev M, Christodoulides DN.
PMID: 11415243
Phys Rev E Stat Nonlin Soft Matter Phys. 2001 Jun;63(6):066608. doi: 10.1103/PhysRevE.63.066608. Epub 2001 May 23.

We present a comprehensive study of interactions (collisions) between two-dimensional composite vector solitons carrying topological charges in isotropic saturable nonlinear media. We numerically study interactions between such composite solitons for different regimes of collision angle and report numerous effects...

Cavity pattern formation with incoherent light.

Physical review. E, Statistical, nonlinear, and soft matter physics

Buljan H, Soljacić M, Carmon T, Segev M.
PMID: 12935279
Phys Rev E Stat Nonlin Soft Matter Phys. 2003 Jul;68(1):016616. doi: 10.1103/PhysRevE.68.016616. Epub 2003 Jul 29.

We study the propagation dynamics of an incoherent light beam circulating in a passive cavity containing noninstantaneous nonlinear media. It is shown that patterns form in this cavity in spite of spatial incoherence of the light. We show that...

Coherence enhancement of spatially incoherent light beams through soliton interactions.

Optics letters

Coskun TH, Grandpierre AG, Christodoulides DN, Segev M.
PMID: 18064197
Opt Lett. 2000 Jun 01;25(11):826-8. doi: 10.1364/ol.25.000826.

We show that the spatial coherence of a partially incoherent light beam can be greatly enhanced through an energy-conserving interaction with an incoherent or a coherent dark spatial soliton. Computer simulations show that during this process a portion of...

Battery powered BION FES network.

Conference proceedings : ... Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Annual Conference

Schulman JH, Mobley JP, Wolfe J, Regev E, Perron CY, Ananth R, Matei E, Glukhovsky A, Davis R.
PMID: 17271251
Conf Proc IEEE Eng Med Biol Soc. 2004;2004:4283-6. doi: 10.1109/IEMBS.2004.1404193.

The Alfred Mann Foundation is completing development of a coordinated network of BION microstimulator/sensor (hereinafter implant) that has broad stimulating, sensing and communication capabilities. The network consists of a master control unit (MCU) in communication with a group of...

Cross-phase-modulation nonlinearities and holographic solitons in periodically poled photovoltaic photorefractives.

Optics letters

Cohen O, Murnane MM, Kapteyn HC, Segev M.
PMID: 16599223
Opt Lett. 2006 Apr 01;31(7):954-6. doi: 10.1364/ol.31.000954.

We show that the nonlinearity in periodically poled photovoltaic photorefractives can be solely of the cross-phase-modulation type. The effects of self-phase modulation and asymmetric energy exchange, which exist in homogeneously poled photovoltaic photorefractives, can be considerably suppressed by the...

Showing 13 to 24 of 677 entries