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Showing 1 to 12 of 256 entries
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Tailoring high-temperature radiation and the resurrection of the incandescent source.

Nature nanotechnology

Ilic O, Bermel P, Chen G, Joannopoulos JD, Celanovic I, Soljačić M.
PMID: 26751172
Nat Nanotechnol. 2016 Apr;11(4):320-4. doi: 10.1038/nnano.2015.309. Epub 2016 Jan 11.

In solar cells, the mismatch between the Sun's emission spectrum and the cells' absorption profile limits the efficiency of such devices, while in incandescent light bulbs, most of the energy is lost as heat. One way to avoid the...

Laser-Induced Linear-Field Particle Acceleration in Free Space.

Scientific reports

Wong LJ, Hong KH, Carbajo S, Fallahi A, Piot P, Soljačić M, Joannopoulos JD, Kärtner FX, Kaminer I.
PMID: 28894271
Sci Rep. 2017 Sep 11;7(1):11159. doi: 10.1038/s41598-017-11547-9.

Linear-field particle acceleration in free space (which is distinct from geometries like the linac that requires components in the vicinity of the particle) has been studied for over 20 years, and its ability to eventually produce high-quality, high energy...

Effects of surface diffusion on high temperature selective emitters.

Optics express

Peykov D, Yeng YX, Celanovic I, Joannopoulos JD, Schuh CA.
PMID: 25969039
Opt Express. 2015 Apr 20;23(8):9979-93. doi: 10.1364/OE.23.009979.

Using morphological and optical simulations of 1D tantalum photonic crystals at 1200K, surface diffusion was determined to gradually reduce the efficiency of selective emitters. This was attributed to shifting resonance peaks and declining emissivity caused by changes to the...

Optically Thin Metallic Films for High-Radiative-Efficiency Plasmonics.

Nano letters

Yang Y, Zhen B, Hsu CW, Miller OD, Joannopoulos JD, Soljačić M.
PMID: 27244596
Nano Lett. 2016 Jul 13;16(7):4110-7. doi: 10.1021/acs.nanolett.6b00853. Epub 2016 Jun 10.

Plasmonics enables deep-subwavelength concentration of light and has become important for fundamental studies as well as real-life applications. Two major existing platforms of plasmonics are metallic nanoparticles and metallic films. Metallic nanoparticles allow efficient coupling to far field radiation,...

Alternative paradigm for physical computing.

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

Appelbaum I, Joannopoulos JD, Narayanamurti V.
PMID: 12513434
Phys Rev E Stat Nonlin Soft Matter Phys. 2002 Dec;66(6):066612. doi: 10.1103/PhysRevE.66.066612. Epub 2002 Dec 30.

We identify a different class of physical systems that are able to form universal logic gates. By analogy with Si(100) surface dimers, we present a model to analyze the trajectories of the fixed points (interpreted as logic states) under...

Cerenkov radiation in photonic crystals.

Science (New York, N.Y.)

Luo C, Ibanescu M, Johnson SG, Joannopoulos JD.
PMID: 12532010
Science. 2003 Jan 17;299(5605):368-71. doi: 10.1126/science.1079549.

In a conventional material, the coherent Cerenkov radiation due to a moving charged particle is associated with a velocity threshold, a forward-pointing radiation cone, and a forward direction of emission. We describe different behavior for the Cerenkov radiation in...

Color of shock waves in photonic crystals.

Physical review letters

Reed EJ, Soljacić M, Joannopoulos JD.
PMID: 12785897
Phys Rev Lett. 2003 May 23;90(20):203904. doi: 10.1103/PhysRevLett.90.203904. Epub 2003 May 23.

Unexpected and stunning new physical phenomena result when light interacts with a shock wave or shocklike dielectric modulation propagating through a photonic crystal. These new phenomena include the capture of light at the shock wave front and reemission at...

Nonlinear photonic crystal microdevices for optical integration.

Optics letters

Soljacić M, Luo C, Joannopoulos JD, Fan S.
PMID: 12703925
Opt Lett. 2003 Apr 15;28(8):637-9. doi: 10.1364/ol.28.000637.

A four-port nonlinear photonic crystal system is discussed that exhibits optical bistability with negligible backscattering to the inputs, making it particularly suitable for integration with other active devices on the same chip. Devices based on this system can be...

Polarization-independent linear waveguides in 3D photonic crystals.

Physical review letters

Lidorikis E, Povinelli ML, Johnson SG, Joannopoulos JD.
PMID: 12906480
Phys Rev Lett. 2003 Jul 11;91(2):023902. doi: 10.1103/PhysRevLett.91.023902. Epub 2003 Jul 10.

Using a symmetry-based approach, we have designed polarization-independent waveguides in a 3D photonic crystal. A comprehensive series of numerical experiments, involving the propagation of pulsed signals through long straight waveguide sections and sharp bends, quantitatively evaluates the bend-transmission coefficient...

Anomalous dispersion relations by symmetry breaking in axially uniform waveguides.

Physical review letters

Ibanescu M, Johnson SG, Roundy D, Luo C, Fink Y, Joannopoulos JD.
PMID: 14995240
Phys Rev Lett. 2004 Feb 13;92(6):063903. doi: 10.1103/PhysRevLett.92.063903. Epub 2004 Feb 12.

We show that modes of axially uniform waveguides of arbitrary cross section can be made to have anomalous dispersion relations resulting from strong repulsion between two modes. When the axial wave vector k is 0, the two modes have...

A three-dimensional optical photonic crystal with designed point defects.

Nature

Qi M, Lidorikis E, Rakich PT, Johnson SG, Joannopoulos JD, Ippen EP, Smith HI.
PMID: 15175746
Nature. 2004 Jun 03;429(6991):538-42. doi: 10.1038/nature02575.

Photonic crystals offer unprecedented opportunities for miniaturization and integration of optical devices. They also exhibit a variety of new physical phenomena, including suppression or enhancement of spontaneous emission, low-threshold lasing, and quantum information processing. Various techniques for the fabrication...

Comment on "Observation of the inverse Doppler effect".

Science (New York, N.Y.)

Reed EJ, Soljacic M, Ibanescu M, Joannopoulos JD.
PMID: 15297649
Science. 2004 Aug 06;305(5685):778; author reply 778. doi: 10.1126/science.305.5685.778a.

No abstract available.

Showing 1 to 12 of 256 entries