44 Result(s)

Article

Two Dimensional Photonic Crystal Modes and Resonances in Three-dimensional Structures

We present three-dimensional analysis of two-dimensional guided resonances in photonic crystal slab structures. This analysis leads to a new understanding of the complex spectral properties of such systems. Sp...

Shanhui Fan, J. D. Joannopoulos in MRS Online Proceedings Library (2011)

Article

Two Dimensional Photonic Crystal Modes and Resonances in Three-dimensional Structures

We present three-dimensional analysis of two-dimensional guided resonances in photonic crystalslab structures. This analysis leads to a new understanding of the complex spectral properties of such systems. Spe...

Shanhui Fan, J. D. Joannopoulos in MRS Online Proceedings Library (2011)

Article

Multimaterial piezoelectric fibres

Fibres are typically used as passive devices, whether in fibre-optical cables used in telecommunciations or as yarns for clothing. The demonstration of polymer-based piezoelectric fibres that can be drawn to t...

S. Egusa, Z. Wang, N. Chocat, Z. M. Ruff, A. M. Stolyarov, D. Shemuly… in Nature Materials (2010)

Article

Observation of unidirectional backscattering-immune topological electromagnetic states

A hallmark of the quantum Hall effect, and a consequence of nontrivial topology of the electronic properties of systems manifesting this phenomenon, is the existence of so-called chiral edge states. These are ...

Zheng Wang, Yidong Chong, J. D. Joannopoulos, Marin Soljačić in Nature (2009)

Article

A transient semimetallic layer in detonating nitromethane

Despite decades of research, the microscopic details and extreme states of matter found within a detonating high explosive have yet to be elucidated. Here we present the first quantum molecular-dynamics simula...

Evan J. Reed, M. Riad Manaa, Laurence E. Fried, Kurt R. Glaesemann… in Nature Physics (2008)

Chapter and Conference Paper

DEFECT-RELATED ISSUES IN HIGH-K DIELECTRICS

The roles of impurities and point defects are again coming to the forefront as new materials, such as high-k dielectrics, and novel device structures (e.g., double gate MOSFETs) are introduced in new generatio...

SOKRATES T. PANTELIDES, M.H. EVANS… in Defects in High-k Gate Dielectric Stacks (2006)

Article

Roughness losses and volume-current methods in photonic-crystal waveguides

We present predicted relative scattering losses from sidewall roughness in a strip waveguide compared to an identical waveguide surrounded by a photonic crystal with a complete or incomplete gap in both 2d and...

S. G. Johnson, M. L. Povinelli, M. Soljačić, A. Karalis, S. Jacobs… in Applied Physics B (2005)

Chapter

Modeling at the Speed of Light

For over half a century, semiconductor physics has played a vital role in almost every aspect of modern technology. Advances in this field have allowed scientists to adapt the conducting properties of material...

J. D. Joannopoulos in Handbook of Materials Modeling (2005)

Article

Reversed and Anomalous Doppler Effects in Photonic Crystals and other Time-dependent Periodic Media

We predict that reversed and anomalous non-relativistic Doppler shifts can be observed under some circumstances when light reflects from a shock wave front propagating through a photonic crystal, or material w...

Evan J. Reed, Marin Soljačić, Mihai Ibanescu… in Journal of Computer-Aided Materials Design (2005)

Article

A three-dimensional optical photonic crystal with designed point defects

Photonic crystals^1,2,3 offer unprecedented opportunities for miniaturization and integration of optical devices. They also exhibit a variety of new physical phenomena, including suppression or enhancement of spon...

Minghao Qi, Elefterios Lidorikis, Peter T. Rakich, Steven G. Johnson… in Nature (2004)

Article

Enhancement of nonlinear effects using photonic crystals

The quest for all-optical signal processing is generally deemed to be impractical because optical nonlinearities are usually weak. The emerging field of nonlinear photonic crystals seems destined to change thi...

Marin SoljaČiĆ, J. D. Joannopoulos in Nature Materials (2004)

Chapter

Novelties of Light with Photonic Crystals

Within the past several years “photonic crystals” have emerged as a new class of materials providing capabilities along new dimensions for the control and manipulation of light. These materials are viewed idea...

J. D. Joannopoulos, S. Fan, A. Mekis… in Photonic Crystals and Light Localization i… (2001)

Article

Three-dimensional control of light in a two-dimensional photonic crystal slab

Optoelectronic devices are increasingly important in communication and information technology. To achieve the necessary manipulation of light (which carries information in optoelectronic devices), considerable...

Edmond Chow, S.Y. Lin, S.G. Johnson, P.R. Villeneuve, J.D. Joannopoulos… in Nature (2000)

Article

Lasing mechanism in two-dimensional photonic crystal lasers

We conduct a comprehensive investigation of the lasing mechanism in a photonic crystal slab laser with a refractive index that is periodic in two dimensions. Experimental spectra of laser structures fabricated...

A. Mekis, M. Meier, A. Dodabalapur, R.E. Slusher, J.D. Joannopoulos in Applied Physics A (1999)

Chapter and Conference Paper

An introduction to photonic crystals

J. D. Joannopoulos in Confined Photon Systems (1999)

Article

Photonic-bandgap microcavities in optical waveguides

Confinement of light to small volumes has important implications for optical emission properties: it changes the probability of spontaneous emission from atoms, allowing both enhancement and inhibition. In pho...

J. S. Foresi, P. R. Villeneuve, J. Ferrera, E. R. Thoen, G. Steinmeyer, S. Fan… in Nature (1997)

Article

Photonic crystals: putting a new twist on light

Photonic crystals are materials patterned with a periodicity in dielectric constant, which can create a range of 'forbidden' frequencies called a photonic bandgap. Photons with energies lying in the bandgap c...

J. D. Joannopoulos, Pierre R. Villeneuve, Shanhui Fan in Nature (1997)