Volume 5 Issue 12, December 2011

Editorial

The importance of accessibility

The ability to communicate research results to a non-specialist audience in a clear and concise manner is a skill that should not be overlooked.

Focus:

Microwave photonics
Editorial 30 Nov 2011
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Research Highlights

Repolarization

David Pile

Focus:

Microwave photonics
Research Highlights 30 Nov 2011
Rephasing stored light

David Pile

Focus:

Microwave photonics
Research Highlights 30 Nov 2011
Blue–violet reflectors

Rachel Won

Focus:

Microwave photonics
Research Highlights 30 Nov 2011
Benefit of strain

Oliver Graydon

Focus:

Microwave photonics
Research Highlights 30 Nov 2011
Nanowire emitters

Noriaki Horiuchi

Focus:

Microwave photonics
Research Highlights 30 Nov 2011
Liquid flexibility

James Baxter
Research Highlights 30 Nov 2011
Light-driven colour change

James Baxter
Research Highlights 30 Nov 2011
Ultimate cooling

Oliver Graydon

Focus:

Microwave photonics
Research Highlights 30 Nov 2011
Green power boost

Oliver Graydon

Focus:

Microwave photonics
Research Highlights 30 Nov 2011

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News & Views

Solid-state lighting on glass

The ability to fabricate an array of GaN light emitters on an amorphous glass substrate could lead to significant improvements in the scalability and cost of blue and white LED technology.

Nicolas Grandjean
Raphaël Butté

Collections:

Microwave photonics

Physics Nobel Celebration - Blue Light Emiting diodes
News & Views 30 Nov 2011
The Airy beam laser

Rachel Won

Focus:

Microwave photonics
News & Views 30 Nov 2011
Shaping single-crystal silicon

David Pile

Focus:

Microwave photonics
News & Views 30 Nov 2011
Efficient and flexible solution

Researchers have developed flexible thin-film OLEDs that exhibit high efficiencies at green wavelengths without the use of a high-refractive-index substrate.

Karl Leo

Focus:

Microwave photonics
News & Views 30 Nov 2011
Hope from hybrids

The ease at which group III–V semiconductors can now be integrated with silicon suggests that the need for a pure silicon laser is rapidly fading.

Oliver Graydon

Focus:

Microwave photonics
News & Views 30 Nov 2011

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Editorial

Long live radio

Focus:

Microwave photonics
Editorial 01 Dec 2011

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Business News

Wireless future drives microwave photonics

Focus:

Microwave photonics
Business News 01 Dec 2011

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Research Highlights

Comb-based pulse shaping

James Baxter

Focus:

Microwave photonics
Research Highlights 01 Dec 2011
Scaling down frequency

David Pile

Focus:

Microwave photonics
Research Highlights 01 Dec 2011
Waveform mathematics

Oliver Graydon

Focus:

Microwave photonics
Research Highlights 01 Dec 2011
Ultralow phase noise

Noriaki Horiuchi

Focus:

Microwave photonics
Research Highlights 01 Dec 2011
On-chip signal processing

Rachel Won

Focus:

Microwave photonics
Research Highlights 01 Dec 2011

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Profile

Covering all bases

The popularity and demand for data-rich wireless communication is driving the deployment of radio-over-fibre technology and the success of the firms such as Zinwave, reports Nadya Anscombe.

Nadya Anscombe

Focus:

Microwave photonics
Profile 01 Dec 2011

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Industry Perspective

The optoelectronic oscillator

Photonic technology can now be used to construct miniature sources of high-frequency radio waves that have exceptional spectral purity.

Lute Maleki

Focus:

Microwave photonics
Industry Perspective 01 Dec 2011
Harnessing slow light

Slow-light techniques originally conceived for buffering high-speed digital optical signals now look set to play an important role in providing broadband phase and true time delays for microwave signals.

José Capmany
Ivana Gasulla
Salvador Sales

Focus:

Microwave photonics
Industry Perspective 30 Nov 2011

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Product Highlights

Compact devices, optical phase-locked loops and more

Focus:

Microwave photonics
Product Highlights 01 Dec 2011

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Interview

Microwave photonics shines

The combination of microwave photonics and optics has advanced many applications in defence, wireless communications, imaging and network infrastructure. Rachel Won talks to Jianping Yao from the University of Ottawa in Canada about the importance of this growing field.

Rachel Won

Focus:

Microwave photonics
Interview 01 Dec 2011

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Letter

Enhanced single-photon emission from a diamond–silver aperture

Directly embedding single nitrogen–vacancy centres into ordered arrays of plasmonic nanostructures can enhance their radiative emission rate and thus give greater scalability over previous bottom-up approaches for the realization of on-chip quantum networks.

Jennifer T. Choy
Birgit J. M. Hausmann
Marko Lončar

Focus:

Microwave photonics
Letter 09 Oct 2011
Molecular imaging true-colour spectroscopic optical coherence tomography

Using a new form of spectroscopic optical coherence tomography, researchers demonstrate three-dimensional molecular imaging of both endogenous and exogenous chromophores with high spectral fidelity. This scheme has significant implications for a range of biomedical applications, including ophthalmology, early cancer detection and understanding fundamental disease mechanisms such as hypoxia and angiogenesis.

Francisco E. Robles
Christy Wilson
Adam Wax

Collections:

Department of Biomedical Engineering at Duke University

Microwave photonics
Letter 23 Oct 2011
Multilevel quantization of optical phase in a novel coherent parametric mixer architecture

Researchers report an all-optical signal processing architecture that enables the multilevel all-optical quantization of phase-encoded optical signals. Using four-wave-mixing and two-pump parametric processes, they experimentally demonstrate up to six levels of quantization.

Joseph Kakande
Radan Slavík
David J. Richardson

Focus:

Microwave photonics
Letter 09 Oct 2011
Unlocking the full potential of organic light-emitting diodes on flexible plastic

Using a thin-film outcoupling enhancement method consisting of a weak optical cavity on a flexible substrate with a non-indium-tin-oxide anode, researchers demonstrate phosphorescent organic LEDs with an external quantum efficiency of up to 63% at green wavelengths, which remains as high as 60% at luminous intensities of >10,000 cd m⁻².

Z. B. Wang
M. G. Helander
Z. H. Lu

Focus:

Microwave photonics
Letter 30 Oct 2011
On-chip optical isolation in monolithically integrated non-reciprocal optical resonators

Scientists report the fabrication of a nonreciprocal optical resonator with a small length footprint of 290 µm on a silicon-on-insulator substrate. The device achieves unidirectional optical transmission with an isolation ratio of up to 19.5 dB near the telecommunications wavelength of 1,550 nm in a homogeneous external magnetic field.

Lei Bi
Juejun Hu
C. A. Ross

Focus:

Microwave photonics
Letter 13 Nov 2011

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Article

Nearly single-crystalline GaN light-emitting diodes on amorphous glass substrates

Researchers use a pre-orienting layer to achieve nearly single-crystalline GaN pyramidal arrays on amorphous glass substrates. The polycrystalline morphology can be controlled by placing a hole-patterned SiO₂ layer on the low-temperature GaN nucleation layer. Light-emitting diodes fabricated by this technique exhibited a luminance of 600 cd m⁻².

Jun Hee Choi
Andrei Zoulkarneev
Kinam Kim

Collections:

Microwave photonics

Physics Nobel Celebration - Blue Light Emiting diodes
Article 09 Oct 2011
Spectral line-by-line pulse shaping of on-chip microresonator frequency combs

Researcher demonstrate the line-by-line pulse shaping of frequency combs generated in silicon nitride ring resonators, and observe two distinct paths to comb formation that exhibit strikingly different time domain behaviours.

Fahmida Ferdous
Houxun Miao
Andrew M. Weiner

Focus:

Microwave photonics
Article 09 Oct 2011

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Interview

GaN-on-glass success

The successful growth of GaN-based LEDs on amorphous glass avoids the size and cost limitations of a sapphire substrate, says Jun Hee Choi from the Samsung Advanced Institute of Technology in South Korea.

Noriaki Horiuchi

Focus:

Microwave photonics
Interview 30 Nov 2011

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Focus

Microwave photonics

The fortuitous combination of maturing capabilities, falling component prices and rising demand bodes well for the future of microwave photonics and radio-over- fibre technologies, according to opinions gathered in this month's Technology Focus on the topic.

Focus 30 Nov 2011

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Volume 5 Issue 12, December 2011

Editorial

Research Highlights

News & Views

Editorial

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