News & Views |
Featured
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Article |
Ultrasensitive plano-concave optical microresonators for ultrasound sensing
An optical-based scheme for ultrasound sensing provides very high sensitivity with excellent broadband acoustic frequency response and wide directivity.
- James A. Guggenheim
- , Jing Li
- & Paul C. Beard
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Article |
Deep in vivo photoacoustic imaging of mammalian tissues using a tyrosinase-based genetic reporter
Deep photoacoustic imaging of mammalian cells featuring genetically encoded contrast is reported.
- Amit P. Jathoul
- , Jan Laufer
- & Paul Beard
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Article |
Efficient real-time detection of terahertz pulse radiation based on photoacoustic conversion by carbon nanotube nanocomposite
By integrating a photoacoustic transmitter based on a carbon nanotube nanocomposite and an optical microring resonator as an ultrasonic sensor, a low-noise terahertz pulse detection system is demonstrated at room temperature. The response time and the noise-equivalent detectability energy are on the order of 0.1 µs and 220 pJ, respectively.
- Sung-Liang Chen
- , You-Chia Chang
- & L. Jay Guo
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News & Views |
Merging the best of two worlds
The combination of ultrasound and optics, together with statistics, now permits light focusing and imaging deep inside strongly scattering media at the optical diffraction limit.
- Geoffroy Lerosey
- & Mathias Fink
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Review Article |
Ultrafast acousto-magneto-plasmonics
Surface plasmon polaritons have become popular because of their sub-wavelength confinement and the possibility to perform ultrasensitive optical measurements. This article reviews the development of active plasmonic devices and new metrologies using hybrid multilayer structures combining with the magnetic, acoustic and ultrafast effects.
- Vasily V. Temnov
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Letter |
Dynamic modulation of photonic crystal nanocavities using gigahertz acoustic phonons
The authors demonstrate dynamic tuning of a photonic-crystal cavity by surface acoustic waves at frequencies exceeding 1.7 GHz. The tuning is claimed to preserve the quality factor and to be an order of magnitude faster than alternative approaches.
- Daniel A. Fuhrmann
- , Susanna M. Thon
- & Hubert J. Krenner
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News & Views |
A non-magnetic approach
Going beyond the conventional approach based on the Faraday effect, scientists have now used acoustic modes optically excited in the core of a photonic crystal fibre to realize a reconfigurable all-optical isolator.
- Zongfu Yu
- & Shanhui Fan
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Article |
Reconfigurable light-driven opto-acoustic isolators in photonic crystal fibre
Scientists experimentally demonstrate a reconfigurable all-optical isolator based on the optical excitation of a gigahertz guided acoustic mode in a micrometre-sized photonic crystal fibre core. The work is expected to benefit advanced optical communications and all-optical signal-processing systems.
- M. S. Kang
- , A. Butsch
- & P. St. J. Russell
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Product Focus |
Acousto-optic devices
Using high-frequency sound waves to make tunable optical filters, modulators and Q-switches is a well-established and convenient technological solution for many applications, reports Neil Savage.
- Neil Savage
Quantum phase modulator
Nanotube shock
Fibre-optic pickup