Photonics Spectra: quantum optics This is the syndication feed for Photonics Spectra: quantum optics. https://www.photonics.com/Splash.aspx?Tag=quantum+optics Thu, 28 Mar 2024 19:02:35 GMT Wed, 07 Feb 2024 07:00:00 GMT 1800 Optica Appoints Judith Dawes to Editorial Role: People in the News: 2/7/24
Optica has appointed Judith M. Dawes as the editor-in-chief of Optics Continuum, effective March 1. Dawes takes over for Takashige Omatsu, who led the journal as the founding editor since 2018. Dawes is a professor of physics at Macquarie University in Sydney with research interests in laser physics, nanophotonics, and laser applications in medicine and communications. She has made significant contributions to research on Yb:YAB crystals and the invention of a laser-cured protein solder for laser microsurgery. She is a fellow of SPIE, the Royal Society of New South Wales, and Optica, as well as its director-at-large. Judith M. Dawes. Courtesy of Optica.
WASHINGTON, D.C. — Sir Peter L. Knight has been named an Optica Honorary...]]>
https://www.photonics.com/Articles/Optica_Appoints_Judith_Dawes_to_Editorial_Role/p5/a69698 A69698 Wed, 07 Feb 2024 07:00:00 GMT
Self-Assembled Resonator for Optical Chips Confines Light at Atomic Scale
Optical resonators increase the strength of light-matter interaction by storing light over a long period of time. The smaller the resonator, the tighter the confinement of light will be, resulting in an even stronger interaction that can be used to produce, for example, better photodetectors or quantum light sources.

Strengthening the interaction of light with matter is a central goal of quantum optics and photonics. The development of an optical resonator that can store light for a long time in a region the size of a single atom would be a big step toward reaching this goal.
An illustration of the core of the photonic cavity that was fabricated as two halves that assembled themselves into one unit. The cavity confines light...]]>
https://www.photonics.com/Articles/Self-Assembled_Resonator_for_Optical_Chips/p5/a69535 A69535 Thu, 14 Dec 2023 07:00:00 GMT
SPIE Adds 89 Senior Members
SPIE has added 89 new senior members from academia, industry, and government, from across 17 countries. The members work in a variety of disciplines, including nanophotonics, quantum optics, biomedical engineering, free space optical communications, optical microscopy, optical systems engineering, medical imaging, lidar, machine learning, optoelectronic devices, micro-structured optical fiber technology, astronomical optics, and lithography.

SPIE senior members are society members of distinction who are recognized for their professional experience and technical accomplishments, for their active involvement with the optics community and with SPIE, and for significant performance that sets them apart from their peers. For more...]]>
https://www.photonics.com/Articles/SPIE_Adds_89_Senior_Members/p5/a69217 A69217 Fri, 04 Aug 2023 07:00:00 GMT
Linear Waveguide Streamlines Directional Single-Photon Production
Single-photon sources are fundamental components in quantum optical devices for computing, cryptography, and metrology. These devices use quantum emitters that, after excitation, produce single photons with a probability close to 100% and emission times on the order of a few to tens of nanoseconds. The quality of a single-photon source depends on its ability to extract photons efficiently, to reduce...]]>
https://www.photonics.com/Articles/Linear_Waveguide_Streamlines_Directional/p5/a69200 A69200 Mon, 31 Jul 2023 07:00:00 GMT
Xanadu Secures $100M in Series C
Xanadu’s photonics-based approach to the development of quantum computers allows it to use modern chip manufacturing facilities, the application of existing optical components used in the telecommunications industry, and fiber optics to network its photonic chips.

In June, Xanadu reported that it had achieved quantum computational advantage using its Borealis photonic quantum computer. Borealis features 216 squeezed-state qubits. In a corresponding move announced at the time, Xanadu made the computer and its capabilities available to...]]>
https://www.photonics.com/Articles/Xanadu_Secures_100M_in_Series_C/p5/a68506 A68506 Mon, 14 Nov 2022 07:00:00 GMT
TOPTICA, ams OSRAM, Fraunhofer to Develop Quantum Light Sources
Under the umbrella of the DigiQuant project funded by the Bavarian Ministry of Economic Affairs, TOPTICA, ams OSRAM, and the Fraunhofer Institute for Integrated Circuits IIS (Fraunhofer IIS) will develop diode-based laser technology to advance the field of quantum optics. The joint project supports market introduction of quantum computers.
Blue fluorescing cloud of strontium atoms within an atomic clock that have been laser-cooled to milli-Kelvin temperatures. Courtesy of Physikalisch-Technische Bundesanstalt (PTB).
Within the project, the laser diodes are to be developed at ams OSRAM. The diodes are suitable for hybrid integration of photonic waveguides and digital control electronics at TOPTICA.

Fraunhofer IIS and TOPTICA will...]]>
https://www.photonics.com/Articles/TOPTICA_ams_OSRAM_Fraunhofer_to_Develop_Quantum/p5/a68466 A68466 Tue, 01 Nov 2022 07:00:00 GMT
Investment Propels ColdQuanta Into Asia-Pacific Quantum Landscape
A 29 million AUD ($18.5 million) investment into Colorado-based quantum technology company ColdQuanta from the government of the State of Victoria, Australia, via its Breakthrough Victoria Fund, will help to establish an Asia-Pacific quantum computing and technology facility at Swinburne University of Technology. The facility will be called the ColdQuanta-Swinburne Quantum Technology Center.

The partnership will serve to connect the Victoria research community with industry and create opportunities for local job development and economic growth. In addition to the technology center, the investment will fund a quantum workforce development initiative to establish an education and training center designed to prepare the future quantum...]]>
https://www.photonics.com/Articles/Investment_Propels_ColdQuanta_Into_Asia-Pacific/p5/a68463 A68463 Mon, 31 Oct 2022 07:00:00 GMT
Materials-Based Solution Accelerates Photonic Computing
Researchers at the University of Central Florida (UCF) have introduced a previously undescribed class of topological insulators that could lead to more power efficient photonic circuits in a demonstration that is poised to advance quantum computing.

The UCF design diverges from traditional design approaches that introduce topological phases by using tailored, discrete coupling protocols or helical lattice motions. To improve the robustness of the topological features, the UCF team instead used connective chains with periodically modulated onsite potentials. It developed a phase structure to host multiple nontrivial topological phases associated with both Chern-type and anomalous chiral states. The team then laser-etched the chained,...]]>
https://www.photonics.com/Articles/Materials-Based_Solution_Accelerates_Photonic/p5/a68056 A68056 Tue, 31 May 2022 07:00:00 GMT
Integrated Photonics-Based Memristor Could Link AI, Quantum Computing
By developing a photonic quantum memristor, researchers at the University of Vienna, the National Research Council (CNR), and the Polytechnic University of Milan may have found a way to link artificial intelligence (AI) and quantum computing. The researchers engineered a device that works the same as a memristor, while encoding and transmitting quantum information and acting on quantum states.

Memristive devices are electrical components that change their resistance depending on the memory of the previous electrical current flowing through them. They are used in neuromorphic architectures such as neural networks because their behavior is similar to that of a neural synapse.
Abstract representation of a neural network that is made...]]>
https://www.photonics.com/Articles/Integrated_Photonics-Based_Memristor_Could_Link/p5/a67901 A67901 Thu, 31 Mar 2022 07:00:00 GMT
Europium Molecular Crystals Clear a Path for Quantum Storage
Europium molecular crystals, a rare-earth-based material, could provide a robust platform for photonic quantum technologies. The work of a research team from the National Centre for Scientific Research (CNRS), the University of Strasbourg, Chimie ParisTech-PSL, and the Karlsruhe Institute of Technology (KIT) demonstrated the quantum capabilities of this material, the ultranarrow optical transitions of which support optimal interaction with light.

The researchers believe that given the high number of different molecular compounds that can be synthesized, the results of the work could additionally broaden the prospects for research into molecular crystals for photonic quantum technologies.

Rare-earth ions show promise as...]]>
https://www.photonics.com/Articles/Europium_Molecular_Crystals_Clear_a_Path_for/p5/a67883 A67883 Thu, 24 Mar 2022 07:00:00 GMT
Photon-Controlled Electron Beams Push Bounds of Quantum Metrology
The combination of integrated photonics and electron microscopy supports a method for highly efficient electron-beam modulation. The experimental work described by scientists at École polytechnique fédérale de Lausanne (EPFL), the Max Planck Institute for Biophysical Chemistry (MPIBPC), and the University of Göttingen is poised to spur development of advanced quantum metrology — particularly quantum measurement schemes — using electron microscopy.

Using integrated photonics principles, the collaborators demonstrated coherent phase modulation of a continuous electron beam — an achievement that has remained out of reach for standard electron microscopes.

Ultrafast electron microscopy...]]>
https://www.photonics.com/Articles/Photon-Controlled_Electron_Beams_Push_Bounds_of/p5/a67662 A67662 Fri, 07 Jan 2022 07:00:00 GMT
Sequence of Operations Simplifies Photonic Quantum Computers
Stanford University researchers have proposed a design for photonic quantum computer that uses readily available components and a laser to manipulate a single atom that can modify the state of the photons in the system via the phenomenon of quantum teleportation.

The researchers said their photonic design is simpler than today’s quantum computers that are difficult to scale up and that require temperatures colder than interstellar space to operate. Though scientists have previously created photonic quantum computers that operate at room temperature, which makes them a promising approach to quantum computing, it is challenging to construct large numbers of logic gates for photons that connect in a reliable fashion to enable...]]>
https://www.photonics.com/Articles/Sequence_of_Operations_Simplifies_Photonic/p5/a67566 A67566 Mon, 06 Dec 2021 07:00:00 GMT
Quantum Sensors Measure Brain Activity with Pinpoint Accuracy
Quantum sensors could be used to indicate early biomarkers for brain diseases in space and time, based on the results of a University of Sussex (England) study. Researchers showed that quantum sensors, when used with magnetoencephalography (MEG), can track changes in the brain, such as a slowdown in brain activity, spatiotemporally.

In the future, the sensors could be used to scan patients periodically to check for changes in brain activity, according to the researchers.

“The sensors contain a gas of rubidium atoms, said professor Peter Kruger, who leads the Quantum Systems and Devices lab at the University of Sussex. “Beams of laser light are shone at the atoms, and when the atoms experience changes in a magnetic...]]>
https://www.photonics.com/Articles/Quantum_Sensors_Measure_Brain_Activity_with/p5/a67557 A67557 Thu, 02 Dec 2021 07:00:00 GMT
Interferometry reveals 'social behavior' of Photons
The photon is one of the particle types, called bosons, that is able to form a Bose-Einstein condensate. The ability of photons to condense in the state known as a Bose-Einstein condensate is how liquid light is derived.

To understand the physical mechanisms that control the formation of a Bose-Einstein condensate composed of light, scientists at the University of Twente (UT) investigated the Bose-Einstein condensation of photons in a controlled environment, using a Mach-Zehnder (MZ) interferometer.

The scientists specifically studied the switching behavior of the interferometer and collected the resulting measurements. By partially or completely closing the outputs of the interferometer, the scientists systematically varied...]]>
https://www.photonics.com/Articles/Interferometry_reveals_social_behavior_of/p5/a67472 A67472 Thu, 28 Oct 2021 07:00:00 GMT
Continuous-Wave OPA Supports Noise-Reduced Chip-Scale Optical Signal Processing
An optical amplifier developed at Chalmers University of Technology is poised to radically improve optical communications performance. The compact amplifier is designed to fit on a chip and amplify light without generating excess noise.

Light-based communications make it possible to send information around the world and into space. However, when it travels long distances, the light loses power. Without amplifiers, up to 99% of the signal in an optical fiber cable would disappear within 100 km.

As a result, multiple amplifiers are needed to support optical transmission, and each added amplifier increases the noise level. This diminishes signal quality.

The compact optical amplifier developed at Chalmers is thousands of...]]>
https://www.photonics.com/Articles/Continuous-Wave_OPA_Supports_Noise-Reduced/p5/a67415 A67415 Fri, 08 Oct 2021 07:00:00 GMT
Quantum Computer Platform Uses Optical Fiber to Perform at Room Temperature
A team at the Technical University of Denmark (DTU) has developed what it calls a “complete platform” for an optical quantum computer. The platform is universal and scalable, the team said, and takes place at room temperature. The technology is compatible with standard fiber optic networks.

The demonstration of a so-called universal gate set — and the implementation of several operations by means thereof — is what the team said constitutes an optical quantum computing advancement. Gates serve to perform operations on one or more qubits, and to implement an algorithm given that qubits are carriers of information.

“Our demonstration of a universal set of gates is absolutely crucial. It means that any...]]>
https://www.photonics.com/Articles/Quantum_Computer_Platform_Uses_Optical_Fiber_to/p5/a67265 A67265 Wed, 18 Aug 2021 07:00:00 GMT
Researchers Develop Octave-Spanning Combs in Aluminum Nitride Resonator
In the time domain, an optical frequency comb consists of a series of ultrashort pulses with equal separation in time. In the frequency domain, it is a spectrum that consists of a series of discrete, equally spaced frequency lines (that is, colors). Much...]]>
https://www.photonics.com/Articles/Researchers_Develop_Octave-Spanning_Combs_in/p5/a67212 A67212 Fri, 30 Jul 2021 07:00:00 GMT
Cold-Atom Source Brings Portable Quantum Devices Closer to Reality
A high-flux and compact cold-atom source with low power consumption developed by an Oxford University-led research group is poised to enable devices such as space-based atomic clocks, improving quantum applications for communication and navigation. The research is a step toward portable quantum devices.

“Compact atomic clocks that can be deployed more widely, including in space, provide resilience in communications networks because local clocks can maintain accurate timekeeping even if there is a network disruption,” said research team leader Christopher Foot of Oxford University. Quantum technologies based on laser-cooled atoms are already used for timekeeping on a national level, Foot said.

The researchers’...]]>
https://www.photonics.com/Articles/Cold-Atom_Source_Brings_Portable_Quantum_Devices/p5/a67101 A67101 Tue, 22 Jun 2021 07:00:00 GMT
Light-Matter Coupling Offers Implications for Quantum Optics
An international research team led by the University of Minnesota Twin Cities has produced a quantum state that is part light and part matter. The research has implications for the next generation of quantum-based optical and electronic devices, and may also contribute to increasing the efficiency of nanoscale chemical reactions.

The researchers achieved ultrastrong coupling between infrared light and matter by trapping light in tiny annular holes in a thin layer of gold. The holes were as small as 2 nm, or 25,000× smaller than the width of a human hair.
Annular holes in a thin gold film filled with silicon dioxide enable ultrastrong coupling between light and atomic vibrations. This structure provides opportunities to probe...]]>
https://www.photonics.com/Articles/Light-Matter_Coupling_Offers_Implications_for/p5/a66481 A66481 Wed, 09 Dec 2020 07:00:00 GMT
INRS Researchers Awarded Brockhouse Canada Prize
Azaña, a specialist in optical fiber telecommunications and ultrafast photonics, holds the Canada Research Chair in Ultrafast Photonic Signal Processing. Morandotti, specializing in nonlinear optics and micro- and nanofabrication of photonic structures, holds the Canada Research Chair in Intelligent Photonics.

The award is given by the Natural Sciences and Engineering Research Council of Canada and recognizes Canadian research teams from...]]>
https://www.photonics.com/Articles/INRS_Researchers_Awarded_Brockhouse_Canada_Prize/p5/a66392 A66392 Fri, 13 Nov 2020 07:00:00 GMT