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Nature Photonics

Ghaith Makey, Özgün Yavuz, Denizhan K Kesim, Ahmet Turnalı, Parviz Elahi, Serim Ilday, Onur Tokel, F Ömer Ilday
Holography is the most promising route to true-to-life 3D projections, but the incorporation of complex images with full depth control remains elusive. Digitally synthesised holograms1-7, which do not require real objects to create a hologram, offer the possibility of dynamic projection of 3D video8,9. Extensive efforts aimed 3D holographic projection10-17, however available methods remain limited to creating images on a few planes10-12, over a narrow depth-of-field13,14 or with low resolution15-17. Truly 3D holography also requires full depth control and dynamic projection capabilities, which are hampered by high crosstalk9,18...
April 2019: Nature Photonics
Alberto Ciarrocchi, Dmitrii Unuchek, Ahmet Avsar, Kenji Watanabe, Takashi Taniguchi, Andras Kis
Long-lived interlayer excitons in van der Waals heterostructures based on transition metal dichalcogenides, together with unique spin-valley physics, make them promising for next-generation photonic and valleytronic devices. While the emission characteristics of interlayer excitons have been studied, efficient manipulation of their valley-state, a necessary requirement for information encoding, is still lacking. Here, we demonstrate comprehensive electrical control of interlayer excitons in a MoSe2 /WSe2 heterostructure...
February 2019: Nature Photonics
Myoung-Gyun Suh, Xu Yi, Yu-Hung Lai, S Leifer, Ivan S Grudinin, G Vasisht, Emily C Martin, Michael P Fitzgerald, G Doppmann, J Wang, D Mawet, Scott B Papp, Scott A Diddams, C Beichman, Kerry Vahala
Orbiting planets induce a weak radial velocity (RV) shift in the host star that provides a powerful method of planet detection. Importantly, the RV technique provides information about the exoplanet mass, which is unavailable with the complementary technique of transit photometry. However, RV detection of an Earth-like planet in the 'habitable zone'1 requires extreme spectroscopic precision that is only possible using a laser frequency comb (LFC)2 . Conventional LFCs require complex filtering steps to be compatible with astronomical spectrographs, but a new chip-based microresonator device, the Kerr soliton microcomb3-8 , is an ideal match for astronomical spectrograph resolution and can eliminate these filtering steps...
2019: Nature Photonics
Y Salamin, B Baeuerle, W Heni, F C Abrecht, A Josten, Y Fedoryshyn, C Haffner, R Bonjour, T Watanabe, M Burla, D L Elder, L R Dalton, J Leuthold
To cope with the high bandwidth requirements of wireless applications1, carrier frequencies are shifting towards the millimetre-wave and terahertz bands2-5. Conversely, data is normally transported to remote wireless antennas by optical fibres. Therefore, full transparency and flexibility to switch between optical and wireless domains would be desirable6,7. Here, we demonstrate for the first time a direct wireless-to-optical receiver in a transparent optical link. We successfully transmit 20 and 10 Gbit/s over wireless distances of 1 and 5 m at a carrier frequency of 60 GHz, respectively...
December 2018: Nature Photonics
Hamid Pahlevaninezhad, Mohammadreza Khorasaninejad, Yao-Wei Huang, Zhujun Shi, Lida P Hariri, David C Adams, Vivien Ding, Alexander Zhu, Cheng-Wei Qiu, Federico Capasso, Melissa J Suter
Acquisition of high-resolution images from within internal organs using endoscopic optical imaging has numerous clinical applications. However, difficulties associated with optical aberrations and the trade-off between transverse resolution and depth-of-focus significantly limit the scope of applications. Here, we integrate a metalens, with the ability to modify the phase of incident light at sub-wavelength level, into the design of an endoscopic optical coherence tomography catheter (termed nano-optic endoscope) to achieve near diffraction-limited imaging through negating non-chromatic aberrations...
September 2018: Nature Photonics
André Espinha, Camilla Dore, Cristiano Matricardi, Maria Isabel Alonso, Alejandro R Goñi, Agustín Mihi
As contamination and environmental degradation increase nowadays, there is a huge demand for new eco-friendly materials. Despite its use for thousands of years, cellulose and its derivatives have gained renewed interest as favourable alternatives to conventional plastics, due to their abundance and lower environmental impact. We report the fabrication of photonic and plasmonic structures by moulding hydroxypropyl cellulose into sub-micrometric periodic lattices, using soft lithography. This is an alternative way to achieve structural colour in this material which is usually obtained exploiting its chiral nematic phase...
June 2018: Nature Photonics
Dongfang Zhang, Arya Fallahi, Michael Hemmer, Xiaojun Wu, Moein Fakhari, Yi Hua, Huseyin Cankaya, Anne-Laure Calendron, Luis E Zapata, Nicholas H Matlis, Franz X Kärtner
Acceleration and manipulation of electron bunches underlie most electron and X-ray devices used for ultrafast imaging and spectroscopy. New terahertz-driven concepts offer orders-of-magnitude improvements in field strengths, field gradients, laser synchronization and compactness relative to conventional radio-frequency devices, enabling shorter electron bunches and higher resolution with less infrastructure while maintaining high charge capacities (pC), repetition rates (kHz) and stability. We present a segmented terahertz electron accelerator and manipulator (STEAM) capable of performing multiple high-field operations on the 6D-phase-space of ultrashort electron bunches...
June 2018: Nature Photonics
Linhan Lin, Mingsong Wang, Xiaolei Peng, Emanuel N Lissek, Zhangming Mao, Leonardo Scarabelli, Emily Adkins, Sahin Coskun, Husnu Emrah Unalan, Brian A Korgel, Luis M Liz-Marzán, Ernst-Ludwig Florin, Yuebing Zheng
Optical manipulation of plasmonic nanoparticles provides opportunities for fundamental and technical innovation in nanophotonics. Optical heating arising from the photon-to-phonon conversion is considered as an intrinsic loss in metal nanoparticles, which limits their applications. We show here that this drawback can be turned into an advantage, by developing an extremely low-power optical tweezing technique, termed opto-thermoelectric nanotweezers (OTENT). Through optically heating a thermoplasmonic substrate, alight-directed thermoelectric field can be generated due to spatial separation of dissolved ions within the heating laser spot, which allows us to manipulate metal nanoparticles of a wide range of materials, sizes and shapes with single-particle resolution...
April 2018: Nature Photonics
Tomoya Higo, Huiyuan Man, Daniel B Gopman, Liang Wu, Takashi Koretsune, Olaf M J van 't Erve, Yury P Kabanov, Dylan Rees, Yufan Li, Michi-To Suzuki, Shreyas Patankar, Muhammad Ikhlas, C L Chien, Ryotaro Arita, Robert D Shull, Joseph Orenstein, Satoru Nakatsuji
When a polarized light beam is incident upon the surface of a magnetic material, the reflected light undergoes a polarization rotation1 . This magneto-optical Kerr effect (MOKE) has been intensively studied in a variety of ferro- and ferrimagnetic materials because it provides a powerful probe for electronic and magnetic properties2, 3 as well as for various applications including magneto-optical recording4 . Recently, there has been a surge of interest in antiferromagnets (AFMs) as prospective spintronic materials for high-density and ultrafast memory devices, owing to their vanishingly small stray field and orders of magnitude faster spin dynamics compared to their ferromagnetic counterparts5-9 ...
February 2018: Nature Photonics
Meena Siddiqui, Ahhyun S Nam, Serhat Tozburun, Norman Lippok, Cedric Blatter, Benjamin J Vakoc
Existing three-dimensional optical imaging methods excel in controlled environments but are difficult to deploy over large, irregular and dynamic fields. This has limited imaging in areas such as material inspection and medicine. To better address these applications, we developed methods in optical coherence tomography (OCT) to efficiently interrogate sparse scattering fields, i.e., those in which most locations (voxels) do not generate meaningful signal. Frequency comb sources are used to superimpose reflected signals from equispaced locations through optical subsampling...
2018: Nature Photonics
Mooseok Jang, Yu Horie, Atsushi Shibukawa, Joshua Brake, Yan Liu, Seyedeh Mahsa Kamali, Amir Arbabi, Haowen Ruan, Andrei Faraon, Changhuei Yang
Recently, wavefront shaping with disordered media has demonstrated optical manipulation capabilities beyond those of conventional optics, including extended volume, aberration-free focusing and subwavelength focusing. However, translating these capabilities to useful applications has remained challenging as the input-output characteristics of the disordered media ( P variables) need to be exhaustively determined via O ( P ) measurements. Here, we propose a paradigm shift where the disorder is specifically designed so its exact input-output characteristics are known a priori and can be used with only a few alignment steps...
2018: Nature Photonics
Kateryna Trofymchuk, Andreas Reisch, Pascal Didier, François Fras, Pierre Gilliot, Yves Mely, Andrey S Klymchenko
Here, we explore the enhancement of single molecule emission by polymeric nano-antenna that can harvest energy from thousands of donor dyes to a single acceptor. In this nano-antenna, the cationic dyes are brought together in very close proximity using bulky counterions, thus enabling ultrafast diffusion of excitation energy (≤30 fs) with minimal losses. Our 60-nm nanoparticles containing >10,000 rhodamine-based donor dyes can efficiently transfer energy to 1-2 acceptors resulting in an antenna effect of ~1,000...
October 2017: Nature Photonics
Onur Tokel, Ahmet Turnali, Ghaith Makey, Parviz Elahi, Tahir Çolakoğlu, Emre Ergeçen, Özgün Yavuz, René Hübner, Mona Zolfaghari Borra, Ihor Pavlov, Alpan Bek, Raşit Turan, Denizhan Koray Kesim, Serhat Tozburun, Serim Ilday, F Ömer Ilday
Silicon is an excellent material for microelectronics and integrated photonics1-3 with untapped potential for mid-IR optics4. Despite broad recognition of the importance of the third dimension5,6, current lithography methods do not allow fabrication of photonic devices and functional microelements directly inside silicon chips. Even relatively simple curved geometries cannot be realised with techniques like reactive ion etching. Embedded optical elements, like in glass7, electronic devices, and better electronic-photonic integration are lacking8...
October 2017: Nature Photonics
F Langer, M Hohenleutner, U Huttner, S W Koch, M Kira, R Huber
High-harmonic (HH) generation in crystalline solids1-6 marks an exciting development, with potential applications in high-efficiency attosecond sources7, all-optical bandstructure reconstruction8,9, and quasiparticle collisions10,11. Although the spectral1-4 and temporal shape5 of the HH intensity has been described microscopically1-6,12, the properties of the underlying HH carrier wave have remained elusive. Here we analyse the train of HH waveforms generated in a crystalline solid by consecutive half cycles of the same driving pulse...
April 2017: Nature Photonics
M Gilles, P-Y Bony, J Garnier, A Picozzi, M Guasoni, J Fatome
Domain walls are topological defects which occur at symmetry-breaking phase transitions. While domain walls have been intensively studied in ferromagnetic materials, where they nucleate at the boundary of neighbouring regions of oppositely aligned magnetic dipoles, their equivalent in optics have not been fully explored so far. Here, we experimentally demonstrate the existence of a universal class of polarization domain walls in the form of localized polarization knots in conventional optical fibres. We exploit their binding properties for optical data transmission beyond the Kerr limits of normally dispersive fibres...
February 2017: Nature Photonics
Qian Huang, Joon Lee, Fernando Teran Arce, Ilsun Yoon, Pavimol Angsantikul, Justin Liu, Yuesong Shi, Josh Villanueva, Soracha Thamphiwatana, Xuanyi Ma, Liangfang Zhang, Shaochen Chen, Ratnesh Lal, Donald J Sirbuly
Ultrasensitive nanomechanical instruments, including the atomic force microscope (AFM)1-4 and optical and magnetic tweezers5-8 , have helped shed new light on the complex mechanical environments of biological processes. However, it is difficult to scale down the size of these instruments due to their feedback mechanisms9 , which, if overcome, would enable high-density nanomechanical probing inside materials. A variety of molecular force probes including mechanophores10 , quantum dots11 , fluorescent pairs12,13 and molecular rotors14-16 have been designed to measure intracellular stresses; however, fluorescence-based techniques can have short operating times due to photo-instability and it is still challenging to quantify the forces with high spatial and mechanical resolution...
2017: Nature Photonics
Qi Pian, Ruoyang Yao, Nattawut Sinsuebphon, Xavier Intes
Spectrally resolved fluorescence lifetime imaging1-3 and spatial multiplexing1,4,5 have offered information content and collection-efficiency boosts in microscopy, but efficient implementations for macroscopic applications are still lacking. An imaging platform based on time-resolved structured light and hyperspectral single-pixel detection has been developed to perform quantitative macroscopic fluorescence lifetime imaging (MFLI) over a large field of view (FOV) and multiple spectral bands simultaneously. The system makes use of three digital micromirror device (DMD)-based spatial light modulators (SLMs) to generate spatial optical bases and reconstruct N by N images over 16 spectral channels with a time-resolved capability (~40 ps temporal resolution) using fewer than N 2 optical measurements...
2017: Nature Photonics
Norman Lippok, Martin Villiger, Alexandre Albanese, Eelco F J Meijer, Kwanghun Chung, Timothy P Padera, Sangeeta N Bhatia, Brett E Bouma
Owing to their electromagnetic properties, tunability and biocompatibility, gold nanorods (GNRs) are being investigated as multifunctional probes for a range of biomedical applications. However, detection beyond the reach of traditional fluorescence and two-photon approaches and quantitation of their concentration in biological tissue remain challenging tasks in microscopy. Here we show how the size and aspect ratio that impart GNRs with their plasmonic properties also make them a source of entropy. We report on how depolarization can be exploited as a strategy to visualize GNR diffusion and distribution in biologically relevant scenarios ex vivo , in vitro and in vivo ...
2017: Nature Photonics
Nisan Siegel, Vladimir Lupashin, Brian Storrie, Gary Brooker
Fresnel incoherent correlation holography (FINCH) microscopy is a promising approach for high-resolution biological imaging but has so far been limited to use with low-magnification, low-numerical-aperture configurations. We report the use of in-line incoherent interferometers made from uniaxial birefringent α-barium borate (α-BBO) or calcite crystals that overcome the aberrations and distortions present with previous implementations that employed spatial light modulators or gradient refractive index lenses...
December 2016: Nature Photonics
Kyle M Douglass, Christian Sieben, Anna Archetti, Ambroise Lambert, Suliana Manley
No abstract text is available yet for this article.
November 2016: Nature Photonics
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