#1Léopold Virot(UGA: University of Grenoble)H-Index: 11
The demonstration of a germanium-based photodiode with a 3 dB bandwidth of 265 GHz and compatibility with silicon photonics and CMOS fabrication offers a cost-effective route to faster channel data rates for optical communications.
#1Seiichiro Izawa(Graduate University for Advanced Studies)H-Index: 14
#2Masahiro Hiramoto(Graduate University for Advanced Studies)H-Index: 30
The energy of photons, that is, the wavelength of light, can be upgraded through interactions with materials in a process called photon upconversion1. Although upconversion in organic solids is important for various applications, such as photovoltaics and bioimaging, conventional upconversion systems, based on intersystem crossing (ISC), suffer from low efficiency2–6. Here we report a novel upconversion system with heterojunctions of organic semiconductors. The upconversion occurs through charge...
Last. Lars Zimmermann(Technical University of Berlin)H-Index: 26
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On a scalable silicon technology platform, we demonstrate photodetectors matching or even surpassing state-of-the-art III–V devices. As key components in high-speed optoelectronics, photodetectors with bandwidths greater than 100 GHz have been a topic of intense research for several decades. Solely InP-based detectors could satisfy the highest performance specifications. Devices based on other materials, such as germanium-on-silicon devices, used to lag behind in speed, but enabled complex photo...
#1Sakellaris Mailis(Skolkovo Institute of Science and Technology)H-Index: 25
Practical on-chip optical isolators providing non-reciprocal propagation are still a challenge. Now, two independent groups show that a phonon-mediated break of the chiral symmetry in waveguide resonators may offer a solution.
Last. Kevin K. Tsia(HKU: University of Hong Kong)H-Index: 29
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After over 30 years of advances, multiphoton microscopy (MPM) is now instrumental in a wide range of in vivo biological imaging applications. However, it has, until recently, remained not achievable or affordable to meet the unmet need for fast monitoring of biological dynamics and large-scale examination of biological heterogeneity. Only within the past few years have new strategies emerged to empower MPM at a speed that was once inconceivable, notably at kilohertz two-dimensional (2D) frame ra...
Optical isolators today are exclusively built on magneto-optic principles but are not readily implemented within photonic integrated circuits. So far, no magnetless alternative1–22 has managed to simultaneously combine linearity (that is, no frequency shift), linear response (that is, input–output scaling), ultralow insertion loss and large directional contrast on-chip. Here we demonstrate an electrically driven optical isolator design that leverages the unbeatable transparency of a short, high-...
#3Jialun Tang(BIT: Beijing Institute of Technology)H-Index: 7
#5Yongtian Wang(BIT: Beijing Institute of Technology)H-Index: 25
Waveplates are widely used in photonics to control the polarization of light1,2. Often, they are fabricated from birefringent crystals that have different refractive indices along and normal to the crystal axis. Similar optical components are found in the natural world, including the eyes of mantis shrimp3,4 and the iridescence of giant clams5, fish6 and plants7. Optical retardation in biology relies on sophisticated self-assembly, whereas man-made systems comprise multiple-layered materials8–11...
Photonic integrated circuits hold great promise in enabling the practical wide-scale deployment of quantum communications; however, despite impressive experiments of component functionality, a fully operational quantum communication system using photonic chips is yet to be demonstrated. Here we demonstrate an entirely standalone secure communication system based on photonic integrated circuits—assembled into compact modules—for quantum random number generation and quantum key distribution at gig...
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