摘要：“近年来，光子学领域有越来越多的突破性成果，但是高影响力的期刊还是太少。”主编Anatoly Zayats教授表示，“Advanced Photoni……查看详细>>
Advanced Photonics 开放投稿啦！
摘要：中科院上海光机所杂志社与国际光学工程学会（SPIE）联合发布Advanced Photonics (AP)新刊封面。……查看详细>>
摘要：杂志社和国际光学工程学会（SPIE）联合创办新刊：Advanced Photonics ……查看详细>>
Vera N. Smolyaninova
Mary S. Devadas
Igor I. Smolyaninov
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Recently, it was predicted that extraordinary light waves in hyperbolic metamaterials may exhibit two-time physics behavior. We report experimental observation of this effect via investigation of gravity-like nonlinear optics of iron/cobalt-based ferrofluid hyperbolic metamaterials. In addition to conventional temporal coordinates, the spatial coordinate oriented along the optical axis of the metamaterial also exhibits timelike character, which leads to very unusual two-time physics behavior in these systems on small scales.
PDF全文   HTML全文 Advanced Photonics, 2020年第2卷第5期 pp.056001-56001
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Microbubbles acting as lenses are interesting for optical and photonic applications such as volumetric displays, optical resonators, integration of photonic components onto chips, high resolution spectroscopy, lithography and imaging. However, stable, rationally designed, and uniform microbubbles on substrates such as silicon chips are challenging because of the random nature of microbubble formation. Here, we describe the fabrication of elastic microbubbles with precise control of volume and curvature based on femtosecond laser irradiated graphene oxide. We demonstrate that the graphene microbubbles possess near perfect curvature that allows them to function as reflective microlenses for focusing broadband white light into an ultrahigh aspect ratio diffraction-limited photonic jet without chromatic aberration. Our results provide a pathway for integration of graphene microbubbles as lenses for nanophotonic components for miniaturized lab-on-a-chip devices along with applications in high resolution spectroscopy and imaging.
PDF全文 (下载：1) Advanced Photonics ，年第卷第期 pp.
Metasurface analogue of the phenomenon of electromagnetically induced transparency (EIT) that is originally observed in atomic gases, offers diverse applications for new photonic components such as nonlinear optical units, slow light devices, and biosensors. Development of functional integrated photonic devices requires an active control of EIT in metasurfaces. Here, we demonstrate a reversible switching of the metasurface-induced transparency in the near infrared (NIR) region, by incorporating a non-volatile phase change material, Ge2Sb2Te5, into the metasurface design. This leads to an ultrafast reconfigurable transparency window under an excitation of nanosecond pulsed laser. The measurement agrees well with both theoretical calculation and finite-difference time-domain numerical simulation. Our work paves the avenue for dynamic metasurface devices such as reconfigurable slow light and biosensing.
PDF全文 (下载：0) Advanced Photonics ，年第卷第期 pp.
Interaction of electromagnetic, acoustic and even gravitational waves with accelerating bodies forms a class of nonstationary time-variant processes. Scattered waves contain intrinsic signatures of motion, which manifest in a broad range of phenomena, including Sagnac interference, Doppler and micro-Doppler frequency shifts. While general relativity is often required to account for motion, instantaneous rest frame approaches are frequently used to describe interactions with slowly accelerating objects. Here we investigate theoretically and experimentally an interaction regime, which is neither relativistic nor adiabatic. The test model considers an accelerating scatterer with a long-lasting relaxation memory. The slow decay rates violate the instantaneous reaction assumption of quasi-stationarity, introducing non-Markovian contributions to the scattering process. Memory signatures in scattering from a rotating dipole are studied theoretically, showing symmetry breaking of micro-Doppler combs. A quasi-stationary numeric analysis of scattering in the short memory limit is proposed and validated experimentally with an example of electromagnetic pulses interacting with a rotating wire.
Semiconductor perovskite films are now being widely investigated as light harvesters in solar cells with ever-increasing power conversion efficiencies, which have motivated the fabrication of other optoelectronic devices such as light-emitting diodes, lasers and photodetectors. Their superior material and optical properties are shared by the counterpart colloidal nanocrystals (NCs), with the additional advantage of quantum confinement that can yield size-dependent optical emission ranging from the near-UV to -infrared wavelengths. So far, intensive research efforts have been devoted to the optical characterization of perovskite NC ensembles, revealing not only fundamental exciton relaxation and recombination dynamics but also low-threshold amplified spontaneous emission and novel superfluorescence effects. Meanwhile, the application of single-particle spectroscopy techniques to perovskite NCs has helped to resolve a variety of optical properties for which there are few equivalents in traditional colloidal NCs, mainly including nonblinking photoluminescence, suppressed spectral diffusion, stable exciton fine structures and coherent single-photon emission. While the main purpose of ensemble optical studies is to guide the smooth development of perovskite NCs in classical optoelectronic applications, the rich observations from single-particle optical studies mark the emergence of a potential platform that can be exploited for quantum information technologies.
The discovery and understanding of many ultrafast dynamic processes are invaluable. This paper reports framing imaging based on non-collinear optical parametric amplification (FINCOPA), which applies non-collinear optical parametric amplification (NCOPA), for the first time, to single-shot ultrafast optical imaging with high spatiotemporal resolution. By using a laser-induced air plasma grating as a target, FINCOPA has experimentally realized 50 fs-resolved optical imaging with a spatial resolution of ~83 lp/mm and an effective frame rate of 10 trillion frames per second (Tfps). It has also successfully visualized an ultrafast rotating optical field with an effective frame rate of 15 Tfps. This setup has great potential to simultaneously achieving a femtosecond-level temporal resolution and frame interval, a micrometer-level spatial resolution, and a large frame number, thus will contribute to high-spatiotemporal-resolution observations of ultrafast transient events with durations down to the femtosecond scale, such as atomic or molecular dynamics in photonic material, plasma physics, and laser inertial-confinement fusion.
PDF全文 (下载：4) Advanced Photonics ，年第卷第期 pp.
Microwave, which has ~10 cm long wavelength, can penetrate deeper into tissue than photons, heralding exciting deep tissue applications such as modulation or imaging via thermo-acoustic (TA) effect. However, the TA conversion efficiency is very low even with an exogenous contrast agent. Here, we break this low conversion limit through using a split ring resonator (SRR) to effectively collect and confine the microwave into a sub-millimeter hot spot for ultrasound emission, and achieve over two thousand times higher conversion efficiency than reported TA contrast agents. Importantly, the frequency of emitted ultrasound can be precisely tuned and multiplexed by modulation of the microwave pulses. This is inaccessible by a piezoelectric-based transducer or a photoacoustic emitter and opens new opportunities to study the frequency response of cells in ultrasound bio-modulations. For applications in deep tissue localization, we further harness the SRR as a wireless, battery-free ultrasound becaon placed under a breast phantom.
PDF全文 (下载：3) Advanced Photonics ，年第卷第期 pp.