Plasmonic antenna hybrids for active control in the near and midinfrared

Resumen del trabajo presentado a la Spanish Conference on Nanophotonics (Conferencia Española de Nanofotónica-CEN), celebrada en Donostia-San Sebastián (España) del 3 al 5 de octubre de 2018.Hybrid platforms combining metallic plasmonic nanoantennas (NAs) and materials with interesting properties as phase-change or spintronics offer excellent technological opportunities for active plasmonics, as they can provide large changes in their optical response. In this talk I will demostrate first how gold NAs grown on vanadium dioxie (VO2), characterized by a reversible insulator-to-metal transition (IMT) at around 68ºC, can improve the performance of this material by providing an efficient enhancement mechanism for both the optically induced excitation and readout. Using picosecond laser pulses a highly localized phase transition is driven in nanoscale regions around the NAs. These antennas-VO2 hybrid solutions provide a conceptual framework to merge field localization and phase transition enabling nanoscale optical memory functionalities. In the second part I will show how the combination of Au microantenna arrays with a Ni81Fe19/Au multilayer supports provide metamaterial platforms with new functionalities. In this case, the plasmon resonance sustained by the NAs alliate with the GMR and MRE effects of the multilayer to allow low magnetic-field controlled modulation in the mid-infrared, where light modulation is very challenging. This approach establishes a roadmap for spintronically-controlled devices in the whole mid-IR to THz band.Peer Reviewe

PEMBELAJARAN LUKIS TOTEBAG PADA MATA PELAJARAN SENI BUDAYA DI KELAS X MIA 3 SMA NEGERI 3 BOYOLALI TAHUN AJARAN 2017/2018

ABSTRAK Muhammad Fahmi Al Amiq. PEMBELAJARAN LUKIS PADA TOTEBAG DALAM MATA PELAJARAN SENI BUDAYA DI KELAS X MIA 3 SMA NEGERI 3 BOYOLALI TAHUN AJARAN 2017/2018. Skripsi, Fakultas Keguruan dan Ilmu Pendidikan, Universitas Sebelas Maret Surakarta, Januari 2018. Tujuan penelitian ini adalah untuk mengetahui: (1) Proses pelaksanaan pembelajaran Lukis Totebag di kelas X MIA 3 SMA Negeri 3 Boyolali tahun ajaran 2017/2018. Dan (2) Bagaimana bentuk hasil karya Lukis Totebag yang dihasilkan siswa di kelas X MIA 3 SMA Negeri 3 Boyolali tahun ajaran 2017/2018. Penelitian ini menggunakan pendekatan kualitatif. Sumber data yang digunakan adalah informan yang dipilih yaitu Bapak Subandiyo S.Pd selaku guru mata pelajaran seni budaya di kelas X MIA 3 SMA Negeri 3 Boyolali, serta foto proses pembelajaran, hasil karya siswa dan dokumen arsip. Teknik yang digunakan dalam pengumpulan data adalah observasi langsung, wawancara terstruktur dan mendalam, serta dokumentasi. Uji validitas data dilakukan dengan membandingkan sumber data yang di peroleh berupa daftar hasil wawancara dengan Bapak Subandiyo S.Pd selaku guru mata pelajaran Seni Budaya dengan siswa di kelas X MIA 3 SMA Negeri 3 Boyolali, serta review informant. Analisis data yang digunakan adalah model analisis mengalir, yaitu: reduksi data, sajian data, dan penarikan kesimpulan. Hasil penelitian ini menunjukkan bahwa: (1) Pembelajaran Lukis Totebag diawali dengan pembuatan RPP, selanjutnya pembelajaran dilaksanakan selama tiga kali pertemuan. Strategi yang digunakan guru dalam pembelajaran ini adalah pendekatan scientific. Metode pembelajaran yang digunakan meliputi metode ceramah, tanya jawab, diskusi, dan pemberian tugas. Media pembelajaran yang digunakan berupa slide power point dan media visual berupa sampel karya dari guru. Evaluasi pembelajaran dilakukan dengan menilai aspek kognitif, afektif, dan psikomotorik. Proses pembuatan karya dilakukan dengan beberapa langkah, yaitu membuat sketsa, proses pewarnaan, dan finishing. (2) Secara umum pembuatan karya lukis totebag siswa sudah baik, teknik lukis pada pewarnaan dan finishing dalam membuat karya lukis totebag sudah baik. Karya lukis totebag yang dihasilkan oleh siswa sudah mengandung unsur-unsur seni rupa, yaitu: garis, bentuk, bidang, gelap terang, dan warna. Selain itu, karya lukis totebag yang dihasilkan oleh siswa juga sudah mengandung prinsip-prinsip seni rupa, yaitu: irama (rhytm), dominasi (dominance), keseimbangan (balance), kesatuan (unity), keserasian (harmony), dan kesebandingan (proportion). Kata Kunci: Seni Budaya, Pembelajaran Seni Rupa, Lukis Toteba

Direct observation of multimode interference in rare-earth doped micro/nanofibers

Modal inspection of optical fibers is important for multimode application but it ischallenging to collect in-situ information of propagating modes for evaluation and manipulation. Here we demonstrate direct observation of multimode interference in Er3+/Yb3+co-doped micro/nanofibers. Luminescent interference patterns are visualized by visible up-conversion of Er3+ ions and are used for establishing the existence of higher order modes co-propagating with fundamental modes. We use fast Fourier transform to analyze the patterns in detail and obtain excellent agreement between experiment and calculation on beat lengths of the interference. Effective index differences among higher order modes and a fundamental mode of a microfiber are also experimentally investigated with the assistance of interference patterns, revealing the characteristic of modal dispersions

Dataset for "Direct observation of multimode interference in rare-earth doped micro/nanofibers"

Data supporting the paper Bigeng Chen, Qingyang Bao and Limin Tong &#39;Direct observation of multimode interference in rare-earth doped micro/nanofibers&#39; Optics Express</span

The predictive value of PD‐L1 expression in patients with advanced hepatocellular carcinoma treated with PD‐1/PD‐L1 inhibitors: A systematic review and meta‐analysis

Abstract Background and Aim Programmed death 1 (PD‐1) and programmed death ligand 1 (PD‐L1) inhibitors have transformed the treatment landscape of advanced hepatocellular carcinoma (HCC), but consistent responses are not observed in all patients, and prognostic biomarkers to guide treatment decisions are lacking. We aimed to evaluate the predictive value of PD‐L1 expression in advanced HCC patients treated with PD‐1/PD‐L1 inhibitors. Methods A comprehensive search of PubMed, Embase, Web of Science, and the Cochrane Library was conducted. Studies comparing the objective response rate (ORR) and/or disease control rate (DCR) based on the tumor PD‐L1 status of HCC were included. Results Eleven studies with 1,330 HCC patients treated with PD‐1/PD‐L1 inhibitors were included. Pooled odds ratio (OR) analysis demonstrated a significantly improved ORR in PD‐L1‐positive patients compared with PD‐L1‐negative patients (OR, 1.86, 95% CI, 1.35–2.55). Similar results were observed in the anti‐PD‐1 treatment (p < 0.001) and anti‐PD‐1/PD‐L1 monotherapy (p < 0.001) subgroups. The pooled ORRs in the PD‐L1‐positive and PD‐L1‐negative groups were 26% (95% CI, 20%–32%) and 18% (95% CI, 13%–22%), respectively. For DCR, the pooled OR analysis showed no significant difference between PD‐L1‐positive patients and PD‐L1‐negative patients (66% [95% CI, 55%–76%] vs. 69% [95% CI, 62%–76%]; OR, 0.92, 95% CI, 0.59–1.44). The results were consistent across the drug target and combination treatment subgroups. Conclusion Positive PD‐L1 expression is associated with a better ORR in advanced HCC patients treated with anti‐PD‐1/PD‐L1‐based therapies. This feature can help to identify HCC patients who will benefit most from PD‐1/PD‐L1 inhibitors

Real-time phase trimming of Mach-Zehnder interferometers by femtosecond laser annealing of Germanium implanted waveguides

We demonstrate a real-time trimming technique, enabling accurate and permanent correction of typical fabrication based phase errors of integrated Mach-Zehnder Interferometers (MZIs). The output signal can be monitored during entire annealing process

Remote optical testing and reconfiguration of silicon photonic circuits with ultrafast photomodulation spectroscopy

International audienc

Real-time monitoring and gradient feedback enable accurate trimming of ion-implanted silicon photonic devices

Fabrication errors pose significant challenges on silicon photonics, promoting postfabrication trimming technologies to ensure device performance. Conventional approaches involve multiple trimming and characterization steps, impacting overall fabrication complexity. Here we demonstrate a highly accurate trimming method combining laser annealing of germanium implanted silicon waveguide and real-time monitoring of device performance. Direct feedback of the trimming process is facilitated by a differential spectroscopic technique based on photomodulation. The resonant wavelength trimming accuracy is better than 0.15 nm for ring resonators with 20-μm radius. We also realize operating point trimming of Mach-Zehnder interferometers with germanium implanted arms.A phase shift of 1.2π is achieved by annealing a 7-μm implanted segment

Dataset for [Real-time monitoring and gradient feedback enable accurate trimming of ion-implanted silicon photonic devices]

This is the dataset of the article of &quot;Real-time monitoring and gradient feedback enable accurate trimming of ion-implanted silicon photonic devices&quot; published in Optics Express</span