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| 1 | Optical frequency synthesizer with an integrated erbium tunable laser显示文摘Optical frequency synthesizers have widespread applications in optical spectroscopy,frequency metrology,and many other fields.However,their applicability is currently limited by size,cost,and power consumption.Silicon photonics technology,which is compatible with complementary-metal-oxide-semiconductor fabrication processes,provides a low-cost,compact size,lightweight,and low-power-consumption solution.In this work,we demonstrate an optical frequency synthesizer using a fully integrated silicon-based tunable laser.The synthesizer can be self-calibrated by tuning the repetition rate of the internal mode-locked laser.A 20 nm tuning range from 1544 to 1564 nm is achieved with~10−13 frequency instability at 10 s averaging time.Its flexibility and fast reconfigurability are also demonstrated by fine tuning the synthesizer and generating arbitrary specified patterns over time-frequency coordinates.This work promotes the frequency stability of silicon-based integrated tunable lasers and paves the way toward chip-scale lowcost optical frequency synthesizers. | Ming Xin Nanxi Li Neetesh Singh Alfonso Ruocco Zhan Su Emir Salih Magden Jelena Notaros Diedrik Vermeulen Erich P.Ippen Michael R.Watts Franz X.Kartner | 2019 | Light(Science & Applications)2019，8，1： | 2 |
| 2 | Dynamics and roles of phragmoplast microfilaments in cell plate formation during cytokinesis of tobacco BY-2 cells显示文摘The phragmoplast is a special apparatus that functions in establishing a cell plate in dividing plant cells. It is known that microfilaments (MFs) are involved in constituting phragmoplast structure, but the dynamic distribution and role of phragmoplast MFs are far from being understood. In this study, the precise structure and dynamics of MFs during the initiation and the late lateral expansion of the phragmoplast were observed by using a tobacco BY-2 cell line stably expressing the microfilament reporter construct GFP-fABD2. Three-dimensional imaging showed that the phragmoplast MFs were initiated by two populations of MFs emerging between the reconstituting daughter nuclei at anaphase, which migrated to the mid-zone and gave rise to two layers of microfilament arrays. FM4-64 stained vesicles accumulated and fused with the cell plate between the two populations of MFs. The two layers of microfilament arrays of phragmoplast with ends overlapped always surrounded the centrifugally expanding cell plate. Partial disruption of MFs at metaphase by low concentration of latrunculin B resulted in the inhibition of the cell plate consolidation and the blockage of cell plate lateral expansion, whereas high concentration of latrunculin B restrained the progression of the cell cycle. Treating the cell after the initiation of phragmoplast led to the cease of the expansion of the cell plate. Our observations provide new insights into the precise structure and dynamics of phragmoplast MFs during cytokinesis and suggest that dynamic phragmoplast MFs are important in cell plate formation. | ZHANG Yan ZHANG WenJie BALUSKA Frantisek MENZEL Diedrik REN HaiYuni | 2009 | Chinese Science Bulletin2009，54，12： | 2 |
| 3 | Redistribution of actin, profilin and phosphatidylinositol-4,5-bisphosphate in growing and maturing root hairs显示文摘 | Markus Braun Frantisek Balu?ka Matthias von Witsch Diedrik Menzel | 1999 | Planta1999，，4： | 1 |
| 4 | Octave-spanning coherent supercontinuum generation in silicon on insulator from 1.06μm to beyond 2.4μm显示文摘Efficient complementary metal-oxide semiconductor-based nonlinear optical devices in the near-infrared are in strong demand.Due to two-photon absorption in silicon,however,much nonlinear research is shifting towards unconventional photonics platforms.In this work,we demonstrate the generation of an octave-spanning coherent supercontinuum in a silicon waveguide covering the spectral region from the near-to shortwave-infrared.With input pulses of 18 pJ in energy,the generated signal spans the wavelength range from the edge of the silicon transmission window,approximately 1.06 to beyond 2.4μm,with a−20 dB bandwidth covering 1.124–2.4μm.An octave-spanning supercontinuum was also observed at the energy levels as low as 4 pJ(−35 dB bandwidth).We also measured the coherence over an octave,obtaining|g_()12^(1)(λ)>90%,in good agreement with the simulations.In addition,we demonstrate optimization of the third-order dispersion of the waveguide to strengthen the dispersive wave and discuss the advantage of having a soliton at the long wavelength edge of an octave-spanning signal for nonlinear applications.This research paves the way for applications,such as chip-scale precision spectroscopy,optical coherence tomography,optical frequency metrology,frequency synthesis and wide-band wavelength division multiplexing in the telecom window. | Neetesh Singh Ming Xin Diedrik Vermeulen Katia Shtyrkova Nanxi Li Patrick T Callahan Emir Salih Magden Alfonso Ruocco Nicholas Fahrenkopf Christopher Baiocco Bill P-P Kuo Stojan Radic Erich Ippen Franz X Kärtner Michael R Watts | 2017 | Light(Science & Applications)2017，6，1： | 1 |
| 5 | Actin in living and fixed characean internodal cells: identification of a cortical array of fine actin strands and chloroplast actin rings显示文摘 | Geoffrey O. Wasteneys David A. Collings Brian E. S. Gunning Peter K. Hepler Diedrik Menzel | 1996 | Protoplasma (-)1996，，1： | 1 |
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