Results 81 to 90 of about 117,216 (290)

Mid-IR frequency measurement using an optical frequency comb and a long-distance remote frequency reference

, 2012
We have built a frequency chain which enables to measure the absolute frequency of a laser emitting in the 28-31 THz frequency range and stabilized onto a molecular absorption line. The set-up uses an optical frequency comb and an ultrastable 1.55 $\mu$m
Amy-Klein, Anne, Auguste, Frédéric, Chanteau, Bruno, Chardonnet, Christian, Coq, Yann Le, Darquié, Benoît, Lopez, Olivier, Santarelli, Giorgio, Zhang, Wei   +8 more
core   +2 more sources

Polymer‐in‐Cage Strategy for Pore Tuning of High‐Aspect Ratio ZIF Nanoplate: Toward Sub‐Micrometer‐Thick Large Area CO2 Separation Membranes

Advanced Science, EarlyView.
A “polymer‐in‐cage” strategy transforms a zinc‐acrylate copolymer into an active pore‐modulating agent for ZIF‐8 nanoplates. The polymer actively tunes the MOF's pore structure by anchoring within its windows, while the nanoplates create tortuous pathways.
Minsu Kim, Hyo Jun Min, Min Kyu Choi, Ki Chul Kim, Bomi Kim, Miso Kang, Nahyeon Lee, Kiwon Eum, Jong Hak Kim, Dae Woo Kim   +9 more
wiley   +1 more source

Terahertz quantum cascade laser frequency combs with engineered operation frequency around 4.0 THz

AIP Advances
Freely engineering the operation frequency of frequency comb sources is crucial for various applications, e.g., high-precision spectroscopy, ranging, communications, and so on. Here, by employing band structure simulations, group velocity dispersion (GVD)
Shumin Wu, Kang Zhou, Ziping Li, Xuhong Ma, Chenjie Wang, Binbin Liu, Wenjian Wan, Zhenzhen Zhang, Hua Li   +8 more
doaj   +1 more source

Tunable frequency combs based on dual microring resonators

, 2015
In order to achieve efficient parametric frequency comb generation in microresonators, external control of coupling between the cavity and the bus waveguide is necessary.
Dutt, Avik, Farsi, Alessandro, Gaeta, Alexander L., Lipson, Michal, Luke, Kevin, Miller, Steven A., Okawachi, Yoshitomo, Ramelow, Sven   +7 more
core   +1 more source

Lossless equalization of frequency combs [PDF]

Optics Letters, 2008
Frequency combs obtained by sinusoidal phase modulation of narrowband cw lasers are widely used in the field of optical communications. However, the resulting spectral envelope of the comb is not flat. We propose a general and efficient approach to achieve flat frequency combs with tunable bandwidth. The idea is based on a two-step process.
Torres Company, Víctor, Lancis, Jesús, Andrés, Pedro   +2 more
openaire   +3 more sources

Biomimetic Cell Membrane‐Coated MOFs System for Targeted Cancer Therapy

Advanced Science, EarlyView.
Biomimetic MOF‐based drug delivery nanoplatforms synthesized using liposomes or cell membranes as camouflage for multiple cancer therapeutics. ABSTRACT The integration of metal‐organic frameworks (MOFs) with cell membrane coatings has emerged as a revolutionary strategy to enhance the therapeutic efficacy of cancer nanomedicine.
Qilu Wu, Jia Song Deon Chon, Yuxiao Feng, Kang Liang, Shiming Li, Can Yang Zhang, Jun Ge   +6 more
wiley   +1 more source

Coherent control of mid-infrared frequency comb by optical injection of near-infrared light

APL Photonics, 2023
We demonstrate the use of a low power near-infrared laser illuminating the front facet of a quantum cascade laser (QCL) as an optical actuator for the coherent control of a mid-infrared frequency comb. We show that with appropriate current control of the
Kenichi N. Komagata, Alexandre Parriaux, Mathieu Bertrand, Johannes Hillbrand, Mattias Beck, Valentin J. Wittwer, Jérôme Faist, Thomas Südmeyer   +7 more
doaj   +1 more source

Direct frequency-comb-driven Raman transitions in the terahertz range

, 2018
We demonstrate the use of a femtosecond frequency comb to coherently drive stimulated Raman transitions between terahertz-spaced atomic energy levels. More specifically, we address the $3d~^2D_{3/2}$ and $3d~^2D_{5/2}$ fine structure levels of a single ...
DePalatis, Michael V., Drewsen, Michael, Fisher, Karin, Meyer, Steffen, Solaro, Cyrille   +4 more
core   +1 more source

Dirac Surface‐State Driven Broad Spectral Band Low Quantum Energy Photoresponse in Quaternary Topological BiSbSe2Te

Advanced Science, EarlyView.
Quaternary topological BiSbSe2Te are synthesized and demonstrates a broad spectral band photoresponse, ranging from infrared to terahertz and to millimeter waves, with a particular excellence on detection of low quantum energy terahertz photons. The observed photoresponse is attributed to the excitation of plasmonic nonequilibrium electrons originating
Tianning Zhang, Jinchao Tong, Jiantian Zhang, Peng Yu, Heng Luo, Luo Yan, Boyu Yang, Tiantian Huang, Junhui Ran, Yan Chen, Liujiang Zhou, Xin Chen, Ning Dai, Jianlu Wang, Junhao Chu   +14 more
wiley   +1 more source

Versatile mid-infrared frequency-comb referenced sub-Doppler spectrometer

APL Photonics, 2018
We present a mid-IR high-precision spectrometer capable of performing accurate Doppler-free measurements with absolute calibration of the optical axis and high signal-to-noise ratio.
A. Gambetta, E. Vicentini, N. Coluccelli, Y. Wang, T. T. Fernandez, P. Maddaloni, P. De Natale, A. Castrillo, L. Gianfrani, P. Laporta, G. Galzerano   +10 more
doaj   +1 more source