Results 251 to 260 of about 106,674 (292)

Terahertz All‐Optical Molecule‐ Plasmon Modulation

Advanced Materials, 2006
J. Dintinger, I. Robel, P. V. Kamat, C. Genet, T. W. Ebbesen   +4 more
openaire   +3 more sources

Ultrafast all-optical plasmonic graphene modulator

Applied Optics, 2018
By utilizing the ultrafast dynamics of the photo-excited electrons in graphene, we theoretically present an ultrafast all-optical plasmonic modulator. With the help of an external pump, the femtosecond thermodynamics of the hot carriers can tune the Fermi level of the graphene sheet in less than 1 ps, which is the dependence of the support for the ...
Feng, Zhou, Wei, Du
openaire   +2 more sources

Population shelved all-optical modulation

Physical Review B, 2003
An all-optical modulation method is proposed and experimentally demonstrated to overcome the modulation bandwidth limitations, imposed by the excited-state population decay rate, in a conventional resonant optical modulator. In the experimental demonstration, we have observed an all-optical modulation bandwidth 200 times wider than the population decay
B. S. Ham, P. R. Hemmer
openaire   +1 more source

All-optical spatial light modulator with megahertz modulation rates

Optics Letters, 1995
We demonstrate a novel all-optical spatial light modulator capable of megahertz modulation rates. It is based on the quantum-confined Stark effect, but the modulating electric field is entirely photogenerated by strongly asymmetric photocarrier transfer in GaAs/AlAs layers.
N T, Pelekanos, B, Deveaud, J M, Gérard, H, Haas, U, Strauss, W W, Rühle, J, Hebling, J, Kuhl   +7 more
openaire   +2 more sources

CdTe:In MONOCRYSTAL MODULES FOR ALL-OPTICAL PROCESSING

Journal of Nonlinear Optical Physics & Materials, 1996
The aim of this work is to present the application of photoconductive properties of electro-optical n-doped CdTe:In single crystals to all-optical processing of signals at λ=1550 nm. The mechanism exploits the photogeneration of charge carriers from deep intragap energy levels and their trap-limited drift process under the action of an externally ...
PIETRALUNGA, SILVIA MARIA, BOFFI, PIERPAOLO, MARTINELLI, MARIO   +2 more
openaire   +2 more sources

Ultrafast All-Optical Modulation in 2D Hybrid Perovskites

ACS Nano, 2019
Two-dimensional (2D) hybrid organic-inorganic Ruddlesden-Popper perovskites (RPPs) have been recently shown to exhibit large nonlinear optical properties due to the strong excitonic effects present in their multiple quantum wells. In this work, we use nondegenerate pump-probe spectroscopy in the 600-1000 nm wavelength range to study the influence of ...
Gustavo Grinblat, Ibrahim Abdelwahab, Michael P. Nielsen, Paul Dichtl, Kai Leng, Rupert F. Oulton, Kian Ping Loh, Stefan A. Maier   +7 more
openaire   +3 more sources

All-optical phase-locked modulator

Optical Society of America Annual Meeting, 1990
An all-fiber erbium-glass laser has been mode locked using an optically-controllable Sagnac loop mirror. By tuning the cavity length of the control laser, cw oscillation of the erbium laser has been observed at frequencies up to 13.8 GHz.
Norman A. Whitaker, H. H. Houh, H. Avramopoulos   +2 more
openaire   +1 more source

Analytical approach to all-optical modulation by cascading

Optics Letters, 1995
We study analytically all-optical modulation by cascading in type II second-harmonic generation and show that this configuration is promising for all-optical signal processing, provided that it is operated near phase matching. Conditions for an effective transistorlike action are derived.
A. KOBYAKOV, U. PESCHEL, R. MUSCHALL, ASSANTO, GAETANO, V. P. TORCHIGIN, F. LEDERER   +5 more
openaire   +3 more sources

All-optical graphene oxide microfiber modulator

Metamaterials, Metadevices, and Metasystems 2020, 2020
In recent decades, research in the field of optoelectronics has attracted great interest. Modulators are one of the most usable optical components in the optical communication systems. The most important parameters for a modulator are high modulation speed, small footprint, and large optical bandwidth.
Elaheh Zamani, Mohammad Malekmohammad
openaire   +1 more source

Ultra-Broadband All-Optical Graphene Modulator

IEEE Photonics Technology Letters, 2018
In this letter, a monolayer graphene-clad microfiber device is designed to achieve ultra-broadband all-optical modulation. Based on the broadband advantage of graphene, we sufficiently discussed the priority absorption characteristic of graphene and continuous wave light saturated absorption characteristic of composite waveguide.
Y. Liao, Guoying Feng, H. Zhou, J. Mo, H. J. Sun, S. H. Zhou   +5 more
openaire   +1 more source