搜索结果: 16-30 共查到“物理学 lasers”相关记录48条 . 查询时间(0.093 秒)
Photon-induced carrier transport in high efficiency midinfrared quantum cascade lasers
Photon-induced carrier transport midinfrared quantum cascade lasers Optics
2011/8/18
Abstract: A midinfrared quantum cascade laser with high wall-plug efficiency is analyzed by means of an ensemble Monte Carlo method. Both the carrier transport and the cavity field dynamics are includ...
Coupled-wave model for square-lattice photonic-crystal lasers with TE polarization -- a general approach
Coupled-wave model square-lattice photonic-crystal lasers TE polarization
2011/8/3
Abstract: A general coupled-wave model is presented for square-lattice photonic crystal (PC) lasers with transverse-electric polarization. This model incorporates the high-order coupling effects that ...
Temperature performance analysis of terahertz quantum cascade lasers: Vertical versus diagonal designs
Temperature performance analysis terahertz quantum cascade lasers Vertical versus diagonal designs
2011/9/14
Resonant phonon depopulation terahertz quantum cascade lasers based on vertical and diagonal lasing transitions are systematically compared using a well established ensemble Monte-Carlo approach. The ...
Unconventional modes in lasers with spatially varying gain and loss
lasers spatially varying gain and loss
2011/9/2
We discuss a class of lasing modes created by a spatially inhomogeneous gain pro le. These lasing modes are \extra modes", in addition to, and very di erent from, conventional lasing modes,which arise...
Modeling bound-to-continuum terahertz quantum cascade lasers: The role of Coulomb interactions
Modeling bound-to-continuum terahertz quantum cascade lasers Coulomb interactions
2011/9/14
Based on an ensemble Monte Carlo analysis, we show that Coulomb interactions play a dominant role in boundto-continuum terahertz quantum cascade lasers and thus require careful modeling. Coulomb inter...
Monte-Carlo-based spectral gain analysis for THz quantum cascade lasers
THz quantum cascade lasers Monte-Carlo-based spectral gain analysis
2011/9/14
Employing an ensemble Monte Carlo transport simulation, we self-consistently analyze the spectral gain for different THz quantum cascade laser structures, considering bound-to-continuum as well as res...
Monte Carlo study of carrier-light coupling in terahertz quantum cascade lasers
Monte Carlo carrier-light coupling terahertz quantum cascade lasers
2011/9/14
We present a method for self-consistently including the optical cavity field into Monte Carlo-based carrier transport simulations. This approach allows for an analysis of the actual lasing operation i...
Doping effects in AlGaAs lasers with separate confinement heterostructures (SCH). Modeling optical and electrical characteristics with Sentaurus TCAD
Modeling optical and electrical AlGaAs lasers
2011/9/1
Optical and electrical characteristics of AlGaAs lasers with sep-arate confinement heterostructures are modeled by using Synopsys’s Sentaurus TCAD and open source software for semi-automatic data anal...
Timing jitter optimization of mode-locked Yb-fiber lasers toward the attosecond regime
Fluctuations relaxations and noise Ultrafast lasers
2011/8/29
We demonstrate ultra-low timing jitter optical pulse trains from freerunning,80 MHz repetition rate, mode-locked Yb-fiber lasers. Timing jitter of various mode-locking conditions at close-to-zero intr...
Crowd synchrony and quorum sensing in delay-coupled lasers
Crowd synchrony quorum sensing delay-coupled lasers
2010/11/16
Crowd synchrony and quorum sensing arise when a large number of dynamical elements communicate with each other via a common information pool. Previous evidence in different fields, including chemistr...
A technique for regulating the tempo of heartbeats with short flashes of light could lead to a less intrusive type of pacemaker, say researchers in the US. A team led by Andrew Rollins at Case Western...
Chaos-assisted directional light emission from microcavity lasers
light emission microcavity lasers
2010/4/6
We study the effect of dynamical tunneling on emission from ray-chaotic microcavities by introducing a suitably designed deformed disk cavity. We focus on its high quality factor modes strongly locali...
Hail the first sound ‘lasers’（图）
the first phonon "lasers" coherent sound waves the megahertz range
2010/3/26
Two independent groups of physicists have unveiled the first phonon "lasers" – devices that emit coherent sound waves in much the same ways as lasers emit coherent light waves. Sometimes called "saser...
Lasers zap fusion doubts at NIF（图）
Lasers fusion NIF
2010/2/24
Researchers in the US say they have made a crucial breakthrough towards achieving laser fusion and that they expect to generate the conditions for a sustained nuclear reaction by the end of the year. ...
Comparison study of the charge density distribution induced by heavy ions and pulsed lasers in silicon
heavy ion pulsed laser charge density distribution
2009/12/24
Heavy ions and pulsed lasers are important means to simulate the ionization damage effects on semiconductor materials. The analytic solution of high-energy heavy ion energy loss in silicon has been ob...