APL Nameplate
  • Volume/Page
  • Keyword
  • DOI
  • Citation
  • Advanced
   
 
 
 

Flickr Twitter iResearch App Facebook

BROWSE VOLUMES

Year Range: 
Search Issue | RSS Feeds RSS
Previous Issue Next Issue

7 Mar 2005

Volume 86, Issue 10, Articles (10xxxx)

Issue Cover Spotlight Figure

Appl. Phys. Lett. 86, 103102 (2005); http://dx.doi.org/10.1063/1.1875734 (3 pages)

Tadashi Kawazoe, Kiyoshi Kobayashi, and Motoichi Ohtsu
Enlarge Image | Read More
Return to All Sections
back to top
RSS Feeds

Directive emissions from subwavelength metamaterial-based cavities

Lei Zhou, Hongqiang Li, Yaqin Qin, Zeyong Wei, and C. T. Chan

Appl. Phys. Lett. 86, 101101 (2005); http://dx.doi.org/10.1063/1.1881797 (3 pages) | Cited 33 times

Online Publication Date: 28 February 2005

Full Text: Read Online (HTML) | Download PDF

Show Abstract
We use experiment and theory to demonstrate a mechanism for directive emissions, which involves a double-plate resonance cavity made with metamaterials. In contrast to other mechanisms employing Fabry-Pérot cavities, photonic crystals, or zero index materials, our system is significantly thinner than the working wavelength and requires a smaller lateral size. We show the physics to be governed by subwavelength resonance modes unique to such metamaterial-based cavities.
Show PACS
84.40.Az Waveguides, transmission lines, striplines
41.20.Jb Electromagnetic wave propagation; radiowave propagation
02.70.Bf Finite-difference methods

Interband cascade detectors with room temperature photovoltaic operation

Jian V. Li, Rui Q. Yang, Cory J. Hill, and Shun Lien Chuang

Appl. Phys. Lett. 86, 101102 (2005); http://dx.doi.org/10.1063/1.1875758 (3 pages) | Cited 5 times

Online Publication Date: 28 February 2005

Full Text: Read Online (HTML) | Download PDF

Show Abstract
We investigated mid-infrared interband cascade laser structures as photodetectors, which are sensitive to normal incidence and operate in photovoltaic mode at room temperature. The proposed operation principle of these interband cascade detectors is based on the unique combination of interband photoexcitation and the much faster intersubband relaxation as well as interband tunneling recombination, which allows for the efficient collection of the photoexcited carriers. Peak responsivity and detectivity of 21 mA/W and 7.1×108 cm Hz1/2/W at λ = 4.0 μm are obtained for a device with cutoff wavelength of 4.4 μm. Peak responsivity and detectivity of 46 mA/W and 1.4×109 cm Hz1/2/W at λ = 3.0 μm are obtained for another device with cutoff wavelength of 3.3 μm. These detectors exhibit low noise (4.8×10−13 A/Hz1/2) and a large product of the differential resistance and active area (19 Ω cm2) at room temperature.
Show PACS
85.60.Gz Photodetectors (including infrared and CCD detectors)
42.55.Px Semiconductor lasers; laser diodes
72.40.+w Photoconduction and photovoltaic effects
73.40.Gk Tunneling

2-ps passively mode-locked Nd:YVO4 laser using an output-coupling-type semiconductor saturable absorber mirror

Ya-Xian Fan, Jing-Liang He, Yong-Gang Wang, Sheng Liu, Hui-Tian Wang, and Xiao-Yu Ma

Appl. Phys. Lett. 86, 101103 (2005); http://dx.doi.org/10.1063/1.1879099 (3 pages) | Cited 29 times

Online Publication Date: 28 February 2005

Full Text: Read Online (HTML) | Download PDF

Show Abstract
We have demonstrated stable self-starting passive mode-locking in a diode-end-pumped Nd:YVO4 laser using a semiconductor saturable absorber mirror (SESAM). An In0.25Ga0.75As single quantum-well SESAM, which was grown by the metalorganic chemical-vapor deposition technique at low temperature, acts as a passive mode-locking device and an output coupler at the same time. Continuous-wave mode-locked transform-limited pulses were obtained at 1064 nm with a pulse duration of 2.1 ps and an average output power of 1.28 W at a repetition rate of 96.5 MHz.
Show PACS
42.55.Px Semiconductor lasers; laser diodes
85.35.Be Quantum well devices (quantum dots, quantum wires, etc.)
42.60.Fc Modulation, tuning, and mode locking
42.79.Bh Lenses, prisms and mirrors
42.60.Jf Beam characteristics: profile, intensity, and power; spatial pattern formation
42.55.Rz Doped-insulator lasers and other solid state lasers

Vortex-like surface wave and its role in the transient phenomena of meta-material focusing

Lei Zhou and C. T. Chan

Appl. Phys. Lett. 86, 101104 (2005); http://dx.doi.org/10.1063/1.1879104 (3 pages) | Cited 10 times

Online Publication Date: 28 February 2005

Full Text: Read Online (HTML) | Download PDF

Show Abstract
We show that a slab of meta-material (with ε = μ = −1+iΔ) possesses a vortex-like surface wave with no ability to transport energy, whose nature is completely different from a localized mode or a standing wave. Through computations based on a rigorous time-dependent Green’s function approach, we demonstrate that such a mode inevitably generates characteristic image oscillations in two-dimensional focusing with even a monochromatic source, which were observed in many numerical simulations, but such oscillations are weak in three-dimensional focusing.
Show PACS
41.20.Jb Electromagnetic wave propagation; radiowave propagation

Monolithic integration of vertical-cavity surface-emitting lasers with in-plane waveguides

Jeremy Witzens, Axel Scherer, Gregory Pickrell, Duane Louderback, and Peter Guilfoyle

Appl. Phys. Lett. 86, 101105 (2005); http://dx.doi.org/10.1063/1.1880440 (3 pages) | Cited 1 time

Online Publication Date: 2 March 2005

Full Text: Read Online (HTML) | Download PDF

Show Abstract
The ability to couple light from a vertical-cavity surface-emitting laser into a planar, on-chip waveguide creates new opportunities for achieving higher levels of integration and functionality. Here we propose to use a strong grating etched into a waveguide defined into the top layer of the epitaxially grown structure, so that epitaxial regrowth is not required. By introducing a defect mode into the cavity we were able to achieve a 40% coupling efficiency even though light is coupled through a ninety degrees bend. We also show that polarization control of the vertical-cavity surface-emitting laser is enhanced by coupling to the defect mode. Calculations were performed using the finite-difference time-domain method.
Show PACS
42.55.Px Semiconductor lasers; laser diodes
42.82.Et Waveguides, couplers, and arrays
85.60.Bt Optoelectronic device characterization, design, and modeling
42.82.Bq Design and performance testing of integrated-optical systems
42.79.Gn Optical waveguides and couplers
42.60.Da Resonators, cavities, amplifiers, arrays, and rings
42.79.Dj Gratings

Measurements of energy fluctuations of a saturated 46.9 nm Ar laser produced in Z-pinch capillary discharges

A. Ritucci, G. Tomassetti, A. Reale, L. Reale, F. Flora, and L. Mezi

Appl. Phys. Lett. 86, 101106 (2005); http://dx.doi.org/10.1063/1.1882748 (3 pages) | Cited 1 time

Online Publication Date: 3 March 2005

Full Text: Read Online (HTML) | Download PDF

Show Abstract
We report on the achievement of significant energy stability in a 46.9 nm soft x-ray laser pumped by fast Z-pinch capillary discharges. The energy stability, investigated over, hundreds of shots, is optimized by operating the laser in the highly saturated regime using capillary discharges with length up to 45 cm. We demonstrate standard deviation on the energy fluctuations smaller than ±5% and an energy∕pulse of 300 μJ at 0.2 Hz. These results demonstrate the reliability of this soft x-ray laser for its widespread use for the development of applications.
Show PACS
42.55.Vc X- and γ-ray lasers
42.55.Lt Gas lasers including excimer and metal-vapor lasers
42.60.Da Resonators, cavities, amplifiers, arrays, and rings
42.60.Jf Beam characteristics: profile, intensity, and power; spatial pattern formation
52.38.Dx Laser light absorption in plasmas (collisional, parametric, etc.)
52.25.Os Emission, absorption, and scattering of electromagnetic radiation
52.58.Lq Z-pinches, plasma focus, and other pinch devices

Compact wavelength monitoring by lateral outcoupling in wedged photonic crystal multimode waveguides

E. Viasnoff-Schwoob, C. Weisbuch, H. Benisty, C. Cuisin, E. Derouin, O. Drisse, G-H. Duan, L. Legouézigou, O. Legouézigou, F. Pommereau, S. Golka, H. Heidrich, H. J. Hensel, and K. Janiak

Appl. Phys. Lett. 86, 101107 (2005); http://dx.doi.org/10.1063/1.1879105 (3 pages) | Cited 21 times

Online Publication Date: 3 March 2005

Full Text: Read Online (HTML) | Download PDF

Show Abstract
A device concept for laterally extracting selected wavelengths from an optical signal traveling along a waveguide, for operation in metropolitan area networks, is presented. The signal on the fundamental mode of a multimode photonic crystal waveguide is coupled to a higher-order mode, at a center frequency that spatially depends on the slowly varying guide parameters. The device is compact, intrinsically fault tolerant, and can split any desired fraction of the signal for monitoring purpose. Characterizations by the internal light source technique validate the optical concept whereas an integrated device with four photodiodes qualifies its potential with respect to real-world applications.
Show PACS
84.40.Ua Telecommunications: signal transmission and processing; communication satellites
42.79.Sz Optical communication systems, multiplexers, and demultiplexers
42.82.Et Waveguides, couplers, and arrays
42.79.Gn Optical waveguides and couplers

Direct observation of coherent rotational excitation, dephasing and depopulation of methanol and its isotopes using THz pulse radiation

B. L. Yu, Y. Yang, F. Zeng, X. Xin, and R. R. Alfano

Appl. Phys. Lett. 86, 101108 (2005); http://dx.doi.org/10.1063/1.1882759 (3 pages) | Cited 4 times

Online Publication Date: 4 March 2005

Full Text: Read Online (HTML) | Download PDF

Show Abstract
Coherent transients are directly observed in the time-domain as a sequence of decreasing commensurate pulses in methanol (CH3OH) and its isotopes (CH3OD and CD3OD) gases to yield fundamental information on its dephasing and depopulation. The delay times between coherent pulses of ∼ 21, 22, and 26 ps are measured for the CH3OH, CH3OD, and CD3OD corresponding to the inverse of rotational energy spacing for ΔJ = ±1 transitions, respectively. The dephasing time T2 = 23±0.5 ps and depopulation time T1 = 48±0.5 ps were measured for CH3OH at room temperature.
Show PACS
33.20.Bx Radio-frequency and microwave spectra
34.50.Ez Rotational and vibrational energy transfer
33.15.Mt Rotation, vibration, and vibration-rotation constants
42.50.Md Optical transient phenomena: quantum beats, photon echo, free-induction decay, dephasings and revivals, optical nutation, and self-induced transparency
Return to All Sections
Close

Google Calendar

ADVERTISEMENT

Go to AIP Home   © AIP Publishing LLC
close