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

2 Aug 1999

Volume 75, Issue 5, pp. 597-739

Return to All Sections
back to top
RSS Feeds

High-speed, optically controlled surface-normal optical switch based on diffusive conduction

M. B. Yairi, C. W. Coldren, D. A. B. Miller, and J. S. Harris

Appl. Phys. Lett. 75, 597 (1999); http://dx.doi.org/10.1063/1.124452 (3 pages) | Cited 14 times

Full Text: Read Online (HTML) | Download PDF

Show Abstract
We report a surface-normal optically controlled optoelectronic modulator made from a reversed biased p-i (multiple quantum well)-n GaAs/AlGaAs structure with ultrathin barriers (5 Å) whose recovery time is based on diffusive conduction. Modulation of reflectivity from 0.3 to 0.6 and back again in about 50 ps was demonstrated using a 750 fJ control pulse at 855 nm. We also demonstrated modulated changes in power greater than the control pulse power—a type of signal gain—by a factor of 1.8-to-1. Strong changes in reflectivity combined with low required control power make this device potentially useful for high-speed switching arrays in such applications as time division demultiplexing. © 1999 American Institute of Physics.
Show PACS
42.79.Hp Optical processors, correlators, and modulators
42.79.Sz Optical communication systems, multiplexers, and demultiplexers

Multiple distributed feedback operation at 1.55 μm with uniform output powers in a single laser diode

A. Talneau, J. Charil, and A. Ougazzaden

Appl. Phys. Lett. 75, 600 (1999); http://dx.doi.org/10.1063/1.124453 (3 pages) | Cited 5 times

Full Text: Read Online (HTML) | Download PDF

Show Abstract
We demonstrate in a single laser diode the simultaneous operation on different wavelengths around 1.55 μm while preserving the spectral distributed feedback selection mechanism for each wavelength. The grating that exists all along the cavity is a multiwavelength grating obtained by the linear transfer of superimposed multiple holographic exposures. Such a grating acts as a reflectivity comb, the action of each reflector being uniformly distributed all along the cavity. Thanks to a clever incorporation of a phase shift, the lasing wavelengths are deterministically placed on the Bragg modes. The equal strengths of the different spatial frequencies of the grating translate into uniform optical output powers on the simultaneous lasing modes. © 1999 American Institute of Physics.
Show PACS
42.55.Px Semiconductor lasers; laser diodes
42.60.By Design of specific laser systems
42.60.Da Resonators, cavities, amplifiers, arrays, and rings
42.79.Dj Gratings

Microwave near-field polarimetry

A. F. Lann, M. Golosovsky, D. Davidov, and A. Frenkel

Appl. Phys. Lett. 75, 603 (1999); http://dx.doi.org/10.1063/1.124454 (3 pages) | Cited 4 times

Full Text: Read Online (HTML) | Download PDF

Show Abstract
We report a near-field microwave scanning probe which allows local phase-sensitive polarimetric measurements with a subwavelength spatial resolution (at least λ/16). The probe is a symmetrical transmitting/receiving antenna formed by two very narrow orthogonal slits fabricated at the end plate of a circular waveguide. A linearly polarized incident wave passes through one slit and is reflected from the sample mounted in the near field of the probe. A reflected wave with the incident polarization is received by the same slit, while the orthogonal polarization component is received by another, orthogonal slit. Our probe is very sensitive to local inhomogeneities and may be also useful for mapping Hall mobilities in semiconductors. © 1999 American Institute of Physics.
Show PACS
07.57.-c Infrared, submillimeter wave, microwave and radiowave instruments and equipment
72.20.Ee Mobility edges; hopping transport
72.20.My Galvanomagnetic and other magnetotransport effects

Dynamical diffraction in metallic optical gratings

M. M. J. Treacy

Appl. Phys. Lett. 75, 606 (1999); http://dx.doi.org/10.1063/1.124455 (3 pages) | Cited 84 times

Full Text: Read Online (HTML) | Download PDF

Show Abstract
I show that dynamical diffraction of light in thin metallic gratings causes strong fluctuations in the transmitted intensity when the optical wavelength is comparable to the grating periodicity. The relative excitation of propagating Bloch waves in the grating depends on the incident wave vector. Bloch waves that peak in amplitude in the metal are strongly absorbed, whereas Bloch waves that peak in the holes are weakly absorbed. Anomalously high transmission occurs when the latter Bloch waves are strongly excited. Since surface plasmons are associated with the evanescent modes of the diffracted wavefield, I argue that the propagating diffracted beams and the surface plasmons are both part of the same dynamical scattering process. © 1999 American Institute of Physics.
Show PACS
42.79.Dj Gratings
Return to All Sections
Close

Google Calendar

ADVERTISEMENT

Go to AIP Home   © AIP Publishing LLC
close