Close

Search

Search Menu
Photonics Media Photonics Buyers' Guide Photonics EDU Photonics Spectra BioPhotonics EuroPhotonics Industrial Photonics Photonics Showcase Photonics ProdSpec Photonics Handbook
More News
SPECIAL ANNOUNCEMENT
2016 Photonics Buyers' Guide Clearance! – Use Coupon Code FC16 to save 60%!
share
Email Facebook Twitter Google+ LinkedIn Comments

Integrated Electro-Optic Modulators/Nanowire Lasers Demonstrated

Photonics Spectra
Nov 2005
In the Oct. 10 issue of Applied Physics Letters, scientists at Harvard University in Cambridge, Mass., report the integration of electro-optic modulators with lasers based on crystalline nanowires. The devices may have a role in the development of nanophotonic systems for multiplexed optical sensing and for optical information storage and processing.

Using metallorganic vapor phase epitaxy and pulsed laser deposition growth techniques, the investigators produced CdS and GaN nanowires. They added electrodes either above and below or alongside the structures to act as a parallel-plate or fringe-field electro-optic modulator, respectively.

To characterize the performance of the devices, they optically excited the nanowires with either 405-nm light from a Ti:sapphire laser or 266-nm radiation from an Nd:YVO4, applied a time-varying voltage to the electrodes and monitored the effect on the emission intensity. Modulation versus voltage measurements demonstrated no shift in the peak emission wavelength of the nanowire lasers and indicated modulation as high as 40 percent in the CdS device. Experiments performed on devices operating at below the lasing threshold indicated that an electroabsorption mechanism is responsible for the effect.


Comments
Terms & Conditions Privacy Policy About Us Contact Us
back to top

Facebook Twitter Instagram LinkedIn YouTube RSS
©2016 Photonics Media
x Subscribe to Photonics Spectra magazine - FREE!