[Laser] Optical Beam-Steering (working URL)

[John McNulty]

Apologies Glenn,

You should be able to get it from here…
http://www.opticsinfobase.org/oe/abstract.cfm?uri=oe-21-4-5198
The on-page links won't work in email but if you go to that URL and then click - it should give you the PDF.
Best,
J McN
	
Electronically controlled optical beam-steering by an active phased array of metallic nanoantennas
C. T. DeRose, R. D. Kekatpure, D. C. Trotter, A. Starbuck, J. R. Wendt, A. Yaacobi, M. R. Watts, U. Chettiar, N. Engheta, and P. S. Davids  »View Author Affiliations

Optics Express, Vol. 21, Issue 4, pp. 5198-5208 (2013)
http://dx.doi.org/10.1364/OE.21.005198

View Full Text Article
Enhanced HTML    Acrobat PDF (4068 KB)


Abstract
An optical phased array of nanoantenna fabricated in a CMOS compatible silicon photonics process is presented. The optical phased array is fed by low loss silicon waveguides with integrated ohmic thermo-optic phase shifters capable of 2π phase shift with ∼ 15 mW of applied electrical power. By controlling the electrical power to the individual integrated phase shifters fixed wavelength steering of the beam emitted normal to the surface of the wafer of 8° is demonstrated for 1 × 8 phased arrays with periods of both 6 and 9 μm.

© 2013 OSA




On 23 Mar 2013, at 06:23, Glenn Thomas <glennt at gbis.com> wrote:

> Hi John
> 
> Thanks for the link. Unfortunately, I think the reflector killed the PDF long before it got anywhere near me and then added insult to injury by truncating the URL - which didn't work. Oh well, thanks for trying!
> 
> 73 de Glenn wb6w
> 
> On 3/22/2013 11:14 AM, John McNulty wrote:
>> Thanks Glenn,
>> 
>> Thought it may interest you ;-)
>> 
>> It comes from
>> http://www.opticsinfobase.org/view_article.cfm?gotourl=http%3A%2F%2Fwww%2Eopticsinfobase%2Eorg%2FDirectPDFAccess%2FC05D454C%2DD1AB%2DF9C2%2D9222E6554A8F125E%5F249484%2Foe%2D21%2D4%2D5198%2Epdf%3Fda%3D1%26id%3D249484%26seq%3D0%26mobile%3Dno&org=
>> But here's the full PDF too…
>> 
>> (SNAFU, the pdf bounced, mebbe you can extract it from your bin?)...
>> 
>> Best,
>> 
>> J McN
>> 
>> On 22 Mar 2013, at 17:44, Glenn Thomas <glennt at gbis.com> wrote:
>> 
>>> Interesting idea. Most semiconductor lasers have very poor phase coherence (let alone phase stability) because of thermal Doppler shift due to the lasing medium not being anywhere near absolute zero. The result of this is that most RF techniques based on constant or controllable phase or frequency don't work very well in the optical domain.
>>> 
>>> How does this proposed phased-array scheme get around thermal frequency/phase noise issue?
>>> 
>>> Can you provide a better link to the article/book? I didn't see anything quite like this in a Google search.
>>> 
>>> 
>>> On 3/22/2013 4:36 AM, John McNulty wrote:
>>>> Optical Beam-Steering
>>>> Ian S. Osborne
>>>> Antenna arrays have long been used for communication and sensing purposes. In the microwave and radio wavelength regime of the electromagnetic spectrum, arrays of antennas in which the phase and amplitude input to each element is varied can provide tailored beam profiles with controlled directionality. Applications can be found across many fields, from target tracking and guidance to astronomy and weather observations. Carrying over the principles of phased-array antenna technology, DeRose et al. have developed an optical phased array based on metallic nanoemitters patterned on a complementary metal-oxide semiconductor (CMOS)–compatible substrate. With the input to each antenna element fed in using a coupled waveguide integrated with a phase shifter, they show that electrical control of the phase results in wide-angle beam-steering capability. Operating at near-infrared wavelength, the ability to manipulate an optical beam over a two-dimensional area should find use in compact high-speed communication over free space.
>>>> 
>>>> Opt. Express 21, 5198 (2013).
>>> 
>>> 
>>> ______________________________________________________________
>>> Laser mailing list
>>> Home: http://mailman.qth.net/mailman/listinfo/laser
>>> Help: http://mailman.qth.net/mmfaq.htm
>>> Post: mailto:Laser at mailman.qth.net
>>> 
>>> This list hosted by: http://www.qsl.net
>>> Please help support this email list: http://www.qsl.net/donate.html
>> ______________________________________________________________
>> Laser mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/laser
>> Help: http://mailman.qth.net/mmfaq.htm
>> Post: mailto:Laser at mailman.qth.net
>> 
>> This list hosted by: http://www.qsl.net
>> Please help support this email list: http://www.qsl.net/donate.html
>> 
>> 
> 
> 
> ______________________________________________________________
> Laser mailing list
> Home: http://mailman.qth.net/mailman/listinfo/laser
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Laser at mailman.qth.net
> 
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html