Talk:Photonic crystal

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Changing the title of "Fabrication Challenges" Section

I think this should be renamed to "Fabrication" rather than "Fabrication Challenges. While it may be difficult to fabricate photonic crystals for optical wavelength, it is indeed possible using Electron beam lithography, Focused ion beam or simply an advanced integrated circuit process. The challenges can be mentioned, but I think it is more insightful to talk about how photonic crystals are fabricated, rather than simply state that it is difficult to make them. What does everyone think?

vlado4 01:19, 8 April 2007 (UTC)

BBC Light storage article

Any scientists out there think there could be an application of this science Media:http://news.bbc.co.uk/2/hi/science/nature/4443854.stm to store light using directed propogation of electromagnetic waves, rendering them and -- instead of spontaneous emissions such as found in Photonic crystals -- allow for controlled emissions?

This application could solve the world's energy crisis, completely removing the need for fossil fuels or nuclear power in order to create light. Storing it in such a matter for later use?

Or am I making a mistaken assumption that light can be stored and delved out as needed in this manner?

I am imagining a global redirection of natural sunlight from the currently sunlit side of the earth absorbed in this manner and redirected to the other side of the planet to provide light as needed.

Anything is possible...Why not? But we could already do this using more conventional technology such as fibre optic cables.

--Ekimrenrob 17:59, 18 November 2005 (UTC)

Hello, wikipedia is not intended to be a general forum. Discussion should be related to the article. Perhaps you can find a general Photonic Crystals forum.

vlado4 00:51, 8 April 2007 (UTC)

Which version of English?

Does anyone know which English governs the spelling here? At the moment it is written in two with "colour" and "fiber". Dtneilson 05:06, 20 November 2006 (UTC)

It appears that the wikipedia guideline for spelling is rather ambiguous. It states that either English can be used, but authors should be consistent on this page. As of now, there is one "color" and several "colour" on this page. Personally, I would not mind changing it to the American spelling, but I think this minor issue can be overlooked until the article is more developed.

vlado4 00:51, 8 April 2007 (UTC)

Bunch of bull

Anyone with a microscope and tools and mirrors and vapor deposition equipment can create it. What do you see as an application of it?

Are you claiming that Photonic Crystals are easy to fabricate? Also, are you inquiring about applications of Photonic Crystals? Your "it" leaves much ambiguity.

vlado4 00:51, 8 April 2007 (UTC)

well i dont know, but in most applications it seems like a complex way to do simple things, like a polarizer on an LCD clock, the LED ones just give out light seen at all times!

An LED is a particularly bad example on your part, since photonic-crystal based LEDs are the basis of a successful company (http://www.luminus.com/) whose products are being used e.g. in new Samsung projection televisions. —Steven G. Johnson (talk) 05:18, 28 February 2008 (UTC)

photonic-crystal textbook available online

Hi all, we (at MIT) have recently published a new advanced-undergraduate level textbook on photonic crystals, and the publisher gave us permission to post a PDF of the book online. I suspect it would make a useful reference for readers (and editors) of this article (you are already linking my tutorial presentations), but I won't add it myself due to WP:COI. The book can be found at:

• http://ab-initio.mit.edu/book/

I'll leave it to other editors to decide whether/how to use this book in the article.

—Steven G. Johnson (talk) 05:22, 28 February 2008 (UTC)

Reference needed

Whoever added this: "Asher group at the University of Pittsburgh demonstrated the formation of three dimensional photonic crystals in the mid 1980s" to the history section, please add a reference, or I'll remove it.

I did a quick search for Asher at UNIV PITTSBURGH on Web of Science, and found a lot of papers from the 1980s on Raman spectroscopy, but none on photonic crystals.

Thank you. DMB (talk) 11:07, 4 September 2008 (UTC)

I removed "...and the Asher group at the University of Pittsburgh demonstrated the formation of three dimensional photonic crystals in the mid 1980s " as no citations are forth-coming. DMB (talk) 09:58, 17 November 2008 (UTC)

History section

I haved removed the following paragraph from the end of this section: In 2003, a team at MIT (Evan J. Reed, et al.) published their discovery of "Unexpected and stunning new physical phenomena..." surrounding photonic crystals. They found that applying shock waves to a photonic crystal will cause frequency shifts in light traveling through the crystal. Secondly, shock waves can be used to trap light within the shock front as it travels through the crystal. Finally, the shock waves can be used to efficiently manipulate the bandwidth of light.[10] Further research has been performed on the frequency shifting phenomena at the Chinese Academy of Sciences.[11]

I checked on web of science, and the search Topic=((shock wave*) AND (photonic* crystal*)) gives only 21 results, and only 19 since 2003. I am of the opinion that 3 papers per year does not represent a noteworthy enough milestone in the history of photonic crystals to be included here. If you disagree, please argue otherwise.

I am sure that this (and other interesting photonic crystal phenomena) could merit a section, maybe title "Interesting photonic crystal phenonema". DMB (talk) 08:18, 14 September 2010 (UTC)