refractive index calculation

[varinder singh]

hello everyone………can anyone help me ……how to calculate the negative refractive index of a material?

[umer syed]

hi virender singh
negative refraction is not just because of negative permitivity and permeability, in some crystalls such as photonic crystals we also have negative refraction for some angles. and also chiral metameterials can have negative refraction.
When a negative index of refraction occurs, propagation of the electromagnetic wave is reversed. Resolution below the diffraction limit becomes possible. This is known as Subwavelength imaging.
for further information visit the link below;
http://infrared.ucsd.edu/basov_pubs/mt9-28-2006.pdf

with regards

[varinder singh]

thanks umer.
for this information……………..
with regards

[Ubaid Bhat]

hi verinder singh…..
Aasif abshir dar has already mentioned the various conditions for metamaterials and he has rightly said that when a negative index of refraction occurs, propagation of the electromagnetic wave is reversed.
i came across a link in which the negative refractive index material was discussed thoroughly and it’s calculations are also given. So for your reference i am attaching a link which you might find of some help.
http://emlab.utep.edu/ee5390em21.htm
hope you will get some help from this.
with regards
ubaid bhat

[SAHIL SINGH]

Hi virender singh,

I agree with Umer Syed here that negative refraction is not just because of negative permitivity and permeability..When a negative index of refraction occurs, propagation of the electromagnetic wave is reversed.Also try to see the comments of asif in the link mentioned by Ubaid Bhat… It will surely be of help…

with regards
Sahil Singh

[varinder singh]

hello everyone …..i shall be very thankful to all of you for sharing this important information with me….
i hope i will be able to calculate the negative refractive index
thanks once again
with regards

[Naazira Badar]

Hi Varinder Singh..

Here is a link which I suggest you should check. : https://optiwave.com/forums/topic/photonic-crystal-fiber-calculations/

Response has been provided by the tech support of optisystem itself. I hope that helps you.
All the best.

Regards
Naazira Badar.

[varinder singh]

helo……..naaazira
thanks for this information…..i hope i will be able to understand the negative refractive index in material…..

[varinder singh]

helu ubaid bhat .
thanks for sharing the link.
i was able to find the answer of my question……….thanks once again for such information
with regards varinder

[Naazira Badar]

Hi Varinder .

Welcome to this forum. I hope you are able to figure out your solution. All the best.

Regards
Naazira Badar.

[varinder singh]

thanks naazira,,,,,,,,,,
i hope i will be able to get information about the optical communications……once again thanks …….for your reply……………..
with regards

[Ranjeet Kumar]

Hi,
Negative index material (NIM) is also called a metamaterial where the refractive index for an electromagnetic wave can be determined and it has a negative value of refractive index over some frequency range.
For more details , i am sharing the links:
http://www.ncbi.nlm.nih.gov/pubmed/11292865
http://web.pdx.edu/~larosaa/Applied_Optics_464-564/Projects_Optics/Plasmons/2001_Experimental_Verification_of%20Negative_index_of_refraction.pdf
I think we can’t measure refractive index of materials in optisystem.

Seeking your response.

[varinder singh]

thanks ranjeet ,,,,,,,,,,,,,,,,,,,

[SAHIL SINGH]

Hi Ranjeet,

Are you sure we cant measure about the comment that we cant measure refaractive index of materials in optisystem ? Hope to hear from you soon on this topic..

Regards
Sahil Singh

[Ranjeet Kumar]

Hi SAHIL SINGH,
I think i am right because what i have learnt and read the optisystem software and its information datasheet. I didn’t find something relevant to the measurement of Refractive index of materials in optisystem.
Hope we will have an option to measure Refractive index of materials in near future.

[SAHIL SINGH]

Hi Ranjeet Kumar,

I actually had a bit of doubt about whether we can measure Refractive index of materials in the optisystem software.. So just wanted to clarify it… Thanks for the information…

Regards
Sahil Singh

[varinder singh]

hiiii…everybody…
thanks for sharing info with me…
i really appreciate .
with regards

[SAHIL SINGH]

Hi Virender,

You are welcome..

Regards
Sahil Singh

[varinder singh]

hii.. sahil.
itz my pleasure
with regards

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