What is a Light Line and Its Significance in Photonics - Explained

  • Thread starter Thread starter snickersnee
  • Start date Start date
  • Tags Tags
    Light Line
Click For Summary
A "light line" in photonics represents the boundary between propagating and non-propagating modes of light in a medium. It is derived from the relationship between frequency and wavevector, indicating whether a given mode can exist above or below this line. The significance of the light line lies in its ability to determine the conditions under which light can be guided or confined in photonic structures. Understanding this concept is essential for applications in photonics, such as waveguides and photonic crystals. Further exploration of the topic can enhance comprehension of its implications in the field.
snickersnee
Messages
30
Reaction score
0
What is a "light line"?

The graph pictured below contains a "light line." What does it signify? What equation did it come from? All I know is it's important if something is above or below the light line, but other than that I don't have a clue. I would appreciate any explanation. A web link would be great too.
The graph is on the 2nd page of this paper: http://www.stanford.edu/group/fan/publication/Fink-Science-282-1679-1998.pdf
The paper is just an example, the light line is not specific to this paper. It seems to be a standard tool in the photonics field.

http://snag.gy/hdeb3.jpg
 
Engineering news on Phys.org
The definition is given in the paper you linked.

246357


But I confess. That is pretty dense and I don't understand it myself.
 

Thread 'Electric power distribution from powerplant to homes'

I am trying to understand how transferring electric from the powerplant to my house is more effective using high voltage. The suggested explanation that the current is equal to the power supply divided by the voltage, and hence higher voltage leads to lower current and as a result to a lower power loss on the conductives is very confusing me. I know that the current is determined by the voltage and the resistance, and not by a power capability - which defines a limit to the allowable...
View full post »

Similar threads

What Do Vertical Lines in Signal Graphs Represent?
  • · Replies 2 ·
Replies
2
Views
4K
What actually happens when light meets a surface(QED or QM)?
  • · Replies 2 ·
Replies
2
Views
2K
Graduate In light of new evidence, what might be behind the Casimir Effect?
  • · Replies 46 ·
2
Replies
46
Views
5K
Where could I look for down-to-earth X-ray facts?
  • · Replies 4 ·
Replies
4
Views
2K
Graduate LQG Legend Writes Paper Claiming GR Explains Dark Matter Phenomena
  • · Replies 264 ·
9
Replies
264
Views
22K
What is the role of these elements in entanglement
  • · Replies 1 ·
Replies
1
Views
2K
Undergrad Some questions about Cosmic Microwave Background radiation
  • · Replies 13 ·
Replies
13
Views
6K
Undergrad Progress In Calculating The HLbL Contribution To Muon g-2
  • · Replies 0 ·
Replies
0
Views
2K
Homemade Quantum Eraser Experiment revisited with photos and full text
  • · Replies 13 ·
Replies
13
Views
7K
Eye of Ellipses: Photographing Magnetic Lines of Constant Scalar Potential
  • · Replies 18 ·
Replies
18
Views
18K