Photonics is the physical science and application of light (photon) generation, detection, and manipulation through emission, transmission, modulation, signal processing, switching, amplification, and sensing. Though covering all light's technical applications over the whole spectrum, most photonic applications are in the range of visible and near-infrared light. The term photonics developed as an outgrowth of the first practical semiconductor light emitters invented in the early 1960s and optical fibers developed in the 1970s.
Okay, I know that solar radiation from the sun is already a source of energy to be used as an alternative energy source for light, but solar energy is only one source of light. Scientists have already thought of applying photons as a source of current that would be used to carry out a myriad...
Hi,
I have this quite basic question regarding photonic crystals.
As I understand, a periodic dielectric structure (photonic crystal) has modes (spatial profiles) at discrete frequencies from:
\nabla \times \Big( \frac{1}{\epsilon(r)}\nabla \times H(r) \Big) = \frac{\omega^2}{c^2} H(r)...
Setup:
I'm trying to make the band structure for a planar photonic crystal with finite thickness, i.e., a quasi-3D problem.
I only want the x-direction band structure. So, I'm using variable floquet periodic BCs for the x-direction boundaries, and 0 degree floquet periodic BCs for the...
I've just read an article about IT with light instead of electrons:
http://focus.aps.org/story/v22/st15
I wonder, is there any indication that light processing will be faster than conventional electronics? Information transport is faster, but what about logic operations?
What would be...
Hello!
My name is Alexandru, i am from Romania student at Mechanics University. I am working on a project and i also try to confirm some theory'es. I recently developed build and test a mechanism using the inertial propulsion principle. It is working but keep it in test stage. Now the...
Hello, I'm a business major who has recently stumbled upon the interesting phenomena of photonic crystals. After reading numerous papers and websites on the topic; however, there are many things that go over my head since I have very little knowledge in physics. I'm hoping that someone with...
Homework Statement
one is powering a photonic rocket with photons. what is the speed it reaches when its mass is half its starting mass.
and per say you would start stoping then ... how would that look like (equations and sentences)
Homework Equations
invariance of the 4D vector of...
DARPA, NASA, JPL and various aerospace giants are rushing to learn more about a massless thruster developed by Dr Young Bae:
http://www.eetimes.com/news/latest/showArticle.jhtml?articleID=201804852
http://www.photonics.com/content/news/2007/September/7/88894.aspx
At the claimed...
Hi
Hi
Im undergrad physics hoping to go into theoretical or mathematical physics. The course Photonics II clashes with one of my math courses Fields and Geometry III and I am told by my course advisor it isn't essential.
I don't mind doing missing a lecture a week of my maths course to...
I am trying to calculate a photonic crystal’s band structure for a very simply case of a 1-dimentional periodic medium, or rather I am trying to understand the calculations that I am looking at for this situation.
The end result of what I would like to do is get some function that I can graph...
Hi,
I would like good information about photonic crystals.
Does anyone know where to find this? I would like the text to begin at the basic concepts. The only Solid stat physics book i have is "Introduction to solid state physics" 7th Edition by Kittel and it doesn´t say much about this...
while I am most likely completely wrong I've got an idea...
while we all know force is...
F = dp/dt
and the momentum of a photon is p = hf/c
then wouldn't you create an acceleration if u had a flashlight that changed frequence(color) extremely quickly, yes i know the momentum would be so...
Having been reading a little about the concept of absolute time and how Einstiens theories ruled it out but at the same time established light as invariant to all observers as absolute.
If we built a clock that ticked at a rate determined by a beam of light would not that tick rate be an...
The photonic theory of everything.
Vern
I have as promised made an intensive visit to your web-site. What troubles me most is the lack of explanations for macro phenomenon as attributed to EM radiation. This is as follows :
(1) By observation we know that EM radiation decreases in...
Hi,
Can someone tell me how a wave is guided (in a fiber for instance) thinking
in term of diffraction (or scattering) and not in term of successive
reflections.
And my second question is : would it be possible to "extrude" a plan
diffractive element in a fiber to guide wave and have the...
The most abundant form of free energy is the photon.
The energy of a photon can range from virtually nothing up to about a Joule (see Planck). It provides us with heat - infra-red, light, even fast food - microwave.
The photon's half-life is somewhere in the region of 6.5 billion years...