Photonic Definition and 56 Threads

I'm a fantasy writer and I am twisting and almost bending science in my story. I see no harm in it, and if you agree, I would like to ask for help. I'm writing a fantasy novel where the protagonist must battle an army of strange creatures. I say strange because these creatures are made of...

My source is below: https://scitechdaily.com/harvard-mit-scientists-create-never-seen-form-matter/ In short, using rubidium atoms, photon particles (as in laser form) are bound together to form a massless molecule.. or acting like a molecule, but with a bonding structure nonetheless. Here is...

Summary:: I want to create a superhero made of photonic molecules. I was wondering if anyone would give me some scientific pointers/advice. My premise is that a brilliant quantum computer scientist finds a way to create programmable photon molecules. Since he can program the molecules to have...

Can an AI one day create a living thing made of different photonic molecules? If it is remotely possible, I would like to know what kind of technological advancement had been made toward that. Thanks.

is it possible, i mean can we hold it at a certain distance we want ?

Hi ! I am actually seeking help regarding working principle of microwave based photonic filters from basics, I have tried a lot I did find allot of material but non of them were describing the basic working principle. Helping in this regard will be highly appreciable. Regards

If photons can be measured on quantum state levels then teleported and entangled, as done in photonic networking with NV centers, can entire electric fields also be measured, teleported, reconstructed and entangled as the ensembles of photons they are ?If so, can the electric fields of NEURONS...

If instead of electrons, which are spin 1/2 particles, we could use photons, which are spin 1, could we use this fact to have a three valued logic (1,0,-1) ? How to store photons like in an electronic computer to build the memory ? Are there techniques that allow that ? Thanks.

For a highly relativistic rocket powered by an external laser such that the thrust is 2*Power/c, the efficiency is dismal at the start when v is low yet approaches 100% as v approaches c. I take efficiency to mean the ability to convert the energy of the beam into usable kinetic energy. Does the...

Why do some photonic crystals show metamaterial property?

hi, I'm currently talking about light, and I'm trying to find out if there is a material or a method that can flip a polariser's polarisation... ie, if i apply a current, then this crystal changed from a clockwize polariser to an anti-clockwize polariser, and it is either a plastic or elastic...

Hello! I know how to calculate band structure and density of states of photonic crystal (example is pic.1) Does anybody know how to plot such DOS maps? The second picture is from the article about photonic crystal fibers by Rodrigo Amezcua.

Hi friends, this is my third post of my curiosity. :woot: First of all a photonic vacuum (as defined by me) is a region of space where there doesn't exist any type of photons or EM radiations ( those too which are beyond the detection of our present tech... i.e. including each and every...

lets say someone had an idea for a fully optical computer; that had a optical cubic processor, that refracted and reflected signals. into a optical "motherboard" (except it was not a flat board, more of a rectangle), how would one go about writing a language for such a thing (lets say a base 8...

Hi everyone:) Is there anyone who has worked on the phenomena near the band edge of photonic crystals? for example spontaneous emission near the band edge? there are lots of articles specially from Sajeev John " spontaneous emission near the edge of a photonic band gap" Phys.Rev.A vol50 num 2...

I'm a beginner in quantum optics. I always become confusing when the material's refractive index is complex. This time is about the photonic density of states. We know that if the material is not absorbing or dissipative, meaning the refractive index is a real number, the local photonic density...

Hi Everyone: I think some of you who familiar with quantum-optics know that the local photonic density of state can be calculated by the imaginary part of electromagnetic Green's function. The Green's function can be further presented by the dipole's mode pattern as G =...

Hi I am doing my Masters by research in Photonic Crystals and I want to do a PhD later as I dream of an academic. I wanted to know to if the field of photonic crystals offers opportunities for growth in the future. Will this field be actively researched in the future? Thanks

Hi Can you recommend me a simple to begin with book on Photoinc Crystals. I did my undergrad in Electronics Engineering and don't have any knowledge of photonics. Thanks

I wish you a happy new year 2014 full of discoveries, surprises, changes, laughter, smiles, giggles and tenderness Is if possible to Study the phonon transport in photonic crystals.

I 'm thinking to study about photonic and optical science, I always like the property of light and I want to study at the university Arizona. I want to know what is the good and bad side of this career because I am deciding, am I choosing a right career? Thanks.

I use transfer matrix method. I try to plot the phase Φ(ω) versus frequency ω graph in the vicinity of a band gap. The transmission coefficient t(ω) is t(ω) = |t(ω)|*exp(i*Φ(ω)) from which I get the transmission phase Φ(ω) = atan(t_imaginary(ω)/t_real(ω)). Since I assume that -pi/2 ≦ Φ ≦...

Beforehand, please excuse my ignorance in this field, as I am only beginning to delve into its astounding depths. So, as I understand it, Photons are the force carrier particles (gauge bosons) for the electromagnetic interaction (electromagnetic force). This given, one could pretty much say...

Homework Statement I'm implementing the transfer matrix method (manually) for an EM wave through a 1D layered structure. Basically I'm just considering a plane wave in the positive-x direction, conserving E and H across each material interface, and constructing interface matrices, the...

Recently learned about Special Relativity, so my brain is running perpetual circles around itself asking questions. So, I figured I would come here and ask where could I find out more information about the Lorentz Factor being undefined at a luminal velocity? Or more basically, where do I...

Ok quick question if a photon of light bounced off of a spaceship (or anything really) that was traveling at light speed, would the photon double in speed? similar to if a tennis ball hits a racket that is stationary it will lose energy but if the racket is swung towards the ball it will rebound...

Hello I'm dbmorpher, We all know that if you travel at the speed of sound you achieve a sonic boom from the sound bouncing off the object. Since light behaves similarly to sound would there be such a thing as a "Photonic Boom"? If so is the reason physical beings cannot travel the speed of...

Need on urgent basis as to design supercell lattice of pcf

Hello forum, I have a question about photonic crystals. From Wikipedia: "photons (behaving as waves) propagate through this structure - or not - depending on their wavelength. Wavelengths of light that are allowed to travel are known as modes, and groups of allowed modes form bands...

I have one hollow core fiber, the core is around 20um, Numerical Aperture is 0.03. The spot size of Ti:Sapphire laser is around 2~2.5mm. So I used focal length 50mm. But only very few power can be achieved (6uw). I wonder the reason. Could someone please give me some suggestions?

Homework Statement "What is the relationship between the energy of a photon and its frequency" then "Qualitively graph photonic energy versus frequency. No values are required. The Slope does not need to be specific." Homework Equations we are given a graph with no values...

I've been posing this question to physicist folk for 10 years, mySpace 6 years ago, and here (don't know when, when I had an older account), and I see that others bring it up on occasion. I will refine it to meet current objections. You have a photonic drive spaceship. It has a (classical) mass...

Hello PF, I came across a fact that, tungsten, molybdenum and chromium all have 6 valence electrons. Now,if one uses Molybdenum and Chromium instead of tungsten in photonic crystals for TPV(Thermo PhotoVoltaics) does it mean: 1. All are capable of releasing equal number of photons...

How can I convert the voltge measured across a photodiode to light output or intensity or any other photonic unit? I am trying to measure the light intensity/output of some LEDs using a photodiode but the photodiode measures voltage as a function of light intensity.

Researchers have for the first time managed to create a Bose-Einstein Condensate from photons: http://www.nature.com/news/2010/101124/full/news.2010.630.html What possibilities then arise from such a creation? What practical applications can be made from this work? I'd really like to know...

Hi all, I'm currently trying to learn more about photonic band gaps. The material I am looking at is an FCC crystal of spheres with an (111) surface, and this structure is theoretically predicted to display an incomplete band gap from the gamma to L points. (Please see attachment)...

Ignoring what we know. I was curious as to if anyone had overlayed all of the spectrum's of light on top of each other in a complete photonic view like the CMBR version, only with a much more varied scale, that being the entire light spectrum. And if so what did this produce? I only ask because...

Hi, I research on photonic crystals.I want to compute resonance frequency for single cylinder scattering. I use the below expression : J'(nkr)H(kr)-J(nkr)H'(kr)=0 J:bessel and H:hankel function. but I can't achieve correct result by write program in Matlab for computing that. Can you help me ?

Hi All, In quantum mechanics, related to photon, we have these two equations as valid ones: E = h x f p = h / lambda But we have in vacuum the dispersion relation c = lambda x f. 1) How these relations change when the dispersion relation change ? 2) Is it universally correct to...

Hello everyone, I am trying to understand COMSOL 3.5 and I am interested in Photonic crystal fibres and tapered optical fibres. First of all, could you please tell me what is the background of the layout? When you create a design/object, the rest area is air or I need to define another object as...

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...

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...

Need info on "Photonic Computers" Any info would be GREAT (especially explaining their difference to Quantum and Regular computing)