Shock-wave modulation and control of electromagnetic radiation
A device for converting frequency of electromagnetic radiation includes a nonlinear medium that forms a moving grating in the nonlinear medium by introducing at opposite ends of the nonlinear medium a first set of electromagnetic radiation having varying frequencies. Electromagnetic radiation is inputted into the nonlinear medium at a first frequency and extracted at a second frequency from the nonlinear medium. The moving grating in the nonlinear medium allows for electromagnetic radiation to be converted into the second frequency.
1. A method of modifying frequency of electromagnetic radiation input into a nonlinear medium comprising:
a) forming a moving grating in said nonlinear medium by introducing at opposite ends of said nonlinear medium a first set of electromagnetic radiation having varying frequencies;
b) inputting electromagnetic radiation into said nonlinear medium at a first frequency; and
c) extracting electromagnetic radiation at a second frequency from said nonlinear medium;
said moving grating in said nonlinear medium allowing for electromagnetic radiation to be modified into said second frequency.
2. The method of claim 1 , wherein said electromagnetic radiation is light.
3. The method of claim 1 , wherein said varying frequencies are chosen so that said first frequency coincides with a bandgap frequency region of the moving grating in said nonlinear medium.
4. The method of claim 1 , wherein said input electromagnetic radiation comprises an exponentially decaying spatial dependence into said nonlinear medium.
5. The method of claim 1 , wherein said input electromagnetic radiation is reflected from the moving grating and propagates away at said second frequency.
6. The method as per claim 1 , wherein said input electromagnetic radiation falls within one of the bandgaps of the moving grating.
7. The method of claim 1 , wherein said extracted electromagnetic radiation is phase matched with said inputted electromagnetic radiation for electromagnetic radiation of bandwidths below the bandgap size of said moving grating.
8. A method of converting frequency of electromagnetic radiation input into a nonlinear medium comprising:
a. forming a moving grating in said nonlinear medium by introducing at opposite ends of said nonlinear medium a first set of electromagnetic radiation having varying frequencies;
b. inputting electromagnetic radiation into said nonlinear medium at a first frequency; and
c. extracting electromagnetic radiation at a second frequency from said nonlinear medium;
said moving grating in said nonlinear medium allowing for electromagnetic radiation to be converted into said second frequency.
9. The method of claim 8 , wherein said electromagnetic radiation is light.
10. The method of claim 8 , wherein said varying frequencies are chosen so that said first frequency coincides with a bandgap frequency region of the moving grating in said nonlinear medium.
11. The method of claim 8 , wherein said input electromagnetic radiation comprises an exponentially decaying spatial dependence into said nonlinear medium.
12. The method of claim 8 , wherein said input electromagnetic radiation is reflected from the moving grating and propagates away at said second frequency.
13. The method as per claim 8 , wherein said input electromagnetic radiation falls within one of the bandgaps of the moving grating.
14. The method of claim 8 , wherein said extracted electromagnetic radiation is phase matched with said inputted electromagnetic radiation for electromagnetic radiation of bandwidths below the bandgap size of said moving grating.
15. A device for converting frequency of electromagnetic radiation comprising a nonlinear medium that forms a moving grating in said nonlinear medium by introducing at opposite ends of said nonlinear medium a first set of electromagnetic radiation having varying frequencies, electromagnetic radiation is inputted into said nonlinear medium at a first frequency and extracted at a second frequency from said nonlinear medium, said moving grating in said nonlinear medium allowing for electromagnetic radiation to be converted into said second frequency.
16. The device of claim 15 , wherein said electromagnetic radiation is light.
17. The device of claim 15 , wherein said varying frequencies are chosen so that said first frequency coincides with a bandgap frequency region of the moving grating in said nonlinear medium.
18. The device of claim 15 , wherein said input electromagnetic radiation comprises an exponentially decaying spatial dependence into said nonlinear medium.
19. The device of claim 15 , wherein said input electromagnetic radiation is reflected from the moving grating and propagates away at said second frequency.
20. The device of claim 15 , wherein said input electromagnetic radiation falls within one of the bandgaps of the moving grating.
21. The device of claim 15 , wherein said extracted electromagnetic radiation is phase matched with said inputted electromagnetic radiation for electromagnetic radiation of bandwidths below the bandgap size of said moving grating.