РОССИЙСКАЯ АКАДЕМИЯ НАУК

УРАЛЬСКОЕ ОТДЕЛЕНИЕ

ИНСТИТУТ ХИМИИ TBEPДОГО ТЕЛА
   
| | | | |
| | | |
 27.04.2006   Карта сайта     Language По-русски По-английски
Новые материалы
Экология
Электротехника и обработка материалов
Медицина
Статистика публикаци


27.04.2006

Nature 440, 1166-1169 (27 April 2006) | doi:10.1038/nature04722; Received 14 November 2005; ; Accepted 9 March 2006


Wave and defect dynamics in nonlinear photonic quasicrystals


Barak Freedman1, Guy Bartal1, Mordechai Segev1, Ron Lifshitz2, Demetrios N. Christodoulides3 and Jason W. Fleischer4,5



Quasicrystals are unique structures with long-range order but no periodicity. Their properties have intrigued scientists ever since their discovery1 and initial theoretical analysis2, 3. The lack of periodicity excludes the possibility of describing quasicrystal structures with well-established analytical tools, including common notions like Brillouin zones and Bloch's theorem. New and unique features such as fractal-like band structures4, 5, 6, 7 and 'phason' degrees of freedom8 are introduced. In general, it is very difficult to directly observe the evolution of electronic waves in solid-state atomic quasicrystals, or the dynamics of the structure itself. Here we use optical induction9, 10, 11 to create two-dimensional photonic quasicrystals, whose macroscopic nature allows us to explore wave transport phenomena. We demonstrate that light launched at different quasicrystal sites travels through the lattice in a way equivalent to quantum tunnelling of electrons in a quasiperiodic potential. At high intensity, lattice solitons are formed. Finally, we directly observe dislocation dynamics when crystal sites are allowed to interact with each other. Our experimental results apply not only to photonics, but also to other quasiperiodic systems such as matter waves in quasiperiodic traps12, generic pattern-forming systems as in parametrically excited surface waves13, liquid quasicrystals14, and the more familiar atomic quasicrystals.






  1. Physics Department and Solid State Institute, Technion–Israel Institute of Technology, Haifa 32000, Israel
  2. School of Physics & Astronomy, Tel Aviv University, Tel Aviv 69978, Israel
  3. College of Optics and Photonics, University of Central Florida, Florida 32816-2700, USA
  4. Electrical Engineering Department,
  5. Princeton Institute for the Science and Technology of Materials, Princeton University, New Jersey 08544, USA


Correspondence to: Jason W. Fleischer4,5 Correspondence and requests for materials should be addressed to M.S. (Email: msegev@techunix.technion.ac.il).



Дизайн и программирование N-Studio 
А Б В Г Д Е Ё Ж З И Й К Л М Н О П Р С Т У Ф Х Ц Ч Ш Щ Ъ Ы Ь Э Ю Я
  • Chen Wev .  honorary member of ISSC science council

  • Harton Vladislav Vadim  honorary member of ISSC science council

  • Lichtenstain Alexandr Iosif  honorary member of ISSC science council

  • Novikov Dimirtii Leonid  honorary member of ISSC science council

  • Yakushev Mikhail Vasilii  honorary member of ISSC science council

  • © 2004-2019 ИХТТ УрО РАН
    беременность, мода, красота, здоровье, диеты, женский журнал, здоровье детей, здоровье ребенка, красота и здоровье, жизнь и здоровье, секреты красоты, воспитание ребенка рождение ребенка,пол ребенка,воспитание ребенка,ребенок дошкольного возраста, дети дошкольного возраста,грудной ребенок,обучение ребенка,родить ребенка,загадки для детей,здоровье ребенка,зачатие ребенка,второй ребенок,определение пола ребенка,будущий ребенок медицина, клиники и больницы, болезни, врач, лечение, доктор, наркология, спид, вич, алкоголизм православные знакомства, православный сайт творчeства, православные рассказы, плохие мысли, православные психологи рождение ребенка,пол ребенка,воспитание ребенка,ребенок дошкольного возраста, дети дошкольного возраста,грудной ребенок,обучение ребенка,родить ребенка,загадки для детей,здоровье ребенка,зачатие ребенка,второй ребенок,определение пола ребенка,будущий ребенок