Zobrazeno 1 - 10
of 207
pro vyhledávání: '"Sadreev, Almas"'
We perform optimization of Q-factor in the system of freestanding three/four/five/six coaxial subwavelength dielectric disks over all scales. Each parameter contributes almost one order of magnitude of the Q-factor due to multiple avoided crossings o
Externí odkaz:
http://arxiv.org/abs/2307.05937
Bound states in the continuum (BICs) in gratings composed of infinitely long silicon rods of rectangular cross-section are considered. We reveal merging off-$\Gamma$ Friedrich-Wintgen BIC with symmetry protected BIC. We present CMT and multipole deco
Externí odkaz:
http://arxiv.org/abs/2306.13313
Avoided crossing of resonances and merging multiple bound states in the continuum (BICs) are parallel means for tailoring the physical properties of BICs. Herein, we introduce a new concept of super quasi-BIC for photonic crystal (PhC) systems where
Externí odkaz:
http://arxiv.org/abs/2211.03675
We consider dielectric cavities whose radiation space is restricted by two parallel metallic planes. The TM solutions of the Maxwell equations of the system are equivalent to the solutions of periodical arrays of dielectric cavities. The system readi
Externí odkaz:
http://arxiv.org/abs/2208.01733
We consider square and equilateral triangular open acoustic resonators with the $C_{4v}$ and $C_{3v}$ symmetries, respectively. There is an unique property of square and triangular resonators of accidental number four-fold degeneracy of eigenstates t
Externí odkaz:
http://arxiv.org/abs/2207.14162
Autor:
Huang, Lujun, Jia, Bin, Pilipchuk, Artem S, Chiang, Yankei, Huang, Sibo, Li, Junfei, Shen, Chen, Bulgakov, Evgeny N, Deng, Fu, Powell, David A, Cummer, Steven A, Li, Yong, Sadreev, Almas F, Miroshnichenko, Andrey E
Bound states in the continuum (BICs) provide a viable way of achieving high-Q resonances in both photonics and acoustics. In this work, we proposed a general method of constructing Friedrich-Wintgen (FW) BICs and accidental BICs in a coupled acoustic
Externí odkaz:
http://arxiv.org/abs/2208.01396
Evolution of resonant frequencies and resonant modes as dependent on the aspect ratio is considered in a dielectric high index spheroid. Because of rotational symmetry of the spheroid the solutions are separated by the azimuthal index $m$. By the two
Externí odkaz:
http://arxiv.org/abs/2107.13719
Publikováno v:
Phys. Rev. A 103, 051501 (2021)
High index dielectric spherical particle supports the high-$Q$ resonant Mie modes that results in a regular series of sharp resonances in the radiation pressure. A presence of perfectly conducting metal surface transforms the Mie modes into the extre
Externí odkaz:
http://arxiv.org/abs/2103.14219
Autor:
Sadreev, Almas F.
I review the four mechanisms of bound states in the continuum (BICs) in application to microwave and acoustic cavities open to directional waveguides. The most simple are the symmetry protected BICs which are localized inside the cavity because of th
Externí odkaz:
http://arxiv.org/abs/2011.01221
Publikováno v:
Phys. Rev. A 102, 043518 (2020)
Optical coupling of two identical dielectric particles gives rise to bonding and anti-bonding resonances. The latter is featured by significant narrowing of the resonant width and strong enhancement of the $Q$ factor for the high index micron size pa
Externí odkaz:
http://arxiv.org/abs/2008.05360