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Nonreciprocal photonic crystal circuits.

Wang, Zheng.

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Nonreciprocal photonic crystal circuits.

紀錄類型:	書目-語言資料,印刷品 : Monograph/item
正題名/作者:	Nonreciprocal photonic crystal circuits./
作者:	Wang, Zheng.
面頁冊數:	113 p.
附註:	Adviser: Shanhui Fan.
Contained By:	Dissertation Abstracts International67-03B.
標題:	Physics, Electricity and Magnetism. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3209025
ISBN:	9780542571565

Nonreciprocal photonic crystal circuits.
Wang, Zheng.

Nonreciprocal photonic crystal circuits. - 113 p.

Adviser: Shanhui Fan.

Thesis (Ph.D.)--Stanford University, 2006.

Chip-level integration of nonreciprocal devices is important for large-scale optical information processing. Here, we discuss a systematic approach for the design of integrated nonreciprocal circuits by introducing gyrotropic materials into photonic crystals. We begin with an analysis of a single-wavelength-scale optical circulator formed of a magneto-optical resonator, a point photonic-crystal defect infiltrated with magneto-optical materials. In this circulator, numerical simulations with finite-difference time-domain methods demonstrate an isolation ratio greater than 40dB over a bandwidth of hundreds of GHz. The key to obtaining large nonreciprocity in photonic circuits is to design the spatial arrangement of the magnetic domains closely following the modal cross product between the electric fields. In addition, we demonstrate that time-reversal symmetry breaking can be used to mitigate some of the effects of the fabrication-related disorders. Specifically, surface roughness can be well tolerated in photonic crystal channel add/drop filters, which are particularly prone to structural disorders. And finally, the principle of magnetic domain optimization is further applied in photonic crystal waveguides. We discuss the influence of the modal profiles on the upper bound of the nonreciprocal phase shift.

ISBN: 9780542571565Subjects--Topical Terms:

1019535
Physics, Electricity and Magnetism.

Nonreciprocal photonic crystal circuits.
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520 $a Chip-level integration of nonreciprocal devices is important for large-scale optical information processing. Here, we discuss a systematic approach for the design of integrated nonreciprocal circuits by introducing gyrotropic materials into photonic crystals. We begin with an analysis of a single-wavelength-scale optical circulator formed of a magneto-optical resonator, a point photonic-crystal defect infiltrated with magneto-optical materials. In this circulator, numerical simulations with finite-difference time-domain methods demonstrate an isolation ratio greater than 40dB over a bandwidth of hundreds of GHz. The key to obtaining large nonreciprocity in photonic circuits is to design the spatial arrangement of the magnetic domains closely following the modal cross product between the electric fields. In addition, we demonstrate that time-reversal symmetry breaking can be used to mitigate some of the effects of the fabrication-related disorders. Specifically, surface roughness can be well tolerated in photonic crystal channel add/drop filters, which are particularly prone to structural disorders. And finally, the principle of magnetic domain optimization is further applied in photonic crystal waveguides. We discuss the influence of the modal profiles on the upper bound of the nonreciprocal phase shift.
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