Abstract: The present invention is based on a two-dimensional photonic crystal where are inserted defects that originate two waveguides and one resonant cavity. An electromagnetic signal that crosses the device is confined in the interior of the defects, due to the photonic band gap associated with the periodic structure that surrounds it. Its main function is the control of the flux of an electromagnetic signal over a communication channel, blocking (state off) or allowing (state on) the passage of the signal. It also promotes the change in the propagation direction of an electromagnetic signal by an angle of 120 degrees, providing greater flexibility in the design of integrated optical systems. The working principle of the device is based on the excitation of dipole modes in its resonant cavity, accordingly to the application of an external DC magnetic field on the magneto-optical material that constitutes it. In states on and off the magneto-optical material is magnetized and nonmagnetized, respectively.
Type:
Grant
Filed:
May 22, 2015
Date of Patent:
June 25, 2019
Assignee:
UNIVERSIDADE FEDERAL DO PARA—UFPA
Inventors:
Victor Dmitriev, Gianni Masaki Tanaka Portela, Raphael Rafsandjani Batista
Abstract: A two-dimensional photonic crystal formed of a square lattice of dielectric rods immersed in air, in which are inserted, in a controlled manner, defects that originate three waveguides and one resonant cavity. The cavity is formed of a ferrite cylinder with magneto-optical properties, and by two dielectric cylinders located near to the ferrite cylinder. It has the function of transmitting electromagnetic signals in a desired direction (clockwise or counterclockwise), defined by the sign of an external DC magnetic field H0.
Type:
Grant
Filed:
April 29, 2016
Date of Patent:
January 1, 2019
Assignee:
UNIVERSIDADE FEDERAL DO PARÁ—UFPA
Inventors:
Victor Dmitriev, Gianni Masaki Tanaka Portela, Leno Rodrigues Martins
Abstract: The present invention is based on a two-dimensional photonic crystal in which are inserted, in a controlled manner, defects that originate the waveguides and the resonant cavity that integrate the device. Its main function is to provide the control of the passage of an electromagnetic signal over a communications channel, blocking (state off) or allowing (state on) the passage of the signal. It also has the function of changing the propagation direction of an electromagnetic signal by an angle of 60 degrees, offering greater flexibility in the design of integrated optical systems. The operating principle of the device is associated with the excitation of dipole modes in the resonant cavity, which is based on a magneto-optical material.
Type:
Grant
Filed:
May 22, 2015
Date of Patent:
October 3, 2017
Assignee:
UNIVERSIDADE FEDERAL DO PARA—UFPA
Inventors:
Victor Dmitriev, Gianni Masaki Tanaka Portela, Raphael Rafsandjani Batista
Abstract: The present invention is based on a two-dimensional photonic crystal in which defects are inserted in a controlled manner, has the main function of division of the power of an input signal, excited in one of its six waveguides, among other three waveguides (output ones), while keeping isolation of the input port by means of two other waveguides. The operating principle of the device is based on the alignment of a dipole mode excited in the resonant cavity, in such a way that the nodes of this mode are oriented in the direction of two waveguides, so that these waveguides are not excited. Due to this alignment, each of the three output waveguides receive about one third of the power of input signal. The orientation of dipole mode is controlled by the applied DC magnetic field and the physical and geometrical parameters of the resonator.
Type:
Grant
Filed:
June 26, 2014
Date of Patent:
October 3, 2017
Assignee:
UNIVERSIDADE FEDERAL DO PARA—UFPA
Inventors:
Victor Dmitriev, Gianni Masaki Tanaka Portela