Andrea Alu

20080212920, Sep 4, 2008

Jun 20, 2005

11/629746

Nader Engheta - Berwyn PA, US
Alessandro Salandrino - Rome, IT
Andrea Alu - Philadelphia PA, US

The Trustees of the University of Pennsylvania - Philadelphia PA

G02B 6/12

385 14

Circuits and circuit elements adapted to function at optical or infrared frequencies are made from plasmonic and/or nonplasmonic particles disposed on a substrate, where the plasmonic and nonplasmonic particles have respective dimensions substantially smaller than a wavelength of an applied optical or infrared signal. Such particles are deposited on a substrate in a variety of shapes and sizes from a variety of plasmonic and/or nonplasmonic materials so as to form resistors, capacitors, inductors and circuits made from combinations of these elements.

20190372190, Dec 5, 2019

Sep 13, 2017

16/332077

- Austin TX, US
Andrea Alu - New York NY, US
Dimitrios Sounas - Detroit MI, US

H01P 1/36
H03H 11/04
H03H 7/38
H03H 7/42
H01P 1/38

A magnet-free non-reciprocal device realized using modulated filters. The device includes one or more filters in one or more branches, where each branch connects two ports or a port and a central node. The poles and zeros of each of the first, second and third filters are modulated in time such that degenerate modes at each pole and zero is split thereby destructively interfering at one or more output ports and adding up at another output port allowing non-reciprocal transmission, isolation and/or non-reciprocal phase shift. The device is able to realize a magnet-free full-duplex communication scheme implementing a magnet-free circulator for radio frequency cancellation or a magnet-free isolator or gyrator.

20180138889, May 17, 2018

Nov 14, 2017

15/812296

- Boston MA, US
- Austin TX, US
Andrea ALU - Austin TX, US
Dimitrios SOUNAS - Austin TX, US
Ahmed KORD - Austin TX, US

H03H 9/24
H01P 1/397
H03H 9/58
H01P 1/20
H01P 1/36
H03H 7/52

A microelectromechanical resonant circulator device is providing, having a substrate, and at least three electrical ports supported on the substrate. At least three electromechanical resonator elements are connected with associated switch elements and an associated port. The switch elements are operative to provide commutation over time of the electromechanical resonator elements.

20170097558, Apr 6, 2017

Jul 30, 2015

14/814176

- Austin TX, US
Andrea Alu - Austin TX, US
Jongwon Lee - Austin TX, US
Mykhailo Tymchenko - Austin TX, US

G02F 1/355
G02F 1/017
G02F 1/35

A nonlinear metasurface structure including a multi-quantum-well layer designed for a nonlinear response for a desired nonlinear optical process and an array of nanoantennas coupled to the intersubband transitions of the multi-quantum-well layer. Each nanoantenna in the array is designed to have electromagnetic resonances at or close to all input and output frequencies of a given nonlinear optical process. Nanoantennas allow efficient coupling of any incident and outgoing light polarizations to intersubband transitions. Nanoantennas may further provide significant field enhancement in the multi-quantum-well layer. As a result, the nonlinear metasurface structure can be designed to produce a highly nonlinear response for any polarization and angle of incidence of incoming and outgoing waves in a nonlinear optical process. Due to their very larger nonlinear response, efficient frequency conversion can be produced in these metasurfaces without the stringent phase-matching constraints of bulk nonlinear crystals.

20160093760, Mar 31, 2016

May 21, 2013

14/892156

- London, GB
- Austin TX, US
Andrea Alu - Austin TX, US
Christos Argyropoulos - Austin TX, US

H01L 31/054
G02B 6/10
G02B 6/122

There is provided an optical waveguide comprising: a periodic component comprising a plurality of material elements () arranged to receive radiation; and a plurality of tapered waveguides (), wherein each material element is respectively coupled to a tapered waveguide which tapers outwardly from the material element. The device works as a broadband absorber.