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1. WO2010006611 - ALL-OPTICAL CONTROL OF THZ RADIATION IN PARALLEL PLATE WAVEGUIDES

Publication Number WO/2010/006611
Publication Date 21.01.2010
International Application No. PCT/DK2009/050101
International Filing Date 30.04.2009
IPC
G02F 1/35 2006.01
GPHYSICS
02OPTICS
FDEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH IS MODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THE DEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY, COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g. SWITCHING, GATING, MODULATING OR DEMODULATING; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF; FREQUENCY-CHANGING; NON-LINEAR OPTICS; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
1Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
35Non-linear optics
CPC
B82Y 20/00
BPERFORMING OPERATIONS; TRANSPORTING
82NANOTECHNOLOGY
YSPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
20Nanooptics, e.g. quantum optics or photonic crystals
G02B 6/1225
GPHYSICS
02OPTICS
BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
6Light guides
10of the optical waveguide type
12of the integrated circuit kind
122Basic optical elements, e.g. light-guiding paths
1225comprising photonic band-gap structures or photonic lattices
G02B 6/13
GPHYSICS
02OPTICS
BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
6Light guides
10of the optical waveguide type
12of the integrated circuit kind
13Integrated optical circuits characterised by the manufacturing method
G02F 1/0126
GPHYSICS
02OPTICS
FDEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH IS MODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THE DEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY, COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g. SWITCHING, GATING, MODULATING OR DEMODULATING; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF; FREQUENCY-CHANGING; NON-LINEAR OPTICS; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
1Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating, or modulating; Non-linear optics
01for the control of the intensity, phase, polarisation or colour 
0126by another light beam, i.e. opto-optical modulation
G02F 1/353
GPHYSICS
02OPTICS
FDEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH IS MODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THE DEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY, COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g. SWITCHING, GATING, MODULATING OR DEMODULATING; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF; FREQUENCY-CHANGING; NON-LINEAR OPTICS; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
1Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating, or modulating; Non-linear optics
35Non-linear optics
353Frequency conversion, i.e. wherein a light beam with frequency components different from those of the incident light beams is generated
G02F 2203/13
GPHYSICS
02OPTICS
FDEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH IS MODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THE DEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY, COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g. SWITCHING, GATING, MODULATING OR DEMODULATING; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF; FREQUENCY-CHANGING; NON-LINEAR OPTICS; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
2203Function characteristic
13involving THZ radiation
Applicants
  • DANMARKS TEKNISKE UNIVERSITET [DK]/[DK] (AllExceptUS)
  • COOKE, David Gregory [CA]/[DK] (UsOnly)
Inventors
  • COOKE, David Gregory
Agents
  • PLOUGMANN & VINGTOFT A/S
Priority Data
08160432.415.07.2008EP
61/080,85415.07.2008US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) ALL-OPTICAL CONTROL OF THZ RADIATION IN PARALLEL PLATE WAVEGUIDES
(FR) COMMANDE TOUT OPTIQUE DU RAYONNEMENT TÉRAHERTZ DANS DES GUIDES D'ONDES À LAME À FACES PARALLÈLES
Abstract
(EN)
The invention relates to control of THz radiation in parallel plate waveguides (PPWG) by forming components in the waveguide by use of optical radiation pulses. Patterns of excited regions induced in the PPWG by an optical excitation pulses changes the electromagnetic properties of the waveguide medium in the THz regime, thereby forming transient passive and active components for controlling THz radiation signals. The excitation can be generation of free charge carriers in a semiconductor material in the PPWG, to create metallic regions that form mirrors, lenses or photonic crystal structures in the PPWG. The photo- induced pattern can be modulated in time in response to an incoming signal, to frequency-, phase- or amplitude-modulate the THz signal. The systems can be integrated on chip-scale components and can be applied in e.g. THz communication, digital computing, sensors, and lab-on-a-chip applications. The optical and THz radiation can be ultrashort pulses with picosecond or femtosecond pulse durations.
(FR)
L'invention porte sur une commande de rayonnement térahertz dans des guides d'ondes à lame à faces parallèles (PPWG) par la formation de composantes dans le guide d'ondes par utilisation d'impulsions de rayonnement optique. Des motifs des régions excitées induites dans le guide d'ondes à lame à faces parallèles par des impulsions d'excitation optique modifient les propriétés électromagnétiques du milieu du guide d'ondes dans le régime térahertz, formant par conséquent des composantes passives et actives transitoires pour contrôler les signaux de rayonnement térahertz. L'excitation peut être constituée par la génération de porteurs de charge libre dans un matériau semi-conducteur dans le guide d'ondes à lame à faces parallèles, pour créer des régions métalliques qui forment des miroirs, des lentilles ou des structures de cristal photonique dans le guide d'ondes à lame à faces parallèles. Le motif photo-induit peut être modulé en temps en réponse à un signal d'entrée, pour une modulation en fréquence, en phase ou en amplitude du signal térahertz. Les systèmes peuvent être intégrés sur des composants de puce et peuvent être appliqués dans, par exemple, la communication térahertz, le calcul numérique, les capteurs, les applications de laboratoire sur puce. Les rayonnements optique et térahertz peuvent être des impulsions ultracourtes avec des durées d'impulsion de l'ordre de la picoseconde ou de la femtoseconde.
Also published as
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