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WO2004006009A1 - Dispositif optique logique et procedure de generation d'un signal optique logique - Google Patents

Dispositif optique logique et procedure de generation d'un signal optique logique Download PDF

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Publication number
WO2004006009A1
WO2004006009A1 PCT/IB2003/002482 IB0302482W WO2004006009A1 WO 2004006009 A1 WO2004006009 A1 WO 2004006009A1 IB 0302482 W IB0302482 W IB 0302482W WO 2004006009 A1 WO2004006009 A1 WO 2004006009A1
Authority
WO
WIPO (PCT)
Prior art keywords
logical
electric field
optical
molecules
molecule
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/IB2003/002482
Other languages
English (en)
Inventor
Maurizio Crippa
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SANTOPIETRO GUISEPPE
Original Assignee
SANTOPIETRO GUISEPPE
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by SANTOPIETRO GUISEPPE filed Critical SANTOPIETRO GUISEPPE
Priority to AU2003239259A priority Critical patent/AU2003239259A1/en
Publication of WO2004006009A1 publication Critical patent/WO2004006009A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices 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
    • G02F1/35—Non-linear optics
    • G02F1/355—Non-linear optics characterised by the materials used
    • G02F1/361—Organic materials
    • G02F1/3615—Organic materials containing polymers
    • G02F1/3616—Organic materials containing polymers having the non-linear optical group in the main chain
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices 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
    • G02F1/35—Non-linear optics
    • G02F1/3515—All-optical modulation, gating, switching, e.g. control of a light beam by another light beam
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F3/00—Optical logic elements; Optical bistable devices

Definitions

  • the present invention relates to a logical optical device, as well as to a procedure for generating a logical optical signal .
  • a logical port is a device capable of switching into one or more physical statuses based on an external pulse ⁇ , which for simplicity of the discussion we shall call gate signal, or simply gate.
  • the variation of the refractive index perturbs the path of another light pulsing beam ⁇ with wavelength ⁇ , such that ⁇ ⁇ ⁇ ' and ⁇ ⁇ ⁇ ' . More in particular, the variation of the refractive index can be obtained using the Pockels effect, the Kerr effect and the effect of optical bi-refraction on molecules exhibiting a non-linear optical activity (NLO) of the second and third order .
  • NLO non-linear optical activity
  • ⁇ (2) is second order polarisation
  • ⁇ (3) is third order polarisation
  • ⁇ is first order molecular polarisation
  • ⁇ is second order molecular polarisation
  • ⁇ is third order molecular polarisation.
  • the Pockels, Kerr and optical bi-refraction effects occur if the NLO molecules are immersed in an electrical field such as, for example, that generated in a Mach-Zender device, rather than by a separation of charges photo- generated in a photo-refractive material. From the discussion above it is evident that in order to obtain effects changing the refractive index it is necessary to introduce the molecules in an electric field, for example in a Mach-Zender device, or in any case to set up complex operating conditions to obtain the generation of the electric field.
  • object of the present invention is that of solving the problems mentioned above by realising a logical optical device which should work without requiring further elements for the generation of the electric field.
  • Another object of the present invention is that of realising a logical optical device which should be connected in series to other similar optical devices.
  • a further object of the present invention is that of realising a logical optical device which should be connected to other similar optical devices to form logical ports or complex logical circuits.
  • a further object of the present invention is that of realising a logical optical device which should be connected to other similar optical devices to form substantially planar and multilayer configurations.
  • the claimed invention also comprises a procedure for generating a logical optical signal.
  • Figure 1 is a schematic view of an exemplificative embodiment of the logical optical device according to the present invention
  • FIG. 2 is a schematic view illustrating the operation of the present invention
  • Figure 3 is a schematic view of another preferred embodiment of the invention.
  • Figure 4 is a schematic view of yet another preferred embodiment of the invention.
  • FIG. 5 shows an example of molecule intended to generate the electric field according to the teachings of the invention
  • Figure 7 shows a molecular example of the invention according to the diagram of Figure 1;
  • Device 10 consists of two molecules intended to generate the electric field (CG) , indicated with reference numeral 11, where the above molecules 11 are connected in series to a third molecule provided with non-linear optical properties (NLO) , in turn indicated with reference numeral 12.
  • the molecules intended to generate the electric field are characterised in that they exhibit a separate-charge orbital representation of the excited state or fundamental status.
  • the electric field is generated by the separation of charges produced or annulled by the passage to the excited state (HOMO ? LUMO) , caused by the absorption of the gate, in molecules connected in an ordered manner with the NLO molecule, as in Figure 1.
  • Figure 5 illustrates an example of molecule intended to generate the electric field (CG) .
  • Figure 6 illustrates an example of molecule exhibiting a non-linear optical effect (NLO)
  • Figure 7 illustrates a molecular example of the invention according to the diagram of Figure 1.
  • the gate consists of a light pulsing beam ⁇ ' and consequent wavelength ⁇ ' .
  • the variation of the refractive index perturbs the path of another light pulsing beam ⁇ and consequent wavelength ⁇ , such that ⁇ ⁇ ⁇ ' and ⁇ ⁇ ⁇ ' .
  • This other light beam where the device suitably inserted in the proper configuration, such as for example the typical configuration of a Mach-Zender, acts as signal.
  • the device of the invention can work as a logical port NOT, without for this reason limiting the invention described for this use.
  • the ordered system as represented in Figure 1, can be dispersed or anchored to a polymer transparent to radiations ⁇ and ⁇ ' .
  • the different molecules can be differently connected in order to obtain a polymer consisting of the same molecules, as shown in Figure 3.
  • the different molecules can be anchored to a surface and form a SAM (Self Assembling Multilayers), as shown in Figure 4.
  • the inventive concepts described also allow the definition of a procedure for generating a logical optical signal.
  • the procedure at least comprises the step of connecting two molecules intended to generate the electric field to a third molecule provided with non-linear optical properties, and the step of using a first light beam as optical gate signal for generating such electric field as to change the optical properties of the above third molecule with non-linear optics, so as to perturb the path of a second light beam acting as logical signal.

Landscapes

  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Optical Modulation, Optical Deflection, Nonlinear Optics, Optical Demodulation, Optical Logic Elements (AREA)

Abstract

La présente invention se rapporte à un dispositif optique logique comportant au moins deux molécules (11) conçues pour générer le champ électrique, et reliées à une troisième molécule (12) dotée de caractéristiques optiques non linéaires. Un premier faisceau jouant le rôle de signal de porte logique génère un champ électrique permettant de modifier les caractéristiques optiques de la troisième molécule afin de perturber le trajet d'un second faisceau lumineux jouant le rôle de signal logique. L'invention se rapporte également à une procédure de génération d'un signal optique logique.
PCT/IB2003/002482 2002-07-02 2003-06-26 Dispositif optique logique et procedure de generation d'un signal optique logique Ceased WO2004006009A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2003239259A AU2003239259A1 (en) 2002-07-02 2003-06-26 Logical optical device and procedure for generating a logical optical signal

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT2002MI001456A ITMI20021456A1 (it) 2002-07-02 2002-07-02 Dispositivo logico ottico e procedimento per la generazione di un segnale logico ottico
ITMI2002A001456 2002-07-02

Publications (1)

Publication Number Publication Date
WO2004006009A1 true WO2004006009A1 (fr) 2004-01-15

Family

ID=11450128

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2003/002482 Ceased WO2004006009A1 (fr) 2002-07-02 2003-06-26 Dispositif optique logique et procedure de generation d'un signal optique logique

Country Status (3)

Country Link
AU (1) AU2003239259A1 (fr)
IT (1) ITMI20021456A1 (fr)
WO (1) WO2004006009A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0482920A2 (fr) * 1990-10-24 1992-04-29 Kabushiki Kaisha Toshiba Composant optique organique
US5156774A (en) * 1989-02-22 1992-10-20 Flamel Technologies Thiophene-related compounds active in nonlinear optics, materials and devices containing them
US5670090A (en) * 1993-08-05 1997-09-23 California Institute Of Technology Nonlinear optical materials with reduced aromaticity and bond length alternation

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5156774A (en) * 1989-02-22 1992-10-20 Flamel Technologies Thiophene-related compounds active in nonlinear optics, materials and devices containing them
EP0482920A2 (fr) * 1990-10-24 1992-04-29 Kabushiki Kaisha Toshiba Composant optique organique
US5670090A (en) * 1993-08-05 1997-09-23 California Institute Of Technology Nonlinear optical materials with reduced aromaticity and bond length alternation

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
BELFIELD K D ET AL: "Synthesis of polyurethanes and polyimides for photorefractive applications", POLYMER, ELSEVIER SCIENCE PUBLISHERS B.V, GB, vol. 41, no. 13, June 2000 (2000-06-01), pages 5011 - 5020, XP004190974, ISSN: 0032-3861 *
YU LUPING ET AL: "Photorefractive polymers. 2. Structure design and property characterization", MACROMOLECULES;MACROMOLECULES APR 26 1993 PUBL BY ACS, WASHINGTON, DC, USA, vol. 26, no. 9, 26 April 1993 (1993-04-26), pages 2216 - 2221, XP002254992 *

Also Published As

Publication number Publication date
AU2003239259A1 (en) 2004-01-23
ITMI20021456A0 (it) 2002-07-02
ITMI20021456A1 (it) 2004-01-02

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