# US 5,348,687 A · M41S materials having nonlinear optical properties

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- Number: US 5,348,687 A
- Document ID: US5348687A
- Status: Granted
- Kind: A
- Application number: 08/157,549
- Filed: 1993-11-26
- Granted: 1994-09-20
- Earliest claimed: 1993-11-26
- Assignees: Mobil Oil Corporation
- Inventors: Jeffrey S. Beck; Guenter H. Kuehl; David H. Olson; John L. Schlenker; Galen D. Stucky; James C. Vartuli
- Web page: https://patentgrep.com/patent/US5348687A

## CPC

- G02F 1/3556: {Semiconductor materials, e.g. quantum wells}
- B82Y 20/00: Nanooptics, e.g. quantum optics or photonic crystals
- 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
- B82Y: SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES

## Abstract

A material exhibiting third order nonlinear optic properties includes quantum size clusters of semiconducting guest material incorporated into the pores of M41S material in an arrangement to provide nonlinear optic properties. A material exhibiting second order nonlinear optic properties includes an organic guest material incorporated into the pores of M41S material so that a non-centrosymmetric structure is formed which will provide second harmonic generation when subjected to electromagnetic radiation of a selected frequency.

## Claims

### Claim 1

A composition exhibiting third order nonlinear optical properties, comprising:
a host material comprising an inorganic, porous, non-layered crystalline phase material exhibiting, after calcination, an arrangement of uniformly sized pores adapted in size, shape and chemical stereospecificity to fix an inorganic, semiconducting guest material therein in an arrangement to provide nonlinear optical properties, said pores having diameters of at least about 13 Angstrom units, said phase material exhibiting an X-ray diffraction pattern with at least one peak at a position greater than about 18 Angstrom units d-spacing and exhibiting a benzene adsorption capacity of greater than about 15 grams benzene per 100 grams of said phase material at 50 torr and 25.degree. C., and
quantum size clusters of said guest material incorporated into the pores of said host material.

### Claim 2 (depends on 1)

A composition as described in claim 1 wherein said host material is a silicate having a hexagonal arrangement of uniformly sized pores and exhibiting, after calcination, a hexagonal electron diffraction pattern that can be indexed with a d.sub.100 value greater than 18 Angstrom units.

### Claim 3 (depends on 2)

A composition as described in claim 2 wherein crystals of said guest material are grown within said pores.

### Claim 4 (depends on 2)

A composition as described in claim 2 wherein said guest material is selected from the group consisting of Periodic Table Groups III-V, II-VI and IV-VI semiconducting compounds.

### Claim 5 (depends on 4)

A composition as described in claim 4 wherein said guest material includes gallium arsenide.

### Claim 6 (depends on 2)

A composition as described in claim 2 wherein said guest material includes lead iodide.

### Claim 7 (depends on 2)

A composition as described in claim 2 wherein the host material is a silicate containing essentially no aluminum.

### Claim 8 (depends on 2)

A composition as described in claim 2 wherein said clusters are aggregated within said pores, thereby forming fiber-like strands of said guest material.

### Claim 9 (depends on 2)

A composition as described in claim 2 wherein the maximum average diameters of said clusters are of smaller sizes than the diameters of said pores.

### Claim 10 (depends on 8)

A composition as described in claim 8 wherein said guest material includes gallium arsenide.

### Claim 11

A composition exhibiting second order nonlinear optical properties, comprising:
a host material comprising an inorganic, porous, non-layered crystalline phase material exhibiting, after calcination, an arrangement of uniformly sized pores, said pores having diameters of at least about 13 Angstrom units, said phase material exhibiting an X-ray diffraction pattern with at least one peak at a position greater than about 18 Angstrom units d-spacing and exhibiting a benzene adsorption capacity of greater than about 15 grams benzene per 100 grams of said phase material at 50 torr and 25.degree. C., and
an organic guest material incorporated into the pores of said host material, said organic guest material displaying non-centrosymmetry and the composition providing second harmonic generation when subjected to electromagnetic radiation of a selected frequency.

### Claim 12 (depends on 11)

A composition as described in claim 11 wherein said guest material is selected from the group consisting of organometallic compounds, sorbates and chromophores.

### Claim 13 (depends on 11)

A composition as described in claim 11 wherein said host material is a silicate having a hexagonal arrangement of uniformly sized pores and exhibiting, after calcination, a hexagonal electron diffraction pattern that can be indexed with a d.sub.100 value greater than 18 Angstrom Units.

### Claim 14 (depends on 11)

A composition as described in claim 11 wherein crystals of said guest material are grown within said pores.

### Claim 15 (depends on 11)

A composition as described in claim 11 wherein said host material is a silicate containing essentially no aluminum.

### Claim 16 (depends on 13)

A composition as described in claim 13 wherein the diameters of said pores are sufficiently small with respect to the diameters of said crystals that said pores enhance the orientation of said crystals.