|
|
 | | From: | Choi | | Subject: | I'm looking for proper gap filling materials.. | | Date: | 21 Jan 2005 21:17:21 -0800 |
|
|
 | Hello,
I'm looking for some materials for gap filling.
I fabricated some photonic device which is consist of PD, and silica
on silicon waveguide in our lab.
There is 100~150 micron gap between waveguide and PD, and index
matching problem occured.
So, I want to fill it with some proper material which has refractive
index around 1.462
I thought that polymer or SOG (spin on glass) will function to it.
But the dn/dT of polymer is about -1.5 * 10^-4 so that at a high
temperature (~80 degree C) my device doesn't work correctly.
Also, SOG has some problem now like crack or refractive index tuning
problem..
CVD or other thin film deposition methods are not fit to my purpose.
I need some materials that can be used like epoxy.
Most of epoxies are too expensive for my device... so that I couldnt
choose it.
Is there any materials like that :
1. it must be able to be hardened by thermal or UV curing
2. adhesive characteristics are not needed.
(All device elements are already fixed)
3. Refractive index (after hardened) is around 1.462 @ 633nm
wavelength
(at room temperature)
4. I want to adjust it's refractive index
by mixing with some solvent.. or some other methods ?
(index adjustable .. tuning range is 1.45~1.47 )
I will thanks to any comment.
thank you.
|
|
| | From: | Ian Stirling | | Subject: | Re: I'm looking for proper gap filling materials.. | | Date: | 22 Jan 2005 23:28:29 GMT |
|
|
| Choi wrote:
> Hello,
>
> I'm looking for some materials for gap filling.
>
> I fabricated some photonic device which is consist of PD, and silica
> on silicon waveguide in our lab.
>
> There is 100~150 micron gap between waveguide and PD, and index
> matching problem occured.
> So, I want to fill it with some proper material which has refractive
> index around 1.462
>
> I need some materials that can be used like epoxy.
>
> Most of epoxies are too expensive for my device... so that I couldnt
> choose it.
A 150 micron film of epoxy is too expensive?
|
|
|
