Top 5 hmmm. It all depends on your application X. You have to decide what properties are most needed in your intended device. Some of the properties we look for are:
1. Low current during poling at elevated temperatures - Leads to less breakdown. 2. High EO activity. Higher EO activity - Leads to lower voltage, lower power consumption 3. High Tg. Will survive poling and cmos processing. Long term stability is likely. 4. Low loss. In order to make waveguides with low insertion loss material needs to have very low extinction coefficient at wavelength of interest. 5. Ease of processing. Material needs to have good adhesion properties. No use in having a material that peels off after processing. 6. Ease of manufacturing. What's the purpose of having a great chromophore if you can only make a couple grams per year. Yield needs to be high.
I have more to say but I need to get back to work.
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