I'll say it one more time. You and those two sites you are quoting, make assumptions that do not apply to my design.
I will say it one more time.
They do not. The 2 sites I quote show how much energy the sun imparts upon a square meter of the surface of the earth.
Insolation is a measure of solar radiation energy received on a given surface area in a given time. It is commonly expressed as average irradiance in watts per square meter (W/m²) or kilowatt-hours per square meter per day kW·h/m²·day.
Over the course of a year the average solar radiation
arriving at the top of the Earth's atmosphere is roughly 1366 watts per square meter.
By the time it gets to the earths surface, it is appx 1000 w/m2.
Regardless of your design, you can not harvest more solar radiation per square meter than the sun sends us. This is not based upon design, but based upon the physical world we live in.
You could gather more energy with mirrors and reflect light to the collector, but then the mirrors are collectors and your surface area increases as you collector area is now including the mirrors: the 1 kw/m2 is still sacrosanct.
Your 3 kw/m2 is bogus, you cannot do it. You cannot design around the constants of our earth.