suggest a current booster circuit DC-DC 1uA to 3mA
No, this is not possible:

The power you have is: 1.2 uA * 1.5 V = 1.8 uWatt (1.8 micro Watt = 0.0000018 Watt)

The power you need is: 3 mA * 0.6 V = 1.8 mWatt (1.8 milli Watt = 0.0018 Watt)

So you need 0.0018 / 0.0000018 = 1000 times more than you have.

It is like buying something which costs $ 1000 but you only have $ 1.