Please Mr.Prasanth: Dont get confused:
a) If you know English, kindly jot it down on a A4 size typing paper in very simple English with no jargons,what ever you wanted in POA.Visit Indian Embassy or Indian Consulate at USA where ever situated.Pay the requisite fee in US Dollars for endorsement.
b) Send it to your Pita Shri in India through courier if cheap or through Americal Postal Service and request your Pita Shri to get it Registred in the Registration Office.
c) No notarisation is required in USA, once it is endorsed by the Indian Embassy/Consulate.
d) Your Pita Shri would be able to use it as required to buy property in India on your behalf.
e) But kindly do not send a GENERAL POWER OF ATTORNEY but specifically to buy property.