NEW DELHI : Electric scooter maker Ather Energy expects to achieve $1 billion in revenue in 2023 and turn profitable in the next few years, helped by a growing retail presence. In an interview, Tarun Mehta, co-founder and chief executive, spoke about how the company, backed by Hero MotoCorp and the National Infrastructure Investment Fund, is using technology to drive user experience with enhanced touchscreens and features such as hill assist and cruise control, on its scooters. Edited excerpts: How much have you raised to date, and by when do you expect to turn a unicorn? We’ve raised a total…