Yes, going for further research after completion of a B.Tech is indeed very possible. Many B.Tech holders find such interest and move for Masters/Ph.D. programs in the specialized field they were interested in, making further specializations of the particular type of research one wanted to study. Even in such fields as aerospace, electronics and communication engineering, research plays a crucial role in developing new technologies to improve or modify systems already in place and contribute to scientific knowledge. It is therefore not uncommon for universities, research institutions, and even companies to provide openings for research jobs.
Apart from advanced studies, graduates can also conduct research within their job, which involves industrial or government involvement with the cutting-edge technology bodies. Based on research, the areas are diversified into space exploration, defense, telecom sectors, and renewable energy. B.Tech graduates who have interest in research can always team up with people from other disciplines and design experiments and innovate solutions that may see tomorrow. Therefore, for all those interested in exploring and solving deep problems, research after B.Tech can always be a satisfying and impactful career.