hi,

see IIST bangalore has btech courses in engineering physics, however it would be best for physics research works if you do bsc in physics , then you need to do msc in physics, after that you may go for phd in indian colleges or abroad, engineering course is related with applied physics, and it mostly limited to the particular engineering domain, for vast knowledge and depth study it wuld be best to do bsc course. you may try for iisc bangalore bs-ms courses of 5 years.