Alkali metals doped cycloparaphenylene nanohoops: promising nonlinear optical materials with enhanced performance 由 Rasul, Ruqiya, Mahmood, Tariq, Ayub, Khurshid, Joya, Khurram Saleem, Anwar, Farooq, Saari, Nazamid, Nawaz, R., Gilani, Mazhar Amjad