Design and optimization of bowtie nanoantenna for electromagnetic field enhancement Usman Khan Khalil, Waqas Farooq, Javed Iqbal, Syed Zain Ul Abideen Kazmi, Adnan Daud Khan, Anees Ur Rehman and Saba Ayub Eur. Phys. J. Plus, 136 7 (2021) 754 Published online: 18 July 2021 DOI: 10.1140/epjp/s13360-021-01702-7