Photoresponse of porous silicon for potential optical sensing Shahzad Ahmed, Sehba Khatun, Sahar Sallam, Arshiya Ansari, Zeeshan Alam Ansari, Rishi Ranjan Kumar, Jabir Hakami and Afzal Khan EPL, 139 3 (2022) 36001 Published online: 01 August 2022 DOI: 10.1209/0295-5075/ac7d08