Peer review is the driving force of journal development, and reviewers are gatekeepers who ensure that Photonics maintains its standards for the high quality of its published papers. Thanks to the cooperation of our reviewers, in 2020, the median time to first decision was 14 days and the median time to publication was 36 days. The editors would like to express their sincere gratitude to the following reviewers for their precious time and dedication, regardless of whether the papers were finally published:
| Abaza, Mohamed | Livache, Clément |
| Abegão, Luis Miguel Gomes | Llorens, José Manuel |
| Aboites, Vicente | Luo, Xiaobing |
| Agapito, Guido | Lutman, Alberto |
| Aggarwal, Geetika | Madani, Abbas |
| Agresti, Antonio | Madhukar, A. |
| Ahmadivand, Arash | Maffini, Alessandro |
| Ajith Singh, Mithun Kuniyil | Makarov, Sergey |
| Aksenov, Valerii | Manceau, Jean-Michel |
| Alabastri, Alessandro | Manousiadis, Pavlos P. |
| Alfaro-Gómez, Mariana | Manuel, Aleixandre |
| Alvarez Mendoza, Cesar Ivan | Masoller, Cristina |
| Amato, Luigi Santamaria | Masunov, Artem |
| Anashkina, Elena | Matsutani, Akihiro |
| Andreou, Chrysafis | Mattarelli, Maurizio |
| Andrews, David | Matttheakis, Marios |
| Androutsos, Nikolaos A. | Maulini, Richard |
| Antonacci, Giuseppe | Michal, Kohout |
| Anttu, Nicklas | Michihata, Masaki |
| Ariyawansa, Gamini | Min, Kyungtaek |
| Arnabat-Domínguez, Josep | Min, Rui |
| Ávalos-Ovando, Oscar | Miniewicz, Andrzej |
| Avrutin, Eugene A. | Minin, Igor V. |
| Bacco, Davide | Miyamoto, Tomoyuki |
| Baghdasaryan, Tigran | Monti, Alessio |
| Balakrishnan, Deepan | Morikawa, Osamu |
| Banik, Gourab Dutta | Morinaga, Atsuo |
| Bao, Yi | Mosca, Mauro |
| Baptista, António M. G. | Mukherjee, Bablu |
| Bar, Ilana | Myśliwiec, Jarosław |
| Baral, Susil | Nada, Masahiro |
| Bardella, Paolo | Naftaly, Mira |
| Barrera, David | Nakata, Yosuke |
| Basieva, Irina | Navarro-Cía, Miguel |
| Batagelj, Bostjan | Naydenova, Izabella |
| Beiu, Roxana-Mariana | Nettelblad, Carl |
| Bejaoui, Salma | Neu, Jens |
| Belarouci, Ali | Neufeld, Ofer |
| Belousov, Yu. M. | Nguyen, Dong-Nhat |
| Benedikovic, Daniel | Nguyen, Hieu Pham Trung |
| Benis, Emmanouil P. | Nikolopoulos, Lampros |
| Bezus, Evgeni A. | Nissen, Ivor |
| Bharmal, Nazim | Novelli, Fabio |
| Blanco, Sonia | O’Duill, Sean |
| Błaszczak, Urszula | Oermann, Michael R. |
| Booker, Edward | Ogawa, Kensuke |
| Borisova, Ekaterina | Ohira, Shin-Ichi |
| Botas, Alexandre M. P. | Ok, Gyeongsik |
| Botez, Dan | Ortín-Martínez, Arturo |
| Boulogeorgos, Alexandros-Apostolos A. | Osório, Jonas H. |
| Bräuer-Burchardt, Christian | Ozaki, Ryotaro |
| Browning, Colm | Pachnicke, Stephan |
| Budinski, Vedran | Pagiatakis, Gerasimos |
| Bures, Miroslav | Palacios-Laloy, Agustin |
| Busoni, Lorenzo | Palaia, Gaspare |
| Butt, M. Ali | Pallotta, Luca |
| Bykhovsky, Dima | Paraschis, Loukas |
| Bykov, Dmitry A. | Parfenov, Vadim |
| Caldas, Paulo | Parfenov, Vadim A. |
| Calle Cancho, Jesús | Pastor, David |
| Campanella, Carlo Edoardo | Paternò, Giuseppe Maria |
| Campbell, Sawyer D. | Patrizi, Barbara |
| Cardano, Filippo | Pelster, Axel |
| Carriles, Ramón | Peña, Francisco J. |
| Caspary, Reinhard | Penn, Gregory |
| Castellani, Carlos E. S. | Pepper, Brian J. |
| Castro Do Amaral, Gustavo | Perez, Rafael |
| Castro-Camus, Enrique | Perez-Ramirez, Carlos |
| Chan, Sze Chun | Petersen, Christian Rosenberg |
| Chang, Wonkeun | Petronijevic, Emilija |
| Chen, Bo-Hao | Pierściński, Kamil |
| Chen, Jing | Pinheiro, Felipe |
| Chen, Kai-Sheng | Ponomarev, Dmitry |
| Cheng, Hsu-Chih | Porfirev, Alexey |
| Cheng, Hua | Porte, Xavier |
| Chi, Hao | Prelipceanu, Marius |
| Chiappini, Andrea | Prikulis, Juris |
| Choi, Heejoo | Prochazka, Ivan |
| Choi, Hojong | Pruszyńska-Karbownik, Emilia |
| Chong, Yi Dong | Pryamikov, Andrey |
| Chu, Suoda | Pu, Mingbo |
| Chung, YeonHo | Quero, Giuseppe |
| Coelho, João Pinto | Radner, Hannes |
| Collini, Elisabetta | Rafayelyan, Mushegh |
| Cong, Longqing | Rafique, Subrina |
| Consoli, Antonio | Rahman, Anis |
| Conteduca, Donato | Rasskazov, Ilia |
| Convissar, Robert A. | Rego, Gaspar |
| Costa-Vera, Cesar | Reisslein, Martin |
| Coulon, Pierre-Marie | Ren, Dingkun |
| Cruz, Luís Alberto Da Silva | Ren, Haoran |
| Cruz, Maria-Luisa | Ren, Yuxuan |
| Curto, Alberto | Resnick, Andrew |
| Dalir, Hamed | Revin, Dmitry |
| Dantan, Aurélien | Reyes Vera, Erick |
| Darafsheh, Arash | Ribak, Erez |
| Dash, Jitendra Narayan | Ribeiro, Paulo A. |
| Dattoli, Giuseppe | Rico-Yuste, Alberto |
| Davoodzadeh, Nami | Rijckaert, Hannes |
| Dawidowski, Wojciech | Rimpiläinen, Tommi |
| De Dominicis, Luigi | Rizou, Zoe V. |
| De Fátima Domingues, Maria | Rodriguez Diaz, Camilo Arturo |
| De Regis, Michele | Rodríguez-Lara, Blas Manuel |
| Di Pietro, Paola | Rodriguez-Lopez, Pablo |
| Ding, Xinrui | Rohm, Andre |
| Djafari-rouhani, Bahram | Rosa, Paweł |
| Do, Yun Seon | Rosas Romero, Roberto |
| Domínguez, Jorge Luis | Roshchupkin, Sergei P |
| Dong, Mark | Rovati, Luigi |
| D’Orazio, Antonella | Roycroft, Brendan |
| Dorrah, Ahmed | Ruic, Dino |
| Drexler, Petr | Ruiz Lombera, Ruben |
| Dubey, Richa | Runge, Patrick |
| Ebisawa, Satoshi | Saavedra, Gabriel |
| Edrei, Eitan | Sabry, Yasser |
| Edwards, Paul R. | Sackett, Charles |
| El-Shenawee, Magda | Saifaddin, Burhan |
| Erro Betrán, María José | Sakan, Nenad |
| Esfahani Monfared, Yashar | Sakhabutdinov, Airat |
| Esquivias, Ignacio | Salem, Mohamed A. |
| Faccialà, Davide | Sánchez Saavedra, María Del Pilar |
| Fang, Jian | Sánchez-González, José-María |
| Feldt, Markus | Sanchez-Lopez, Juan De Dios |
| Fernando, Xavier | Santana, Ted |
| Ferrante, Camilla | Schares, Laurent |
| Ferraro, Antonio | Schasfoort, Richard |
| Figueiredo, Monica | Scheinker, Alexander |
| Flores, Jorge Luis | Schlippert, Dennis |
| Fomin, Vladimir M. | Schneidmiller, Evgeni A. |
| Fotiadi, Andrei | Scholkmann, Felix |
| Franco, Lourdes | Schreiber, Ulrich |
| Franco, Sandra | Seguel, Fabian |
| Francois, Alexandre | Sęk, Grzegorz |
| Frigerio, Jacopo | Sekkat, Zouheir |
| Frolov, Aleksandr | Serafino, Giovanni |
| Fujigaki, Motoharu | Seres, Jozsef |
| Galbács, Gábor | Serra, Enrico |
| Gallacher, Kevin | Servin, Manuel |
| GASSIN, Pierre-Marie | Sevic, Dragutin |
| Geints, Yurii E | Shabalin, Anatoly |
| Ghosh, Souvik | Shalf, John M. |
| Gil Santos, Eduardo | Shi, Liping |
| Gili, Valerio Flavio | Shivakumar, Vibhav Bharadwaj |
| Giribono, Anna | Shojafar, Mohammad |
| Giuliano, Domenico | Siciliani, Mario |
| Góbi, Sándor | Silveirinha, Mário G. |
| González De Sande, Juan Carlos | Simon, Bertrand |
| González-Vila, Álvaro | Sinha, Raju |
| Goryashko, Vitaliy | Sirenko, Andrei |
| Grassani, Davide | Slezák, Ondřej |
| Grassman, Tyler J. | Smołka, Bogdan |
| Grozeva, Margarita | So, Hongyun |
| Gutierrez, Ana Maria | Sohn, Martin Y. |
| Guzmán, Borja Genovés | Sójka, Lukasz |
| Guzowski, Bartłomiej | Soltanian, Reza |
| Hadi, Muhammad Usman | Spampinati, Simone |
| Hai, Shafiqul | Stafeev, Sergey |
| Halir, Robert | Staicu, Angela |
| Hammad, Mohab | Stanca, Horia |
| Han, Young-Geun | Steglich, Patrick |
| Hasan, MD Tanvir | Stehr, Jan Eric |
| Hebling, János | Strozzi, Matteo |
| Herrera-Tapia, Jorge | Su, Ruoyu |
| Hill, Cary | Sung, Minkyu |
| Hoenders, Bernhard J. | Syty, Pawel |
| Hoffmann, Andreas | Tai, Yi-Hsin |
| Holzmeier, Fabian | Takahashi, Yusuke |
| Horvath, Tomas | Takei, Hiroyuki |
| Huang, Chun-Ying | Tan, Chaoliang |
| Hussein, Moustafa | Tan, Mingming |
| Iiyama, Kouichi | Tan, Rex Xiao |
| Ijaz, Mohammed | Tarnowski, Karol |
| Iordanova, Ekaterina | Tehranchi, Amirhossein |
| Jain, Saurabh | Thakur, Ashutosh |
| Jaroszewicz, Zbigniew | Tian, Pengfei |
| Jaworski, Piotr | Timpu, Flavia |
| Jiménez, Juan | Torres-Cisneros, Miguel |
| Joo, K. K. | Troia, Benedetto |
| Jouane, Youssef | Troia, Sebastian |
| Jovic, Aleksandar | Trusovas, Romualdas |
| Joyce, Daniel S. | Tsigaridas, Georgios N. |
| Jurasekova, Zuzana | Tsiropoulou, Eirini Eleni |
| Kamikawachi, Ricardo | Úbeda Farré, Eduard |
| Kandadai, Nirmala | Udalcovs, Aleksejs |
| Kaplan, Andrey | Umanskii, B. A. |
| Karabchevsky, Alina | Upputuri, Paul Kumar |
| Karachinsky, Leonid | Uryupin, Prof. Sergei |
| Kazanskiy, Nikolay L. | Valadez, Ivan Cano |
| Kbashi, Hani J. | Valle, Ángel |
| Kerdoncuff, Hugo | Vasconcelos, Helena Cristina |
| Khabibullin, Rustam | Vershovskii, Anton |
| Khokhlova, Margarita A. | Veselovskii, Igor |
| Khope, Akhilesh S. P. | Vicente, Carlos Miguel Santos |
| Kim, Bom Soo | Viotti, Anne-Lise |
| Kim, Jinyoung | Vivona, Marilena |
| Kim, Yong-Su | Voué, Michel |
| Kiselev, Aleksei P. | Vozianova, Anna |
| Kita, Tomohiro | Wahaia, Faustino |
| Klee, Sascha | Walborn, Stephen |
| Klotzkin, David | Wang, Boxiang |
| Kobtsev, Sergey | Wang, Hsiang-Chen |
| Kolek, Andrzej | Wang, Pengfei |
| Kopylov, Evgenii | Wang, Ruijun |
| Koral, Can | Wang, Yunxiang |
| Korotyeyev, Vadym | Wang, Zixiong |
| Kotlyar, Victor | Wenzel, Hans |
| Kovalev, Anton | Wilkinson, Timothy |
| Kovalsky, Marcelo G. | Wolff, Marcus |
| Kovanis, Vassilios | Wu, Jinsong |
| Kowalewska-Kudłaszyk, Anna | Xu, Tianhua |
| Kudryashov, Sergey I. | Yamijala, Sharma SRKC |
| Kumar Donta, Praveen | Yang, Terry Chien Jen |
| Kuzmik, Jan | Yap, Lim Wei |
| Kuznetsov, Artem A. | Yasir, Muhammad |
| Labate, Giuseppe Falvo D. Urso | Yeh, Chien-Hung |
| Lai, XuanYang | Yeh, Pinghui Sophia |
| Lavacca, Francesco G. | Yiannopoulos, Kostas |
| Lecler, Sylvain | Yokota, Nobuhide |
| Lee, Byoungho | Yoshino, Toshihiko |
| Lee, Kun-Mu | Yue, Yang |
| Lee, Kwang Jo | Zaghloul, Mohamed |
| Lemaire, Joël | Zakrzewski, Zbigniew |
| Lembrikov, Boris | Zara, Francesca |
| Lenstra, Daan | Zemlyanov, Aleksandr |
| Lesiak, Piotr | Zervos, Harry |
| Létoublon, Antoine | Zetterberg, Johan |
| Leykam, Daniel | Zhang, Daming |
| Li, Xiang | Zhang, Wei |
| Lim, Hyang-Tag | Zhang, Yinan |
| Lima, Mário | Zhang, Yuanhang |
| Lin, Tong | Zhang, Zilong |
| Lin, Yuankun | Zikidis, Konstantinos C. |
| Lindemann, Markus | Zouros, Grigorios |
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