At the heart of the peer review process are reviewers. These researchers unselfishly donate their time and attention to review manuscripts. Their work is what makes the peer review system work and scholarly journals possible. The editors and publisher of Applied Physics Letters thank all of our reviewers for their conscientious work on behalf of the journal.

We further offer special thanks to the following researchers who have been identified as Applied Physics Letters' top reviewers for 2018. These individuals each reviewed multiple papers for APL, and our editors found their reviews to be consistently thorough and discerning.

Celano, Umberto IMEC, Belgium 
Di Bartolomeo, Antonio University of Salerno, Italy 
Facchetti, Antonio Northwestern University, USA 
Huber, Patrick Hamburg University of Technology, Germany 
Ihlefeld, Jon University of Virginia, USA 
Kargar, Fariborz University of California Riverside, USA 
Li, Wei Stanford University, USA 
Movva, Hema C. P. Intel Corporation, USA 
Petzelt, Jan Institute of Physics, Czech Academy of Sciences, Czechoslovakia 
Tsujino, Soichiro Paul Scherrer Institut, Switzerland 
Victora, Randall University of Minnesota, USA 
Yang, In-Sang Ewha Womans University, South Korea 
Zhang, Lei University of California, Berkeley, USA 
Zhang, Yuewei University of California Santa Barbara, USA 
Zhou, You Harvard University, USA 
Zollner, Stefan New Mexico State University, USA 
Celano, Umberto IMEC, Belgium 
Di Bartolomeo, Antonio University of Salerno, Italy 
Facchetti, Antonio Northwestern University, USA 
Huber, Patrick Hamburg University of Technology, Germany 
Ihlefeld, Jon University of Virginia, USA 
Kargar, Fariborz University of California Riverside, USA 
Li, Wei Stanford University, USA 
Movva, Hema C. P. Intel Corporation, USA 
Petzelt, Jan Institute of Physics, Czech Academy of Sciences, Czechoslovakia 
Tsujino, Soichiro Paul Scherrer Institut, Switzerland 
Victora, Randall University of Minnesota, USA 
Yang, In-Sang Ewha Womans University, South Korea 
Zhang, Lei University of California, Berkeley, USA 
Zhang, Yuewei University of California Santa Barbara, USA 
Zhou, You Harvard University, USA 
Zollner, Stefan New Mexico State University, USA