Takuya Nishimura Nobuhiro Magome HyunChul Kang Taiichi Otsuji Spectral Narrowing Effect of a Novel Super-Grating Dual-Gate Structure for Plasmon-Resonant Terahertz Emitter. 696-701 2009 92-C IEICE Transactions 5 http://search.ieice.org/bin/summary.php?id=e92-c_5_696&category=C&year=2009&lang=E&abst= db/journals/ieicet/ieicet92c.html#NishimuraMKO09