Ultrafast optical switching of terahertz metamaterials fabricated on ErAs/GaAs nanoisland superlattices.
نویسندگان
چکیده
We demonstrate optical switching of electrically resonant terahertz planar metamaterials fabricated on ErAs/GaAs nanoisland superlattice substrates. Photoexcited charge carriers in the superlattice shunt the capacitive regions of the constituent elements, thereby modulating the resonant response of the metamaterials. A switching recovery time of 20 ps results from fast carrier recombination in the ErAs/GaAs superlattice substrates.
منابع مشابه
Active control of electromagnetically induced transparency analogue in terahertz metamaterials.
Recently reported metamaterial analogues of electromagnetically induced transparency enable a unique route to endow classical optical structures with aspects of quantum optical systems. This method opens up many fascinating prospects on novel optical components, such as slow light units, highly sensitive sensors and nonlinear devices. In particular, optical control of electromagnetically induce...
متن کاملHigh speed terahertz modulation from metamaterials with embedded high electron mobility transistors.
We present a computational and experimental study of a novel terahertz (THz) device resulting from hybridization of metamaterials with pseudomorphic high electron mobility transistors (HEMTs), fabricated in a commercial gallium arsenide (GaAs) process. Monolithic integration of transistors into each unit cell permits modulation at the metamaterial resonant frequency of 0.46 THz. Characterizatio...
متن کاملDesigned ultrafast optical nonlinearity in a plasmonic nanorod metamaterial enhanced by nonlocality.
All-optical signal processing enables modulation and transmission speeds not achievable using electronics alone. However, its practical applications are limited by the inherently weak nonlinear effects that govern photon-photon interactions in conventional materials, particularly at high switching rates. Here, we show that the recently discovered nonlocal optical behaviour of plasmonic nanorod ...
متن کاملExtremely Nonperturbative Nonlinearities in GaAs Driven by Atomically Strong Terahertz Fields in Gold Metamaterials.
Terahertz near fields of gold metamaterials resonant at a frequency of 0.88 THz allow us to enter an extreme limit of nonperturbative ultrafast terahertz electronics: Fields reaching a ponderomotive energy in the keV range are exploited to drive nondestructive, quasistatic interband tunneling and impact ionization in undoped bulk GaAs, injecting electron-hole plasmas with densities in excess of...
متن کاملElectromagnetically induced transparency in terahertz plasmonic metamaterials via dual excitation pathways of the dark mode
Related Articles Electromagnetically induced transparency with quantum interferometry J. Chem. Phys. 136, 084301 (2012) Huge enhancement of optical nonlinearities in coupled Au and Ag nanoparticles induced by conjugated polymers Appl. Phys. Lett. 100, 023106 (2012) Spatial hole burning degradation of AlGaAs/GaAs laser diodes Appl. Phys. Lett. 99, 103506 (2011) Optical limiting properties and ul...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید
ثبت ناماگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید
ورودعنوان ژورنال:
- Optics letters
دوره 32 12 شماره
صفحات -
تاریخ انتشار 2007