Superconducting and THz Device Technology

We propose a surface-emitted cavity configuration for a terahertz-wave parametric oscillator that allows THz wave emission perpendicular to the crystal surface without any output coupler. The oscillating idler and pump waves are reflected at the surface of a nonlinear crystal in a single resonance cavity, satisfying t…

Abstract—The lack of wave-plates for the terahertz region opens the way for novel components/devices enabling polarization control at these frequencies. With the aid of chiral metamaterials — a new class of metamaterials — novel possibilities for the fabrication of multilayer structures for the realization of polariza…

The sixth generation (6G) wireless networks aim to achieve ultra-high data transmission rates, very low latency, and enhanced energy-efficiency. To this end, terahertz (THz) band is one of the key enablers of 6G to meet such requirements. The THz-band systems are also quickly emerging as high-resolution sensing device…

Most methods of imaging in the terahertz (THz) spectral region utilize either pulsed-laser sources or require the THz generation and detection sources to be phase coherent. The application of interferometric imaging to the THz range is described. Interferometric imaging offers considerable advantages in this regard du…

• HAKAN ALTAN

Terahertz intersubband photodetectors are developed based on GaN/AlGaN quantum wells grown on a free-standing semi-polar (202¯1¯) GaN substrate. These quantum wells are nearly free of the polarization-induced internal electric fields that severely complicate the design of nitride intersubband devices on traditional c-…

• HABİBE DURMAZ SAĞIR

We fabricated rectangular mesa structures of superconducting Bi 2 Sr 2 CaCu 2 O 8+ d (Bi2212) using e-beam lithography and Ar ion beam etching techniques for terahertz (THz) emission. c -axis resistance versus temperature ( R – T ), current–voltage ( I – V ) characteristics and bolometric THz power measurements were p…

• FULYA KÖSEOĞLU

We fabricated rectangular mesa structures of superconducting Bi 2 Sr 2 CaCu 2 O 8+ d (Bi2212) using e-beam lithography and Ar ion beam etching techniques for terahertz (THz) emission. c -axis resistance versus temperature ( R – T ), current–voltage ( I – V ) characteristics and bolometric THz power measurements were p…

• HASAN KÖSEOĞLU

We fabricated rectangular mesa structures of superconducting Bi 2 Sr 2 CaCu 2 O 8+ d (Bi2212) using e-beam lithography and Ar ion beam etching techniques for terahertz (THz) emission. c -axis resistance versus temperature ( R – T ), current–voltage ( I – V ) characteristics and bolometric THz power measurements were p…

• YILMAZ ŞİMŞEK

We fabricated rectangular mesa structures of superconducting Bi 2 Sr 2 CaCu 2 O 8+ d (Bi2212) using e-beam lithography and Ar ion beam etching techniques for terahertz (THz) emission. c -axis resistance versus temperature ( R – T ), current–voltage ( I – V ) characteristics and bolometric THz power measurements were p…

• YASEMİN DEMİRHAN

We fabricated rectangular mesa structures of superconducting Bi 2 Sr 2 CaCu 2 O 8+ d (Bi2212) using e-beam lithography and Ar ion beam etching techniques for terahertz (THz) emission. c -axis resistance versus temperature ( R – T ), current–voltage ( I – V ) characteristics and bolometric THz power measurements were p…

• LÜTFİ ÖZYÜZER
• YASEMİN DEMİRHAN

Abstract The Event Horizon Telescope (EHT) Collaboration recently published the first images of the supermassive black holes in the cores of the Messier 87 and Milky Way galaxies. These observations have provided a new means to study supermassive black holes and probe physical processes occurring in the strong-field r…

• KADRİ YAKUT

We present a thermal analysis of a patterned mesa on a Bi2Sr2CaCu2O8(Bi2212) single crystal that is based on tunneling characteristics of the c-axis stack of ~800 intrinsic Josephson junctions in the mesa. Despite the large mesa volume (e.g., 40 times 300 times 1.2 mum3) and power dissipation that result in self-heati…

• LÜTFİ ÖZYÜZER