35 citations · 89 across the 8 of their papers we have counts for
8 papers
Emission of Circularly Polarized Terahertz Wave from Inhomogeneous Intrinsic Josephson Junctions
Hidehiro Asai, Shiro Kawabata
We have theoretically demonstrated the emission of circularly-polarized terahertz (THz) waves from intrinsic Josephson junctions (IJJs) which is locally heated by an external heat…
Control of Circularly Polarized THz Wave from Intrinsic Josephson Junctions by Local Heating
Hidehiro Asai, Shiro Kawabata
This paper reports a practical method of generating circularly polarized terahertz (THz) waves from intrinsic Josephson junctions (IJJs) and controlling their polarization states b…
Quasi-Superradiant Soliton State of Matter in Quantum Metamaterials
H. Asai, S. Kawabata, A. M. Zagoskin +1
Strong interaction of a system of quantum emitters (e.g., two-level atoms) with electromagnetic field induces specific correlations in the system accompanied by a drastic insrease…
Possibility to enhance teraherz emission from intrinsic Josephson junction by external local heating
Hidehiro Asai, Shiro Kawabata
We theoretically propose a practical method for realizing intense terahertz (THz) emission from intrinsic Josephson junctions (IJJs) using an external heat source. An artificial in…
Two-dimensional macroscopic quantum tunneling in multi-gap superconductor Josephson junctions
Hidehiro Asai, Shiro Kawabata, Yukihiro Ota +1
Low-temperature characters of superconducting devices yield definite probes for different superconducting phenomena. We study the macroscopic quantum tunneling (MQT) in a Josephson…
Effects of lasing in a one-dimensional quantum metamaterial
Hidehiro Asai, Sergey Savel'ev, Shiro Kawabata +1
Electromagnetic pulse propagation in a quantum metamaterial - artificial, globally quantum coherent optical medium - is numerically simulated. We show that for the quantum metamate…
Theory of macroscopic quantum tunneling with Josephson-Leggett collective excitations in multi-band superconducting Josephson junctions
Hidehiro Asai, Yukihiro Ota, Shiro Kawabata +2
Collective excitations reveal fundamental properties and potential applications of superconducting states. We theoretically study macroscopic quantum tunneling (MQT) in a Josephson…
Intense terahertz emission from intrinsic Josephson junctions by external heat control
Hidehiro Asai, Shiro Kawabata
A practical method for realizing intense terahertz (THz) emission from intrinsic Josephson junctions (IJJs) by utilizing external local-heating is proposed and demonstrated theoret…