Quasi-optical highly sensitive Schottky-barrier detector for a wide-band FIR FEL

被引：27

作者：

Kubarev, VV

Kazakevitch, GM

Jeong, YU

Lee, BC

机构：

[1] Budker Inst Nucl Phys, Novosibirsk 630090, Russia

[2] Korea Atom Energy Res Inst, Taejon 305600, South Korea

来源：

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT | 2003年 / 507卷 / 1-2期

关键词：

free-electron laser; submillimeter detector; Schottky-barrier diode; traveling-wave antenna; corner-cube reflector;

D O I：

10.1016/S0168-9002(03)00911-2

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

A wide-band FIR detector based on the Schottky-barrier diode for the use on a far-infrared FEL facility has been developed. The detector consists of a GaAs chip with diodes of sub-micrometer diameters and a traveling-wave antenna in a 90degrees corner-cube reflector that provided effective transmission of the FIR power to the diode from the input FIR focusing lens. The antenna has been optimized for a wavelength of 337 mum. At this wavelength, the detector has a sensitivity of 200 V/W and a noise equivalent power (NEP) of 0.1 nW/Hz(1/2). These measurements were made by a HCN laser. For a radiation wavelength of 119 mum (H2O laser) the sensitivity and NEP values were measured to be 20 V/W and 1.0 nW/Hz(1/2), respectively. The results of measurements from the compact wide-band FIR FEL facility by the detector in a wide wavelength range are presented. The potentialities of the detector are investigated. (C) 2003 Elsevier Science B.V. All rights reserved.

引用

页码：523 / 526

页数：4