NEW-TYPE PHOTOCATHODE FOR POLARIZED ELECTRON SOURCE WITH DISTRIBUTED-BRAGG-REFLECTOR

被引：25

作者：

SAKA, T

KATO, T

NAKANISHI, T

TSUBATA, M

KISHINO, K

HORINAKA, H

KAMIYA, Y

OKUMI, S

TAKAHASHI, C

TANIMOTO, Y

TAWADA, M

TOGAWA, K

AOYAGI, H

NAKAMURA, S

机构：

[1] NAGOYA UNIV, DEPT PHYS, NAGOYA, AICHI 464, JAPAN

[2] SOPHIA UNIV, DEPT ELECT & ELECTR ENGN, CHIYODA KU, TOKYO 102, JAPAN

[3] UNIV OSAKA PREFECTURE, COLL ENGN, SAKAI 593, JAPAN

[4] TOYOTA TECHNOL INST, NAGOYA 468, JAPAN

来源：

JAPANESE JOURNAL OF APPLIED PHYSICS PART 2-LETTERS & EXPRESS LETTERS | 1993年 / 32卷 / 12B期

关键词：

POLARIZED ELECTRON SOURCE; PHOTOCATHODE; STRAINED GAAS; DISTRIBUTED BRAGG REFLECTOR (DBR); QUANTUM EFFICIENCY (QE); ELECTRON SPIN POLARIZATION (ESP);

D O I：

10.1143/JJAP.32.L1837

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

In order to increase the quantum efficiency of the strained GaAs photocathode for a highly polarized electron source, we designed a new type of photocathode with a distributed Bragg reflector (DBR). A Fabry-Perot cavity is formed by the DBR and the GaAs surface. A large enhancement of quantum efficiency was observed at the laser wavelength which satisfied the condition for the resonant absorption of incident laser light. Based on this experiment, it appears promising to make a photocathode which has the quantum efficiency of more than approximately 1% together with electron spin polarization higher than 80%.

引用

页码：L1837 / L1840

页数：4

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