PICOSECOND PHOTOMODULATION SPECTRA OF A-SI-H IN THE SMALL-SIGNAL LIMIT

被引：13

作者：

DEVLEN, RI

KANNER, GS

VARDENY, Z

TAUC, J

机构：

[1] BROWN UNIV,DIV ENGN,PROVIDENCE,RI 02912

[2] UNIV UTAH,DEPT PHYS,SALT LAKE CITY,UT 84112

来源：

SOLID STATE COMMUNICATIONS | 1991年 / 78卷 / 07期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1016/0038-1098(91)90398-F

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

Picosecond photomodulation spectra of a-Si: H have been measured in the spectral range of 1.40 to 2.1 eV and time range of 5 ps to 3 ns for low photocarrier densities (congruent-to 10(17) cm-3). The spectra peak at the absorption edge and decrease exponentially on both sides. It is shown that the previously proposed models for the picosecond transients cannot explain the observed spectra and a new interpretation is proposed and compared with the data. It is based on the electroabsorption effect associated with internal electric fields generated by trapped photocarriers.

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收藏

页码：665 / 669

页数：5

相关论文

共 16 条

[1] Stochastic problems in physics and astronomy [J].

Chandrasekhar, S .

REVIEWS OF MODERN PHYSICS, 1943, 15 (01) :0001-0089

[2]

DEVLEN RI, 1990, 20TH INTERNATIONAL CONFERENCE ON THE PHYSICS OF SEMICONDUCTORS, VOLS 1-3, P2039

[3]

DEVLEN RI, 1990, THESIS BROWN U

[4] TOWARD A UNIFIED THEORY OF URBACHS RULE AND EXPONENTIAL ABSORPTION EDGES [J].

DOW, JD ;

REDFIELD, D .

PHYSICAL REVIEW B-SOLID STATE, 1972, 5 (02) :594-+

[5] ULTRAFAST RECOMBINATION AND TRAPPING IN AMORPHOUS-SILICON [J].

ESSER, A ;

SEIBERT, K ;

KURZ, H ;

PARSONS, GN ;

WANG, C ;

DAVIDSON, BN ;

LUCOVSKY, G ;

NEMANICH, RJ .

JOURNAL OF NON-CRYSTALLINE SOLIDS, 1989, 114 :573-575

[6] INFLUENCE OF INTERFERENCE ON PHOTOINDUCED CHANGES IN TRANSMISSION AND REFLECTION [J].

GRAHN, HT ;

THOMSEN, C ;

TAUC, J .

OPTICS COMMUNICATIONS, 1986, 58 (04) :226-230

[7] PICOSECOND PHOTOINDUCED ABSORPTION AS A PROBE OF METASTABLE LIGHT-INDUCED DEFECTS IN INTRINSIC HYDROGENATED AMORPHOUS-SILICON [J].

GUSTAFSON, TL ;

SCHER, H ;

ROBERTS, DM ;

COLLINS, RW .

PHYSICAL REVIEW LETTERS, 1988, 60 (02) :148-151

[8]

HEPPNER J, 1986, 18TH INT C PHYS SEM, P1033

[9] ROLE OF BIMOLECULAR RECOMBINATION IN PICOSECOND PHOTOINDUCED ABSORPTION OF HYDROGENATED AMORPHOUS-SILICON [J].

JACKSON, WB .

PHILOSOPHICAL MAGAZINE LETTERS, 1989, 60 (06) :277-282

[10] SYSTEMATIC INVESTIGATION OF PICOSECOND PHOTOINDUCED ABSORPTION IN HYDROGENATED AMORPHOUS-SILICON [J].

JACKSON, WB ;

DOLAND, C ;

TSAI, CC .

PHYSICAL REVIEW B, 1986, 34 (04) :3023-3026