Trapping of radiation in a laser ablated YBa2Cu3O7 plume

被引:8
作者
Riley, D [1 ]
Doyle, L [1 ]
AlWazzan, R [1 ]
机构
[1] ORIEL INSTRUMENTS, BELFAST BT9 5BN, ANTRIM, NORTH IRELAND
关键词
D O I
10.1063/1.361438
中图分类号
O59 [应用物理学];
学科分类号
摘要
A tunable dye laser has been used to selectively photo-hump transitions in a laser ablated YBa2Cu3O7 plume. The resultant fluorescence and scattered light has been monitored both with a photo-multiplier tube and a gated intensified CCD array camera. The spatial and temporal characteristics of the fluorescence are used to demonstrate that phonons emitted within the plume are strongly reabsorbed, and thus radiation is effectively trapped. Measurement of the degree of trapping is limited due to an alternative radiative decay channel, but a maximum escape probability of about 10% can be inferred, even several centimeters from the target surface, and more than 10 mu s after the initial ablation pulse. The implications for plasma spectroscopy and laser induced fluorescence studies of ablated plumes are discussed. (C) 1996 American Institute of Physics.
引用
收藏
页码:7223 / 7226
页数:4
相关论文
共 14 条
[1]   A technique for mapping three-dimensional number densities of species in laser produced plumes [J].
AlWazzan, RA ;
Lewis, CLS ;
Morrow, T .
REVIEW OF SCIENTIFIC INSTRUMENTS, 1996, 67 (01) :85-88
[2]   RADIATION IMPRISONMENT IN LASER BLOW-OFF PLASMA [J].
BAKOS, JS ;
FOLDES, IB ;
IGNACZ, PN ;
KEDVES, MA ;
SZIGETI, J .
LASER AND PARTICLE BEAMS, 1992, 10 (04) :715-721
[3]   PHOTON TRAPPING MODELS FOR X-RAY LASERS [J].
EDER, DC ;
SCOTT, HA ;
MAXON, S ;
LONDON, RA .
APPLIED OPTICS, 1992, 31 (24) :4962-4968
[4]  
ELASTAL AH, 1995, J APPL PHYS, V77, P6573
[5]   FAST INTENSIFIED-CCD PHOTOGRAPHY OF YBA2CU3O7-X LASER ABLATION IN VACUUM AND AMBIENT OXYGEN [J].
GEOHEGAN, DB .
APPLIED PHYSICS LETTERS, 1992, 60 (22) :2732-2734
[6]  
GEOHEGAN DB, 1990, MATER RES SOC SYMP P, V169, P501
[7]  
Griem HR, 1964, Plasma Spectroscopy
[8]  
HENDRON JM, IN PRESS APPL SURF S
[9]  
IRONS FE, 1971, JQSRT, V22, P1
[10]   2-DIMENSIONAL LASER-INDUCED FLUORESCENCE IMAGING OF NONEMISSIVE SPECIES IN PULSED-LASER DEPOSITION PROCESS OF YBA2CU3O7-X [J].
NAKATA, Y ;
KUMUDUNI, WKA ;
OKADA, T ;
MAEDA, M .
APPLIED PHYSICS LETTERS, 1995, 66 (23) :3206-3208