Skip to main content Accessibility help

Room Temperature Excitonic Absorption in Small Cds Crystallites

  • D.K. Rai (a1) and Binod Kumar (a1)


The absorption characteristics of commercial CdS-containing yellow glass which shows constant transmitted intensity over a range of incident CW laser intensity have been studied at room temperature. Although the thick specimen (t>0.6 mm) shows only a broad step-like feature near λ>460 nm, a thin (t-0.09 mm) specimen shows two absorption features which can be interpreted as the first two quantum-confined exciton absorption features corresponding to a crystallite size of -45 Å. The absorption spectrum of a sample (t∼O.6 mm) heated for 15 min. at 700°C shows two new absorption features at 450 nm and 380 nm, which correspond to a much smaller crystallite size of -25 Å. This reduction in size is not inconsistent with estimates made from a well-known model for crystallite growth. Some consequences of these changes in the absorption features on the optical nonlinearities of the glass will be discussed.



Hide All
1. Auston, D.H. and Ballman, A.A., Bhattacharya, P., et al. , App. Opt. 26, 211 (1987).
2. Bret, G. and Gires, F., App. Phys. Letts. 4, 175 (1964).
3. Jain, R.K. and Lind, R.C., J. Opt. Soc. Amer. 73, 647 (1983).
4. Yang, F., Li, D., Tian, N., Xiong, G., and Xu, X., J. Lumin 40&41, 527 (1988).
5. Han, S.K., Huo, Z., Srivastava, R., and Ramaswamy, R.V., J. Opt. Soc. Am. B6 663668 (1989).
6. Jungk, G., Phys. Stat. Sol. (b) 150, 483 (1988).
7. Kochelap, V.A., Kuznetsor, A.V., and Sokoler, V.N., Phys. Stat. Sol. (b) 150 489 (1988).
8. Pottinger, T. (private communication)
9. Borelli, N.F., Hall, D.W., Holland, H.J., and Smith, D.W., J. Appl. Phys. 61, 5399 (1987).
10. Ekimov, A.K. and Efros, Al.I., in Laser Optics of Condensed Matter, edited by Bironan, J.L., Cummins, H.Z., and Kaplyansku, A.A. (Plenum, New York, 1988) p. 199.
11. Ekimov, A.I. and AEfros, l.I., Phys. Stat. Sol. (b) 150, 627 (1988).
12. Rustagi, K.C. and Flytzanis, C., Opt. Letts. 9, 344 (1984).
13. Jerominek, H., Pigeon, M., Patela, S., Jakubczyk, Z., Delisle, D., and Tremblay, R., J. Appl. Phys. 63, 957 (1988).


Full text views

Total number of HTML views: 0
Total number of PDF views: 0 *
Loading metrics...

Abstract views

Total abstract views: 0 *
Loading metrics...

* Views captured on Cambridge Core between <date>. This data will be updated every 24 hours.

Usage data cannot currently be displayed