Return to search

Time-resolved electro-luminescence & optical beam induced current mapping of photonic devices

In this study we have successfully developed the techniques of time-resolved electro-luminescence (EL) and optical beam induced current (OBIC) microscopy for the mapping of photonic devices. We have applied the techniques to examine various photonic devices, including light emitting diodes (LED), organic light emitting diode (OLED), and coplanar waveguide (CPW) devices.
The key development in time-resolved microscopy is the technique of modulation. By measuring the phase delay between the modulation source and the output signal, the response time of the observed devices can be extracted. In electro-luminescence mapping, the phase delay is measured between the applied sinusoidal voltage and the emitted EL, while in OBIC mapping the phase delay is measured between the modulated laser beam and the resulting photocurrent. The phase delay measurements are performed with a lock-in amplifier. In this way, large enhancement in signal-to-noise ratio can also be obtained. Additionally, the technique of varying scanning rate is also developed to synchronize the data acquisition between the LSM and the lock-in amplifier, a key enabling advancement in this thesis study.

Identiferoai:union.ndltd.org:NSYSU/oai:NSYSU:etd-0627105-112240
Date27 June 2005
CreatorsWeng, Peng-Hsiang
ContributorsMei-ying Chang, Tao-yuan Chang, Yi-jen Chiu, Fu-jen Kao, Sheng-lung Huang
PublisherNSYSU
Source SetsNSYSU Electronic Thesis and Dissertation Archive
LanguageCholon
Detected LanguageEnglish
Typetext
Formatapplication/pdf
Sourcehttp://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0627105-112240
Rightscampus_withheld, Copyright information available at source archive

Page generated in 0.0017 seconds