Browsing by Author "Yeh, Zao-En"

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Characteristics of multileaf holey light-emitting diodes for fiber-optic communications
(2008-02-01)
Yang, Hung-Pin D.
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Yeh, Zao-En
;
Lai, Fang-I
;
Kuo, Hao-Chung
;
Chi, Jim Y.
An oxide-confined multileaf holey light-emitting diode (LED) in the 780 nm range is reported. The device is consisted of bottom distributed Bragg reflector (DBR), quantum wells QWs), and top DBR, with a multileaf holey structure within the p-ohmic contact ring for light extraction. The spontaneous emission from under the etched holes and internally reflected lights can be extracted and collimated out of the smaller etched leaf holes. High-resolution imaging studies indicate that the device emits with smaller beams mainly through the multileaf etched holes made it suitable for fiber-optic communications.
InGaAs submonolayer quantum-dot photonic-crystal LEDs for fiber-optic communications
(2010-05-01)
Yang, Hung-Pin D.
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Yeh, Zao-En
;
Lin, Gray
;
Kuo, Hao-Chung
;
Chi, Jim Y.
An InGaAs submonolayer (SML) quantum-dot photonic-crystal light-emitting diode (QD PhC-LED) with for fiber-optic applications is reported. The active region of the device contains three InGaAs SML QD layers. Each of the InGaAs SML QD layers is formed by alternate depositions of InAs (<1 ML) and GaAs. A maximum CW output power of 0.34 mW at 20 mA has been obtained in the 980 nm range. (C) 2010 Elsevier Ltd. All rights reserved.
Single-mode 780 nm multi-leaf holey vertical-cavity surface-emitting lasers
(2007-01-01)
Yang, Hung-Pin D.
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Liu, Jui-Nung
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Yeh, Zao-En
;
Lai, Fang-, I
;
Lee, Tsin-Dong
A single-mode oxide-confined VCSEL with multi-leaf holey structure for fiber-optic applications is demonstrated. Single fundamental mode output power of over 1.1 mW has been achieved in the 780 nm range.
Single-mode 780 nm vertical-cavity surface-emitting lasers with multi-leaf holey structure
(2008)
Yang, Hung-Pin D.
;
Liu, Jui-Nung
;
Yeh, Zao-En
;
Lai, Fang-I
;
Lee, Tsin-Dong
A single-mode oxide-confined vertical-cavity surface-emitting laser (VCSEL) with multi-leaf holey structure for fiber-optic applications is demonstrated. The optical con. nement was done by a multi-leaf holey structure. The deep etched leaf holes were used to provide better mode confinement and suppression of higher order modes. Single fundamental mode continuous-wave output power of over 1.1mW has been achieved in the 780nm range, with a threshold current of approximately 0.9 mA. Side-mode suppression ratio (SMSR) larger than 24 dB has been measured.