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    SEC FILE NUMBER
        0-22175
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      CUSIP NUMBER
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                                 UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549

                                   FORM 12B-25

                           NOTIFICATION OF LATE FILING

             (Check One): [ ] Form 10-K [ ] Form 20-F [ ] Form 11-K
                          [X] Form 10-Q [ ] Form N-SAR

                        For Period Ended: March 31, 2004

                         [ ] Transition Report on Form 10-K
                         [ ] Transition Report on Form 20-F
                         [ ] Transition Report on Form 11-K
                         [ ] Transition Report on Form 10-Q
                         [ ] Transition Report on Form N-SAR
                         For the Transition Period Ended: ___________________

===============================================================================
  Read Instruction (on back page) Before Preparing Form. Please Print or Type.
    NOTHING IN THIS FORM SHALL BE CONSTRUED TO IMPLY THAT THE COMMISSION HAS
                   VERIFIED ANY INFORMATION CONTAINED HEREIN.
===============================================================================

If the notification relates to a portion of the filing checked above, identify
the Item(s) to which the notification relates:

- -------------------------------------------------------------------------------

PART I -- REGISTRANT INFORMATION

         EMCORE Corporation
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Full Name of Registrant

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Former Name if Applicable

         145 Belmont Drive
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Address of Principal Executive Office (Street and Number)

         Somerset, New Jersey  08873
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City, State and Zip Code

PART II -- RULES 12B-25(B) AND (C)

If the subject report could not be filed without unreasonable effort or expense
and the registrant seeks relief pursuant to Rule 12b-25(b), the following should
be completed. (Check box if appropriate)

                 (a) The reasons described in reasonable detail in Part III of
                 this form could not be eliminated without unreasonable effort
                 or expense;
                 (b) The subject annual report, semi-annual report, transition
                 report on Form 10-K, Form 20-F,11-K or Form N-SAR, or portion
[X]              thereof, will be filed on or before the fifteenth calendar day
                 following the prescribed due date; or the subject quarterly
                 report or transition report on Form 10-Q, or portion thereof
                 will be filed on or before the fifth calendar day following the
                 prescribed due date; and
                 (c) The accountant's statement or other exhibit required by
                 Rule 12b-25(c) has been attached if applicable.






PART III -- NARRATIVE

State below in reasonable detail the reasons why Forms 10-K, 20-F, 11-K, 10-Q,
N-SAR, or the transition report portion thereof, could not be filed within the
prescribed time period.


EMCORE has determined, based on consultation with its auditors, that the gain
realized upon the retirement in February 2004 of approximately $146 million
aggregate principal amount of its 5% Convertible Subordinated Notes due May 2006
in exchange for approximately $80.3 million of its new 5% Convertible Senior
Subordinated Notes due May 15, 2011 and approximately 7.7 million shares of its
common stock should be classified as other income (under "Other expenses")
rather than as operating income (under "Operating expenses") in its statement of
operations. Accordingly, we require additional time to revise our Quarterly
Report on Form 10-Q for the quarter ended March 31, 2004. This reclassification
does not affect EMCORE's balance sheet or statement of cash flows and has no
effect on our previously reported earnings per share or net worth. We expect to
file this Form 10-Q shortly.

PART IV-- OTHER INFORMATION

(1) Name and telephone number of person to contact in regard to this
    notification



         Howard W. Brodie, Vice President and General Counsel          (732)            271-9090
- ------------------------------------------------------------------------------------------------------
                                                                          
          (Name)                                                    (Area Code) (Telephone Number)


(2) Have all other periodic reports required under Section 13 or 15(d) of the
Securities Exchange Act of 1934 or Section 30 of the Investment Company Act of
1940 during the preceding 12 months or for such shorter period that the
registrant was required to file such report(s) been filed? If answer is no,
identify report(s).
                                                                    [X]Yes [ ]No
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(3) Is it anticipated that any significant change in results of operations from
the corresponding period for the last fiscal year will be reflected by the
earnings statements to be included in the subject report or portion thereof?
                                                                   [  ]Yes [X]No

If so, attach an explanation of the anticipated change, both narratively and
quantitatively, and, if appropriate, state the reasons why a reasonable estimate
of the results cannot be made.

- -------------------------------------------------------------------------------

                               EMCORE Corporation
- -------------------------------------------------------------------------------
                  (Name of Registrant as Specified in Charter)

has caused this notification to be signed on its behalf by the undersigned
hereunto duly authorized.

Date     May 18, 2004                         By  /s/ Thomas G. Werthan
      --------------------------------------      -----------------------
                                                  Thomas G. Werthan
                                                  Vice President and Chief
                                                  Financial Officer

INSTRUCTION: The form may be signed by an executive officer of the registrant or
by any other duly authorized representative. The name and title of the person
signing the form shall be typed or printed beneath the signature. If



the statement is signed on behalf of the registrant by an authorized
representative (other than an executive officer), evidence of the
representative's authority to sign on behalf of the registrant shall be filed
with the form.

                                    ATTENTION
- -------------------------------------------------------------------------------
   INTENTIONAL MISSTATEMENTS OR OMISSIONS OF FACT CONSTITUTE FEDERAL CRIMINAL
                        VIOLATIONS (SEE 18 U.S.C. 1001).
- -------------------------------------------------------------------------------

                              GENERAL INSTRUCTIONS

1. This form is required by Rule 12b-25 (17 CFR 240.12b-25) of the General Rules
and Regulations under the Securities Exchange Act of 1934.

2. One signed original and four conformed copies of this form and amendments
thereto must be completed and filed with the Securities and Exchange Commission,
Washington, D.C. 20549, in accordance with Rule 0-3 of the General Rules and
Regulations under the Act. The information contained in or filed with the form
will be made a matter of public record in the Commission files.

3. A manually signed copy of the form and amendments thereto shall be filed with
each national securities exchange on which any class of securities of the
registrant is registered.

4. Amendments to the notifications must also be filed on Form 12b-25 but need
not restate information that has been correctly furnished. The form shall be
clearly identified as an amended notification.

5. Electronic filers. This form shall not be used by electronic filers unable to
timely file a report solely due to electronic difficulties. Filers unable to
submit a report within the time period prescribed due to difficulties in
electronic filing should comply with either Rule 201 or Rule 202 of Regulation
S-T (ss.232.201 or ss.232.202 of this chapter) or apply for an adjustment in
filing date pursuant to Rule 13(b) of Regulation S-T (ss.232.13(b) of this
Chapter).